CN104034513B - Spatial polarization light extinction ratio measurement device and method - Google Patents
Spatial polarization light extinction ratio measurement device and method Download PDFInfo
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- CN104034513B CN104034513B CN201410218391.4A CN201410218391A CN104034513B CN 104034513 B CN104034513 B CN 104034513B CN 201410218391 A CN201410218391 A CN 201410218391A CN 104034513 B CN104034513 B CN 104034513B
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Abstract
The invention discloses a kind of spatial polarization light extinction ratio measurement device and method, relate to spatial polarization light extinction ratio measurement field, this measurement apparatus includes optical branching device, measuring light power system, extinction ratio measurement system, signal processing system and data interface display system, optical branching device is connected with measuring light power system, extinction ratio measurement system respectively, measuring light power system, extinction ratio measurement system are all connected with signal processing system, and signal processing system is connected with data-interface display system；Extinction ratio measurement probe separates with extinction ratio measurement main frame.The simple in construction of measurement apparatus in the present invention, low cost, measurement result are stable, can measurement space polarized light extinction ratio, the polarized light extinction ratio in optical fiber can be measured again.
Description
Technical field
The present invention relates to spatial polarization light extinction ratio measurement field, be specifically related to a kind of space inclined
Shake light extinction ratio measurement device and method.
Background technology
PER (Polarization Extinction Ration, polarization extinction ratio) refers to along polarization main
Magnitude relationship between two orthogonal polarization components of state Directional Decomposition, for light source, delustring
Ratio is the highest, and output light is closer to line polarized light.For polariser, extinction ratio is the highest, will
The ability that input light becomes line polarized light is the strongest.For polarization maintaining optical fibre couples, extinction ratio is to use
Characterize Rhizoma Nelumbinis when polarized light is coupled to various components and parts and close quality, in coupling process, few
The polarized light intensity of amount is inevitably in non-incidence axially, and this is referred to as polarization cross pair
Words effect, extinction ratio is just used to quantify it.Extinction ratio is the biggest, and it is the best that Rhizoma Nelumbinis closes quality.
The measurement of extinction ratio characterisitic parameter mainly uses rotatable polarizer method, it is assumed that disappearing of polariser
Light ratio is sufficiently high, more than the extinction ratio of light source, and can rotate continuously.When rising of polariser
Folk prescription is in time overlapping with input light polarization main state direction, and the peak power that energy meter detects is
Pmax；When polariser be polarized direction with input light polarization main state direction orthogonal time, energy meter visit
The minimum power measured is Pmin, such polarization extinction ratio just can be calculated by following formula:
Wherein, PER is polarization extinction ratio, PmaxIt is peak power, PminIt it is minimum power.
Research worker has carried out numerous studies, the light of integration to extinction ratio test device both at home and abroad
Source and the highest extinction ratio tester commercialization of automaticity, commonly used lenticule and
The elements such as optical fiber collimator, adjust light path and fix, and light source and tester are equipped with mark
The two ends of tested optical fiber are inserted flexible jumper, are received light source and survey by the accurate joints of optical fibre
On examination instrument, directly displaying out extinction ratio the most on a display screen, polariser rotates one week, permissible
Record four maximums of extinction ratio, and the polarizer angles at adjacent two maximum places is mutual
Vertically, these angles are exactly fast axle and the position of slow axis of polarization-maintaining fiber.Americanologist
By photoelectricity, OZ Optics company of Canada, fiberpro company of Korea S, Japan's santec public affairs
There is this series products in department, but, the price of this series products is much more expensive, is not easy to make on a large scale
With；Further, the extinction ratio test instrunment that these companies produce can only be to the polarization in polarization maintaining optical fibre
Light carries out extinction ratio measurement, if the extinction ratio of light source to be measured, then have to be sent by light source
Polarized light import in polarization maintaining optical fibre, its extinction ratio could be measured, thus limit
The application of these instruments；Additionally, the accuracy of these products is vulnerable to the cutting matter of fiber end face
The impact of the tightness of amount, focal position and clamping, measurement result is unstable.
Summary of the invention
The invention aims to overcome the deficiency of above-mentioned background technology, it is provided that a kind of space
Polarized light extinction ratio measurement device and method, the simple in construction of measurement apparatus, low cost, measurement
Result is stable, can measurement space polarized light extinction ratio, the polarized light can measured in optical fiber again disappears
Light ratio.
The present invention provides a kind of spatial polarization light extinction ratio measurement device, including optical branching device,
Measuring light power system, extinction ratio measurement system, signal processing system and data-interface display are
System, optical branching device is connected with measuring light power system, extinction ratio measurement system respectively, luminous power
Measurement system, extinction ratio measurement system are all connected with signal processing system, signal processing system with
Data-interface display system is connected, and described measuring light power system includes that be sequentially connected first gathers
Focus lens, the first optical-electrical converter, the first signal amplifier, the first A/D converter, institute
State extinction ratio measurement system and include that rotatable polariser, the second condenser lens, the second photoelectricity turn
Parallel operation, secondary signal amplifier, the second A/D converter, motor and electric machine controller, partially
Shake device, the second condenser lens, the second optical-electrical converter, secondary signal amplifier, the 2nd A/D
Transducer is sequentially connected, and the control end of polariser is connected with motor, motor and electric machine controller phase
Even；
Described optical branching device, the first condenser lens, the first optical-electrical converter, polariser, second
Condenser lens, the second optical-electrical converter and motor are respectively positioned on extinction ratio measurement probe, the first letter
Number amplifier, the first A/D converter, secondary signal amplifier, the second A/D converter,
Electric machine controller, signal processing system and data interface display system are respectively positioned on extinction ratio measurement master
On machine, extinction ratio measurement probe separates with extinction ratio measurement main frame；
Described signal processing system includes that micro-arithmetical unit, power-supply controller of electric and data of processing store
Device, power-supply controller of electric, data storage all with micro-process arithmetical unit be connected, micro-process arithmetical unit
It is connected with the first A/D converter, the second A/D converter, electric machine controller the most respectively；
Described data-interface display system include Organic Light Emitting Diode OLED display, by
Key and various general-purpose interface, OLED display, button, various general-purpose interface all with micro-process
Arithmetical unit is connected；
Polarized light to be measured is divided into two bundle polarized light to be measured, a branch of polarized light to be measured by optical branching device
Entering measuring light power system, the most a branch of polarized light to be measured enters extinction ratio measurement system；
A branch of polarized light to be measured enters measuring light power system, focuses on laggard through the first condenser lens
Entering the first optical-electrical converter, polarized light to be measured is converted to the signal of telecommunication by the first optical-electrical converter, electricity
Signal enters the first signal amplifier, and the signal of telecommunication is amplified by the first signal amplifier, after amplification
The signal of telecommunication enters the first A/D converter, and the signal of telecommunication after the first A/D converter will amplify turns
Be changed to digital signal, in digital signal entering signal processing system micro-process arithmetical unit, micro-place
Reason obtains the luminous power of polarized light to be measured by detecting the size of the signal of telecommunication arithmetical unit；
The most a branch of polarized light to be measured enters extinction ratio measurement system, initially enters according to a constant speed
In the polariser that rate rotates, this polarized light to be measured is decomposed into transmission light o light and transmission by polariser
Light this two-beam of e light, transmission light e light enters the second photoelectricity after the second condenser lens focuses on and turns
Parallel operation, transmission light e light is converted into the signal of telecommunication by the second optical-electrical converter, the second optical-electrical converter
The signal of telecommunication of output enters secondary signal amplifier, and this signal of telecommunication is put by secondary signal amplifier
Greatly, the signal of telecommunication after amplification enters the second A/D converter, and the second A/D converter will amplify
After the signal of telecommunication be converted to digital signal, the micro-process in digital signal entering signal processing system
Arithmetical unit, arithmetical unit is measured transmission light e light by detecting the size of the signal of telecommunication in micro-process
Light intensity；Micro-process controls electric machine controller, motor controller controls motor, motor control arithmetical unit
Polariser processed is rotated by the speed of given pace, and the time rotated a circle with motor is a cycle,
Extinction ratio measurement system measures the power of transmission light e light four extreme values within a cycle: two
Individual maximum and two minimums, and the polarizer angles at adjacent two maximum places hangs down mutually
Directly, arithmetical unit is passed through extinction ratio formula in micro-process, obtains the extinction ratio of polarized light to be measured.
On the basis of technique scheme, described extinction ratio measurement system uses pulse code
Formula, closed loop feedback control, and according to the variation tendency of the extinction ratio measured in real time, adjust polariser
Direction of rotation, the descending progressively fine tuning of regulation of the anglec of rotation, when polariser rise folk prescription
In time overlapping with input light polarization main state direction, extinction ratio measurement system detects transmission light e light
Peak power Pmax；When polariser be polarized direction with input light polarization main state direction orthogonal time,
Extinction ratio measurement system detects the minimum power P of transmission light e lightmin, the most micro-process computing
Device passes through formulaCalculate the extinction ratio of polarized light to be measured, wherein, PER
It is polarization extinction ratio, PmaxIt is the peak power of transmission light e light, PminBe transmission light e light
Small-power.
On the basis of technique scheme, solid between described optical branching device and polarized light to be measured
Surely there is end optical fiber flange plate.
On the basis of technique scheme, described motor is servomotor or motor.
On the basis of technique scheme, the motor in described extinction ratio measurement system is real
Heart rotating shaft electric motor or hollow rotating shaft motor.
On the basis of technique scheme, the motor in described extinction ratio measurement system is real
During heart rotating shaft electric motor, the polariser in extinction ratio measurement system is fixed on extinction ratio by bearing and surveys
On the shell of amount probe, polariser can carry out 360 ° of rotations around the central shaft of extinction ratio measurement probe
Turning, polariser includes polarizing prism and polarizing prism support, and polarizing prism is fixed on polarizing prism
On support；The second optical-electrical converter in extinction ratio measurement system is fixed on extinction ratio measurement probe
Shell on；It is fixed with driving gear on the main shaft of solid spindle motor, polariser is fixed with
The driven gear mated with driving gear, passes through driving tooth between solid spindle motor and polariser
Wheel and the engaged transmission of driven gear；Solid spindle motor rotates, and drives driving gear to rotate；
Driving gear rotates, and drives driven gear to rotate；Driven gear rotates, and drives polariser to rotate；
Extinction ratio measurement system measures peak power and the minimum power of transmission light e light, micro-process computing
The extinction ratio of polarized light to be measured obtained by device.
On the basis of technique scheme, the motor in described extinction ratio measurement system is empty
During spindle motor, the second optical-electrical converter in extinction ratio measurement system is fixed on extinction ratio measurement
On the shell of probe, hollow shaft motor includes that hollow axle, polariser are fixed on hollow shaft motor
The inside of hollow axle one end, the second optical-electrical converter is fixed on the other end of hollow axle, hollow axle
Inside being provided with baffle plate, polariser is fixed by the baffle plate in hollow axle, hollow axle by bearing with
Hollow shaft motor is connected；Hollow axle rotates, and drives polariser to rotate, and extinction ratio measurement system is surveyed
Going out peak power and the minimum power of transmission light e light, arithmetical unit is obtained polarized light to be measured in micro-process
Extinction ratio.
The present invention also provides for a kind of spatial polarization light extinction ratio measurement based on above-mentioned measurement apparatus
Method, comprises the following steps:
Polarized light to be measured is divided into two bundle polarized light to be measured, a branch of polarized light to be measured by optical branching device
Entering measuring light power system, the most a branch of polarized light to be measured enters extinction ratio measurement system；
A branch of polarized light to be measured enters measuring light power system, focuses on laggard through the first condenser lens
Entering the first optical-electrical converter, polarized light to be measured is converted to the signal of telecommunication by the first optical-electrical converter, electricity
Signal enters the first signal amplifier, and the signal of telecommunication is amplified by the first signal amplifier, after amplification
The signal of telecommunication enters the first A/D converter, and the signal of telecommunication after the first A/D converter will amplify turns
Be changed to digital signal, in digital signal entering signal processing system micro-process arithmetical unit, micro-place
Reason obtains the luminous power of polarized light to be measured by detecting the size of the signal of telecommunication arithmetical unit；
The most a branch of polarized light to be measured enters extinction ratio measurement system, initially enters according to a constant speed
In the polariser that rate rotates, this polarized light to be measured is decomposed into transmission light o light and transmission by polariser
Light this two-beam of e light, transmission light e light enters the second photoelectricity after the second condenser lens focuses on and turns
Parallel operation, transmission light e light is converted into the signal of telecommunication by the second optical-electrical converter, the second optical-electrical converter
The signal of telecommunication of output enters secondary signal amplifier, and this signal of telecommunication is put by secondary signal amplifier
Greatly, the signal of telecommunication after amplification enters the second A/D converter, and the second A/D converter will amplify
After the signal of telecommunication be converted to digital signal, the micro-process in digital signal entering signal processing system
Arithmetical unit, arithmetical unit is measured transmission light e light by detecting the size of the signal of telecommunication in micro-process
Light intensity；Micro-process controls electric machine controller, motor controller controls motor, motor control arithmetical unit
Polariser processed is rotated by the speed of given pace, and the time rotated a circle with motor is a cycle,
Extinction ratio measurement system measures the power of transmission light e light four extreme values within a cycle: two
Individual maximum and two minimums, and the polarizer angles at adjacent two maximum places hangs down mutually
Directly, arithmetical unit is passed through extinction ratio formula in micro-process, obtains the extinction ratio of polarized light to be measured.
On the basis of technique scheme, described extinction ratio measurement system uses pulse code
Formula, closed loop feedback control, and according to the variation tendency of the extinction ratio measured in real time, adjust polariser
Direction of rotation, the descending progressively fine tuning of regulation of the anglec of rotation, when polariser rise folk prescription
In time overlapping with input light polarization main state direction, extinction ratio measurement system detects transmission light e light
Peak power Pmax；When polariser be polarized direction with input light polarization main state direction orthogonal time,
Extinction ratio measurement system detects the minimum power P of transmission light e lightmin, the most micro-process computing
Device passes through formulaCalculate the extinction ratio of polarized light to be measured, wherein, PER
It is polarization extinction ratio, PmaxIt is the peak power of transmission light e light, PminBe transmission light e light
Small-power.
On the basis of technique scheme, the motor in described extinction ratio measurement system is real
Heart rotating shaft electric motor or hollow rotating shaft motor；
When motor in described extinction ratio measurement system is solid spindle motor, extinction ratio measurement system
Polariser in system is fixed on the shell of extinction ratio measurement probe by bearing, and polariser can be around
The central shaft of extinction ratio measurement probe carries out 360 ° of rotations, and polariser includes polarizing prism and polarization
Prism bracket, polarizing prism is fixed on polarizing prism support；In extinction ratio measurement system
Two optical-electrical converters are fixed on the shell of extinction ratio measurement probe；The main shaft of solid spindle motor
On be fixed with driving gear, polariser is fixed with the driven gear mated with driving gear, real
By driving gear and the engaged transmission of driven gear between heart rotating shaft electric motor and polariser；Solid
Rotating shaft electric motor rotates, and drives driving gear to rotate；Driving gear rotates, and drives driven gear rotation
Turn；Driven gear rotates, and drives polariser to rotate；Extinction ratio measurement system measures transmission light e
The peak power of light and minimum power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit；
When motor in described extinction ratio measurement system is hollow shaft motor, extinction ratio measurement system
In the second optical-electrical converter be fixed on extinction ratio measurement probe shell on, hollow shaft motor bag
Including hollow axle, polariser is fixed on the inside of hollow axle one end of hollow shaft motor, the second photoelectricity
Transducer is fixed on the other end of hollow axle, is provided with baffle plate in hollow axle, and polariser is by sky
Baffle plate in mandrel is fixed, and hollow axle is connected with hollow shaft motor by bearing；Hollow axle rotates,
Drive polariser rotates, and extinction ratio measurement system measures peak power and the minimum of transmission light e light
Power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit.
Compared with prior art, advantages of the present invention is as follows:
The measurement apparatus of the present invention uses the structure that extinction ratio measurement probe separates with main frame, first
Rotatable polarizer method is applied to the measurement of space extinction ratio, and extinction ratio measurement probe can be random
Movable, it is simple to measuring the extinction ratio of the spatial polarization light of different places, this measurement apparatus has knot
The advantages such as structure is simple, low cost, measurement result are stable, can either the disappearing of measurement space polarized light
Light ratio, can measure again the extinction ratio of polarized light in optical fiber.
Accompanying drawing explanation
Fig. 1 is the theory diagram of space polarized light extinction ratio measurement device in the embodiment of the present invention.
Fig. 2 is that in embodiment 1, the motor of measurement apparatus is master during common solid spindle motor
View.
Fig. 3 is that in embodiment 2, the motor of measurement apparatus is left view during hollow shaft motor.
Fig. 4 is that in embodiment 2, the motor of measurement apparatus is profile during hollow shaft motor.
Reference: the shell of 1-extinction ratio measurement probe, 2-driving gear, 3-solid spindle
Motor, 4-driven gear, 5-polariser, 6-baffle plate, 7-hollow axle, 8-the second opto-electronic conversion
Device, 9-hollow shaft motor.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of spatial polarization light extinction ratio measurement dress
Put, including optical branching device, measuring light power system, extinction ratio measurement system, signal processing system
System and data interface display system, optical branching device is surveyed with measuring light power system, extinction ratio respectively
Amount system be connected, measuring light power system, extinction ratio measurement system all with signal processing system phase
Even, signal processing system is connected with data-interface display system.
Shown in Figure 1, the first condenser lens that measuring light power system includes being sequentially connected,
First optical-electrical converter, the first signal amplifier, the first A/D converter, extinction ratio measurement
System includes rotatable polariser, the second condenser lens, the second optical-electrical converter, the second letter
Number amplifier, the second A/D converter, motor and electric machine controller, polariser, second gather
Focus lens, the second optical-electrical converter, secondary signal amplifier, the second A/D converter are sequentially
It is connected.The control end of polariser is connected with motor, and motor is connected with electric machine controller.This motor
Both can be servomotor, it is also possible to be common motor；This motor both can be common
Solid spindle motor, it is also possible to be hollow rotating shaft motor.
Shown in Figure 1, optical branching device, the first condenser lens, the first optical-electrical converter, partially
Shake device, the second condenser lens, the second optical-electrical converter and motor be respectively positioned on extinction ratio measurement probe
On, the first signal amplifier, the first A/D converter, secondary signal amplifier, the 2nd A/D
Transducer, electric machine controller, signal processing system and data interface display system are respectively positioned on delustring
Than measuring on main frame, extinction ratio measurement probe separates with extinction ratio measurement main frame.
A dismountable end optical fiber flange plate can be fixed between optical branching device and polarized light to be measured,
It is easy to the extinction ratio of polarized light in detection fiber.
Shown in Figure 1, signal processing system include micro-process arithmetical unit, power-supply controller of electric and
Data storage, power-supply controller of electric, data storage all with micro-process arithmetical unit be connected, micro-place
Reason arithmetical unit the most respectively with the first A/D converter, the second A/D converter, electric machine controller
It is connected.Data-interface display system include OLED (Organic Light-Emitting Diode,
Organic Light Emitting Diode) display, button and various general-purpose interface, OLED display, press
Key, various general-purpose interface are all connected with micro-process arithmetical unit.
The embodiment of the present invention also provides for a kind of spatial polarization light delustring based on above-mentioned measurement apparatus
Ratio measuring method, comprises the following steps:
Polarized light to be measured is divided into two bundle polarized light to be measured, a branch of polarized light to be measured by optical branching device
Entering measuring light power system, the most a branch of polarized light to be measured enters extinction ratio measurement system；
A branch of polarized light to be measured enters measuring light power system, focuses on laggard through the first condenser lens
Entering the first optical-electrical converter, polarized light to be measured is converted to the signal of telecommunication by the first optical-electrical converter, electricity
Signal enters the first signal amplifier, and the signal of telecommunication is amplified by the first signal amplifier, after amplification
The signal of telecommunication enters the first A/D converter, and the signal of telecommunication after the first A/D converter will amplify turns
Be changed to digital signal, in digital signal entering signal processing system micro-process arithmetical unit, micro-place
Reason obtains the luminous power of polarized light to be measured by detecting the size of the signal of telecommunication arithmetical unit；
The most a branch of polarized light to be measured enters extinction ratio measurement system, initially enters according to a constant speed
In the polariser that rate rotates, this polarized light to be measured is decomposed into transmission light o light and transmission by polariser
Light this two-beam of e light, transmission light e light enters the second photoelectricity after the second condenser lens focuses on and turns
Parallel operation, transmission light e light is converted into the signal of telecommunication by the second optical-electrical converter, the second optical-electrical converter
The signal of telecommunication of output enters secondary signal amplifier, and this signal of telecommunication is put by secondary signal amplifier
Greatly, the signal of telecommunication after amplification enters the second A/D converter, and the second A/D converter will amplify
After the signal of telecommunication be converted to digital signal, the micro-process in digital signal entering signal processing system
Arithmetical unit, arithmetical unit is measured transmission light e light by detecting the size of the signal of telecommunication in micro-process
Light intensity, the size of the signal of telecommunication is directly proportional to the intensity of light.Micro-process controls motor control arithmetical unit
Device, motor controller controls motor, motor controls polariser and rotates by the speed of given pace,
The time rotated a circle with motor is a cycle, and extinction ratio measurement system measures transmission light e light
Power has four extreme values within a cycle: two maximum and two minimums, and adjacent two
The polarizer angles at individual maximum place is orthogonal, and micro-process is public by extinction ratio for arithmetical unit
Formula, obtains the extinction ratio of polarized light to be measured.
Extinction ratio measurement system uses pulse code formula, closed loop feedback to control, according to measuring in real time
The variation tendency of extinction ratio, adjust the direction of rotation of polariser, the regulation of the anglec of rotation is by greatly
To little progressively fine tuning, when polariser be polarized direction overlap with input light polarization main state direction time,
Extinction ratio measurement system detects peak power P of transmission light e lightmax；When being polarized of polariser
When direction is orthogonal with input light polarization main state direction, extinction ratio measurement system detects transmission light e
The minimum power P of lightmin, arithmetical unit is passed through formula in the most micro-processMeter
Calculating the extinction ratio of polarized light to be measured, wherein, PER is polarization extinction ratio, PmaxIt is transmission light
The peak power of e light, PminIt it is the minimum power of transmission light e light.
The principle of the embodiment of the present invention is described below:
The Main Function of the first condenser lens is: polarized light to be measured gathers the most afterwards from optical branching device
Jiao, preferably acts on the first optical-electrical converter.Because the acceptance of the first opto-electronic conversion front end
Area comparison is little, in order to measure luminous power more accurately, so needing at optical branching device and first
The first condenser lens is arranged between optical-electrical converter.
The Main Function of the second condenser lens is: polarized light to be measured focuses on the most afterwards from polariser,
Preferably act on the second optical-electrical converter.Because the receptor area of the second opto-electronic conversion front end
Smaller, in order to measure light intensity more accurately, so needing in polariser and the second opto-electronic conversion
The second condenser lens is arranged between device.
Electric machine controller is exactly the drive circuit of motor, and micro-process is controlled by voltage arithmetical unit
Drive circuit, drive circuit by change the frequency of electric pulse, the rotating speed of amplitude controlling motor,
Then motor gives micro-process arithmetical unit one feedback signal again, by certain algorithm, near disappearing
When light is than extreme value, the rotating speed of motor is made to taper into by controlling electric machine controller, until delustring
Compare extreme value.Also the descending progressively fine tuning of regulation of the polariser anglec of rotation it is achieved that.
Use by motor separately below and carry out as a example by common solid spindle motor, hollow shaft motor
Explanation.
Embodiment 1: motor is common solid spindle motor
Shown in Figure 2, polariser in extinction ratio measurement system 5 is fixed on by bearing and disappears
Light ratio is on the shell 1 of measuring probe, and polariser 5 can enter around the central shaft of extinction ratio measurement probe
Row 360 ° rotation.Polariser 5 includes polarizing prism and polarizing prism support, and polarizing prism is fixed
On polarizing prism support.Motor in extinction ratio measurement system uses common solid spindle electricity
Machine 3, both can pass through gear drive between solid spindle motor 3 and polariser 5, it is also possible to
Pass through belt transmission.The second optical-electrical converter in extinction ratio measurement system is fixed on extinction ratio and surveys
On the shell 1 of amount probe, it is not integrally fixed on polariser 5, so Fig. 2 does not draws second
Optical-electrical converter.
Shown in Figure 2, embodiment 1 is fixed with on the main shaft of solid spindle motor 3 actively
Gear 2, polariser 5 is fixed with the driven gear 4 mated with driving gear 2, solid turn
By driving gear 2 and the engaged transmission of driven gear 4 between spindle motor 3 and polariser 5.
Solid spindle motor 3 rotates, and drives driving gear 2 to rotate；Driving gear 2 rotates,
Driven gear 4 is driven to rotate；Driven gear 4 rotates, and drives polariser 5 to rotate.Extinction ratio
Measurement system measures peak power and the minimum power of transmission light e light, and micro-process is obtained arithmetical unit
The extinction ratio of polarized light to be measured.
Embodiment 2: motor is hollow shaft motor
Seeing shown in Fig. 3, Fig. 4, the second optical-electrical converter 8 in extinction ratio measurement system is solid
It is scheduled on the shell of extinction ratio measurement probe, is not integrally fixed on polariser 5, so the second light
Electric transducer 8 is unsettled.Motor in extinction ratio measurement system uses hollow shaft motor 9, hollow
Spindle motor 9 includes hollow axle 7 (i.e. the rotor of hollow shaft motor 9), and polariser 5 is fixed on
The inside of hollow axle 7 one end of hollow shaft motor 9, the second optical-electrical converter 8 is fixed on hollow
The other end of axle 7, is provided with baffle plate 6 in hollow axle 7, polariser 5 is by hollow axle 7
Baffle plate 6 fix, hollow axle 7 is connected with hollow shaft motor 9 by bearing.
Polariser 5 is fixed on hollow axle 7, hollow axle 7 (i.e. the rotor of hollow shaft motor 9)
Rotating, drive polariser 5 to rotate, extinction ratio measurement system measures the maximum work of transmission light e light
Rate and minimum power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if
If these amendment and modification within the scope of the claims in the present invention and equivalent technologies thereof, then this
A little amendments and modification are also within protection scope of the present invention.
The prior art that the content not described in detail in description is known to the skilled person.
Claims (6)
1. a spatial polarization light extinction ratio measurement device, surveys including optical branching device, luminous power
Amount system, extinction ratio measurement system, signal processing system and data interface display system, light divides
Road device is connected with measuring light power system, extinction ratio measurement system respectively, measuring light power system,
Extinction ratio measurement system is all connected with signal processing system, and signal processing system shows with data-interface
Show that system is connected, it is characterised in that: described measuring light power system includes first be sequentially connected
Condenser lens, the first optical-electrical converter, the first signal amplifier, the first A/D converter,
Described extinction ratio measurement system includes rotatable polariser, the second condenser lens, the second photoelectricity
Transducer, secondary signal amplifier, the second A/D converter, motor and electric machine controller,
Polariser, the second condenser lens, the second optical-electrical converter, secondary signal amplifier, second
A/D converter is sequentially connected, and the control end of polariser is connected with motor, and motor controls with motor
Device is connected；
Described optical branching device, the first condenser lens, the first optical-electrical converter, polariser, second
Condenser lens, the second optical-electrical converter and motor are respectively positioned on extinction ratio measurement probe, the first letter
Number amplifier, the first A/D converter, secondary signal amplifier, the second A/D converter,
Electric machine controller, signal processing system and data interface display system are respectively positioned on extinction ratio measurement master
On machine, extinction ratio measurement probe separates with extinction ratio measurement main frame；
Described signal processing system includes that micro-arithmetical unit, power-supply controller of electric and data of processing store
Device, power-supply controller of electric, data storage all with micro-process arithmetical unit be connected, micro-process arithmetical unit
It is connected with the first A/D converter, the second A/D converter, electric machine controller the most respectively；
Described data-interface display system include Organic Light Emitting Diode OLED display, by
Key and various general-purpose interface, OLED display, button, various general-purpose interface all with micro-process
Arithmetical unit is connected；
Polarized light to be measured is divided into two bundle polarized light to be measured, a branch of polarized light to be measured by optical branching device
Entering measuring light power system, the most a branch of polarized light to be measured enters extinction ratio measurement system；
A branch of polarized light to be measured enters measuring light power system, focuses on laggard through the first condenser lens
Entering the first optical-electrical converter, polarized light to be measured is converted to the signal of telecommunication by the first optical-electrical converter, electricity
Signal enters the first signal amplifier, and the signal of telecommunication is amplified by the first signal amplifier, after amplification
The signal of telecommunication enters the first A/D converter, and the signal of telecommunication after the first A/D converter will amplify turns
Be changed to digital signal, in digital signal entering signal processing system micro-process arithmetical unit, micro-place
Reason obtains the luminous power of polarized light to be measured by detecting the size of the signal of telecommunication arithmetical unit；
The most a branch of polarized light to be measured enters extinction ratio measurement system, initially enters according to a constant speed
In the polariser that rate rotates, this polarized light to be measured is decomposed into transmission light o light and transmission by polariser
Light this two-beam of e light, transmission light e light enters the second photoelectricity after the second condenser lens focuses on and turns
Parallel operation, transmission light e light is converted into the signal of telecommunication by the second optical-electrical converter, the second optical-electrical converter
The signal of telecommunication of output enters secondary signal amplifier, and this signal of telecommunication is put by secondary signal amplifier
Greatly, the signal of telecommunication after amplification enters the second A/D converter, and the second A/D converter will amplify
After the signal of telecommunication be converted to digital signal, the micro-process in digital signal entering signal processing system
Arithmetical unit, arithmetical unit is measured transmission light e light by detecting the size of the signal of telecommunication in micro-process
Light intensity；Micro-process controls electric machine controller, motor controller controls motor, motor control arithmetical unit
Polariser processed is rotated by the speed of given pace, and the time rotated a circle with motor is a cycle,
Extinction ratio measurement system measures the power of transmission light e light four extreme values within a cycle: two
Individual maximum and two minimums, and the polarizer angles at adjacent two maximum places hangs down mutually
Directly, arithmetical unit is passed through extinction ratio formula in micro-process, obtains the extinction ratio of polarized light to be measured；
Motor in extinction ratio measurement system is solid spindle motor or hollow rotating shaft motor；
When motor in described extinction ratio measurement system is solid spindle motor, extinction ratio measurement system
Polariser in system is fixed on the shell of extinction ratio measurement probe by bearing, and polariser can be around
The central shaft of extinction ratio measurement probe carries out 360 ° of rotations, and polariser includes polarizing prism and polarization
Prism bracket, polarizing prism is fixed on polarizing prism support；In extinction ratio measurement system
Two optical-electrical converters are fixed on the shell of extinction ratio measurement probe；The main shaft of solid spindle motor
On be fixed with driving gear, polariser is fixed with the driven gear mated with driving gear, real
By driving gear and the engaged transmission of driven gear between heart rotating shaft electric motor and polariser；Solid
Rotating shaft electric motor rotates, and drives driving gear to rotate；Driving gear rotates, and drives driven gear rotation
Turn；Driven gear rotates, and drives polariser to rotate；Extinction ratio measurement system measures transmission light e
The peak power of light and minimum power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit；
When motor in described extinction ratio measurement system is hollow shaft motor, extinction ratio measurement system
In the second optical-electrical converter be fixed on extinction ratio measurement probe shell on, hollow shaft motor bag
Including hollow axle, polariser is fixed on the inside of hollow axle one end of hollow shaft motor, the second photoelectricity
Transducer is fixed on the other end of hollow axle, is provided with baffle plate in hollow axle, and polariser is by sky
Baffle plate in mandrel is fixed, and hollow axle is connected with hollow shaft motor by bearing；Hollow axle rotates,
Drive polariser rotates, and extinction ratio measurement system measures peak power and the minimum of transmission light e light
Power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit.
2. spatial polarization light extinction ratio measurement device as claimed in claim 1, its feature exists
In: described extinction ratio measurement system uses pulse code formula, closed loop feedback to control, according in real time
The variation tendency of the extinction ratio measured, adjusts the direction of rotation of polariser, the regulation of the anglec of rotation
Descending progressively fine tuning, when the direction that is polarized of polariser overlaps with input light polarization main state direction
Time, extinction ratio measurement system detects peak power P of transmission light e lightmax；When polariser
Be polarized direction with input light polarization main state direction orthogonal time, extinction ratio measurement system detects transmission
The minimum power P of light e lightmin, arithmetical unit is passed through formula in the most micro-process
Calculating the extinction ratio of polarized light to be measured, wherein, PER is polarization extinction ratio, PmaxIt it is transmission
The peak power of light e light, PminIt it is the minimum power of transmission light e light.
3. spatial polarization light extinction ratio measurement device as claimed in claim 1, its feature exists
In: it is fixed with end optical fiber flange plate between described optical branching device and polarized light to be measured.
4. spatial polarization light extinction ratio measurement device as claimed in claim 1, its feature exists
In: described motor is servomotor or motor.
5. spatial polarization light based on measurement apparatus according to any one of Claims 1-4 disappears
Light ratio measuring method, it is characterised in that comprise the following steps:
Polarized light to be measured is divided into two bundle polarized light to be measured, a branch of polarized light to be measured by optical branching device
Entering measuring light power system, the most a branch of polarized light to be measured enters extinction ratio measurement system；
A branch of polarized light to be measured enters measuring light power system, focuses on laggard through the first condenser lens
Entering the first optical-electrical converter, polarized light to be measured is converted to the signal of telecommunication by the first optical-electrical converter, electricity
Signal enters the first signal amplifier, and the signal of telecommunication is amplified by the first signal amplifier, after amplification
The signal of telecommunication enters the first A/D converter, and the signal of telecommunication after the first A/D converter will amplify turns
Be changed to digital signal, in digital signal entering signal processing system micro-process arithmetical unit, micro-place
Reason obtains the luminous power of polarized light to be measured by detecting the size of the signal of telecommunication arithmetical unit；
The most a branch of polarized light to be measured enters extinction ratio measurement system, initially enters according to a constant speed
In the polariser that rate rotates, this polarized light to be measured is decomposed into transmission light o light and transmission by polariser
Light this two-beam of e light, transmission light e light enters the second photoelectricity after the second condenser lens focuses on and turns
Parallel operation, transmission light e light is converted into the signal of telecommunication by the second optical-electrical converter, the second optical-electrical converter
The signal of telecommunication of output enters secondary signal amplifier, and this signal of telecommunication is put by secondary signal amplifier
Greatly, the signal of telecommunication after amplification enters the second A/D converter, and the second A/D converter will amplify
After the signal of telecommunication be converted to digital signal, the micro-process in digital signal entering signal processing system
Arithmetical unit, arithmetical unit is measured transmission light e light by detecting the size of the signal of telecommunication in micro-process
Light intensity；Micro-process controls electric machine controller, motor controller controls motor, motor control arithmetical unit
Polariser processed is rotated by the speed of given pace, and the time rotated a circle with motor is a cycle,
Extinction ratio measurement system measures the power of transmission light e light four extreme values within a cycle: two
Individual maximum and two minimums, and the polarizer angles at adjacent two maximum places hangs down mutually
Directly, arithmetical unit is passed through extinction ratio formula in micro-process, obtains the extinction ratio of polarized light to be measured；
Motor in extinction ratio measurement system is solid spindle motor or hollow rotating shaft motor；
When motor in described extinction ratio measurement system is solid spindle motor, extinction ratio measurement system
Polariser in system is fixed on the shell of extinction ratio measurement probe by bearing, and polariser can be around
The central shaft of extinction ratio measurement probe carries out 360 ° of rotations, and polariser includes polarizing prism and polarization
Prism bracket, polarizing prism is fixed on polarizing prism support；In extinction ratio measurement system
Two optical-electrical converters are fixed on the shell of extinction ratio measurement probe；The main shaft of solid spindle motor
On be fixed with driving gear, polariser is fixed with the driven gear mated with driving gear, real
By driving gear and the engaged transmission of driven gear between heart rotating shaft electric motor and polariser；Solid
Rotating shaft electric motor rotates, and drives driving gear to rotate；Driving gear rotates, and drives driven gear rotation
Turn；Driven gear rotates, and drives polariser to rotate；Extinction ratio measurement system measures transmission light e
The peak power of light and minimum power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit；
When motor in described extinction ratio measurement system is hollow shaft motor, extinction ratio measurement system
In the second optical-electrical converter be fixed on extinction ratio measurement probe shell on, hollow shaft motor bag
Including hollow axle, polariser is fixed on the inside of hollow axle one end of hollow shaft motor, the second photoelectricity
Transducer is fixed on the other end of hollow axle, is provided with baffle plate in hollow axle, and polariser is by sky
Baffle plate in mandrel is fixed, and hollow axle is connected with hollow shaft motor by bearing；Hollow axle rotates,
Drive polariser rotates, and extinction ratio measurement system measures peak power and the minimum of transmission light e light
Power, the extinction ratio of polarized light to be measured is obtained in micro-process arithmetical unit.
6. spatial polarization light measurement method for extinction ratio as claimed in claim 5, its feature exists
In: described extinction ratio measurement system uses pulse code formula, closed loop feedback to control, according in real time
The variation tendency of the extinction ratio measured, adjusts the direction of rotation of polariser, the regulation of the anglec of rotation
Descending progressively fine tuning, when the direction that is polarized of polariser overlaps with input light polarization main state direction
Time, extinction ratio measurement system detects peak power P of transmission light e lightmax；When polariser
Be polarized direction with input light polarization main state direction orthogonal time, extinction ratio measurement system detects transmission
The minimum power P of light e lightmin, arithmetical unit is passed through formula in the most micro-process
Calculating the extinction ratio of polarized light to be measured, wherein, PER is polarization extinction ratio, PmaxIt it is transmission
The peak power of light e light, PminIt it is the minimum power of transmission light e light.
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| CN106596071A (en) * | 2016-12-27 | 2017-04-26 | 镇江奥菲特光电科技有限公司 | Control system of extinction ratio tester |
| CN107800492A (en) * | 2017-12-13 | 2018-03-13 | 武汉电信器件有限公司 | A kind of device and method of automatic test silicon light coherent receiver polarization extinction ratio |
| CN113176077B (en) * | 2021-04-28 | 2023-02-17 | 天津工业大学 | Extinction ratio measuring system based on rotary analyzer |
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