CN106877124A - Nanosecond optical fiber green (light) laser - Google Patents
Nanosecond optical fiber green (light) laser Download PDFInfo
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- CN106877124A CN106877124A CN201710054380.0A CN201710054380A CN106877124A CN 106877124 A CN106877124 A CN 106877124A CN 201710054380 A CN201710054380 A CN 201710054380A CN 106877124 A CN106877124 A CN 106877124A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
- H01S3/06758—Tandem amplifiers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of nanosecond optical fiber green (light) laser, including laser seed source, multistage pumping source, multistage bundling device, multistage Active Optical Fiber and frequency-doubling crystal, laser seed source sends seed light, multistage pumping source sends multistage pump light, multistage bundling device is connected with the pumping source of corresponding level, multistage Active Optical Fiber is connected with the bundling device of corresponding level, for amplifying to the coupled optical power for receiving, frequency-doubling crystal receives the fundamental frequency light obtained after amplifying through multiple power levels, and carries out process of frequency multiplication to it and obtain green laser；Seed light carry out after pumping closing beam and obtains coupling light, multiple power levels amplification is carried out to the coupling light by multistage Active Optical Fiber, a pumping is carried out when every grade of power amplification is carried out, the power of seed light is further enhanced, green laser is obtained finally by frequency-doubling crystal frequency multiplication；High-quality narrow linewidth, the green laser of single pulse energy high can be obtained, energy conversion efficiency is high.
Description
Technical field
The present invention relates to green laser field, more particularly to a kind of nanosecond optical fiber green (light) laser.
Background technology
Laser is LASER Light Source, laser equipment " engine ", and the performance of laser directly determines the property of light source and equipment
Can, green laser is used widely due to its superior performance.
At present, the acquisition of green laser mainly launches laser by solid state laser, then by nonlinear crystal to this
Laser freuqency doubling is obtained.But existing solid state laser repetition rate is low, energy conversion efficiency is low, it is necessary to using water-cooling structure, knot
Structure is complicated.
The content of the invention
Based on this, it is necessary to provide a kind of nanosecond optical fiber green (light) laser, high-quality narrow linewidth, simple venation high can be obtained
The green laser of energy is rushed, energy conversion efficiency is high.
A kind of nanosecond optical fiber green (light) laser, including：
Laser seed source, for sending seed light；
Multistage pumping source, the pumping source of each rank is used to send the pump light of appropriate level；
Multistage bundling device, the one-level bundling device in the multistage bundling device is used for the seed light and the multistage pumping
The pump light that the one-level pumping source in source sends couple and obtains coupling light, and other bundling devices are used in the multistage bundling device
The pump light that the coupling light that the other bundling device of previous stage is sent sends with the pumping source of corresponding level is coupled；
Multistage Active Optical Fiber, the Active Optical Fiber of each rank is connected with the bundling device of corresponding level, for the coupling to receiving
Closing light carries out power amplification；
Frequency-doubling crystal, receive carries out multiple power levels and puts through the multistage pumping source, multistage bundling device and multistage Active Optical Fiber
The fundamental frequency light obtained after big, and process of frequency multiplication is carried out to the fundamental frequency light obtain green laser.
Above-mentioned nanosecond optical fiber green (light) laser, seed light carry out after pumping closing beam obtaining coupling light, by multistage
Active Optical Fiber carries out multiple power levels amplification to the coupling light, a pumping is carried out when every grade of power amplification is carried out, further
Strengthen the power of seed light, green laser is obtained finally by frequency-doubling crystal；Nanosecond, optical fiber green (light) laser can obtain height
The green laser of the narrow linewidth of quality, single pulse energy high, energy conversion efficiency is high.
Wherein in one embodiment, the laser seed source is distributed feedback laser, the pulsewidth of the seed light
It is 1ns~3ns.
Wherein in one embodiment, the multistage pumping source is three-level pumping source, and multistage bundling device is three-level bundling device,
The multistage Active Optical Fiber is three-level Active Optical Fiber, and the three-level pumping source includes one-level pumping source, diode pumping source and three-level
Pumping source, the multistage bundling device includes one-level bundling device, two grades of bundling devices and three-level bundling device, the three-level Active Optical Fiber bag
One-level Active Optical Fiber, two grades of Active Optical Fibers and three-level Active Optical Fiber are included, the laser seed source and the one-level pumping source are connected
The input of the one-level bundling device, the output end of the one-level bundling device connects the input of the one-level Active Optical Fiber, institute
The output end and the diode pumping source of stating one-level Active Optical Fiber connect the input of two grades of bundling devices, two grades of conjunction beams
The output end of device connects the input of two grades of Active Optical Fibers, and the output end of two grades of Active Optical Fibers connects the three-level to be had
The input of source optical fiber, the output end of the three-level Active Optical Fiber connects the input of the three-level bundling device.
Wherein in one embodiment, the power of the pump light of the one-level pumping source output is 200mW, and wavelength is
974nm, the power of the pump light of the diode pumping source output is 10mW, and wavelength is 15nm, and the three-level pumping source includes two
Individual pumping source, the power of the pump light of each pumping source output is 27mW, and wavelength is 976nm.
Wherein in one embodiment, the one-level bundling device is wavelength division multiplexer, and two grades of bundling devices are (1+1) * 1
Polarization-maintaining bundling device, the three-level bundling device is (2+1) * 1 polarization-maintaining bundling device.
Wherein in one embodiment, the one-level Active Optical Fiber is that the polarization-maintaining of single covering mixes ytterbium Active Optical Fiber, described two
The polarization-maintaining that level Active Optical Fiber and three-level Active Optical Fiber are double clad mixes ytterbium Active Optical Fiber.
Wherein in one embodiment, between the laser seed source and the one-level bundling device, the one-level active light
Polarization-maintaining isolator is provided between fine and two grades of bundling devices.
Wherein in one embodiment, band logical filter is provided between two grades of Active Optical Fibers and the three-level Active Optical Fiber
Ripple device.
Wherein in one embodiment, also including collimater, the collimater receives the fundamental frequency light, and to the fundamental frequency
Light is sent to the frequency-doubling crystal after carrying out collimation treatment, and the spot diameter of the collimater is 0.2mm~0.3mm, the angle of divergence
It is 5mrad~7mrad.
Wherein in one embodiment, also including reflection filtering structure, it is brilliant that the reflection filtering structure receives the frequency multiplication
The green laser of body output, and optical filtering treatment is carried out to the green laser, remove the impurity light in the green laser.
Brief description of the drawings
Fig. 1 is the structural representation of nanosecond optical fiber green (light) laser.
Specific embodiment
Referring to Fig. 1, Fig. 1 is the structural representation of nanosecond optical fiber green (light) laser.
In the present embodiment, nanosecond optical fiber green (light) laser, including laser seed source 10, multistage pumping source, multistage close
Beam device, multistage Active Optical Fiber and frequency-doubling crystal 14.
Laser seed source 10, for sending seed light.
Wherein in one embodiment, the laser seed source 10 is distributed feedback laser, the seed light of its transmitting
Pulsewidth is 1ns~3ns, and the seed light is the laser of narrow linewidth and narrow spaces.
Multistage pumping source, the pumping source of each rank is used to send the pump light of appropriate level.
Multistage bundling device, the one-level bundling device 121 in the multistage bundling device is used for the seed light and the multistage
The pump light that the one-level pumping source 111 of pumping source sends couple and obtains coupling light, other in the multistage bundling device to close
The pump light that coupling light sends with the pumping source of corresponding level that beam device is used to send the other bundling device of previous stage is coupled.
Multistage Active Optical Fiber, the Active Optical Fiber of each rank is connected with the bundling device of corresponding level, for the coupling to receiving
Closing light carries out power amplification.
Wherein in one embodiment, the multistage pumping source is three-level pumping source, and multistage bundling device is three-level bundling device,
The multistage Active Optical Fiber is three-level Active Optical Fiber, and the three-level pumping source includes one-level pumping source 111, diode pumping source 112
With three-level pumping source 113, the multistage bundling device include 121, two grades of bundling devices 122 of one-level bundling device and three-level bundling device 123,
The three-level Active Optical Fiber includes 131, two grades of Active Optical Fibers 132 of one-level Active Optical Fiber and three-level Active Optical Fiber 133, the laser
Seed source 10 and the one-level pumping source 111 connect the input of the one-level bundling device 121, the one-level bundling device 121
Output end connects the input of the one-level Active Optical Fiber 131, the output end and the two stage pump of the one-level Active Optical Fiber 131
Pu source 112 connects the input of two grades of bundling devices 122, and the output end of two grades of bundling devices 122 connects described two grades to be had
The input of source optical fiber 132, the output end of two grades of Active Optical Fibers 132 connects the input of the three-level Active Optical Fiber 133,
The output end of the three-level Active Optical Fiber 133 connects the input of the three-level bundling device 123.
The seed light of the transmitting of laser seed source 10 is needed by three-level power amplification：
One-level is amplified：The pump light that seed light sends with one-level pumping source 111 is coupled, through one-level Active Optical Fiber
131 carry out power amplification after be sent to two grades of bundling devices 122；
Two grades of amplifications：Diode coupler 122 is by the coupling light after carrying out power amplification through one-level Active Optical Fiber 131, and two
The level pump light that sends of pumping source 112 is coupled, and is sent to two grades of Active Optical Fibers 132 and is carried out power amplification；
Three-level is amplified：Three-level Active Optical Fiber 133 will enter traveling one through the coupling light after the power amplification of two grades of Active Optical Fibers 132
Step is amplified, and is sent to three-level bundling device 123, and three-level bundling device 123 is by the coupling light and three-level pumping source of the further amplification
The 113 three-level coupling pump lights for sending.Narrow linewidth, the fundamental frequency light of single pulse energy high are obtained, three-level power amplification is completed.
Frequency-doubling crystal 14, receive carries out multiple power levels through the multistage pumping source, multistage bundling device and multistage Active Optical Fiber
The fundamental frequency light obtained after amplification, and process of frequency multiplication is carried out to the fundamental frequency light obtain green laser.
Seed light obtains narrow linewidth, the fundamental frequency light of single pulse energy high after amplifying through above-mentioned three-level, and the fundamental frequency light is entered
Row process of frequency multiplication can directly obtain narrow linewidth, the green laser of single pulse energy high.
Wherein in one embodiment, the power of the pump light of the output of one-level pumping source 111 is 200mW, and wavelength is
974nm, the power of the pump light of the output of diode pumping source 112 is 10mW, and wavelength is 15nm, and three-level pumping source 113 includes two
Pumping source, the power of the pump light of each pumping source output is 27mW, and wavelength is 976nm.
Wherein in one embodiment, the one-level bundling device 121 is wavelength division multiplexer, and two grades of bundling devices 122 are
(1+1) * 1 polarization-maintaining bundling device, the three-level bundling device 123 is (2+1) * 1 polarization-maintaining bundling device.
Wherein in one embodiment, the one-level Active Optical Fiber 131 is that the polarization-maintaining of single covering mixes ytterbium Active Optical Fiber, two grades
The polarization-maintaining that Active Optical Fiber 132 and three-level Active Optical Fiber 133 are double clad mixes ytterbium Active Optical Fiber, two grades of chis of Active Optical Fiber 132
Very little is 10/120, and core diameter is 10um, and cladding thickness is 120um, and the size of three-level Active Optical Fiber 133 is 20/130, fibre core
A diameter of 20um, cladding thickness is 130um.
Wherein in one embodiment, because the size of two grades of Active Optical Fibers 132 and three-level Active Optical Fiber 133 is mismatched,
Polarization-maintaining pattern matcher 19 is accessed between to realize two kinds of conversions of Active Optical Fiber port, prevents laser from leaking outside, connect
Effect is more preferable.
Wherein in one embodiment, between laser seed source 10 and the one-level bundling device 121, the one-level active light
Polarization-maintaining isolator 15 is provided between fine 131 and two grades of bundling devices 122.Wherein in one embodiment, the polarization-maintaining isolator
15 maximum luminous powers that can pass through are 300mW.
Seed light is linearly polarized photon, and the polarization-maintaining isolator 15 can keep the linear polarization direction of seed light, and at this
Security isolation point is set on the circuit of nanosecond optical fiber green (light) laser generation green laser, to prevent high-power three-level pumping source
113 pump lights for sending reach prime device by the circuit along its direction of propagation, and prime device is exceeded due to that cannot bear
The light of its maximum luminous power and cause damage.
Wherein in one embodiment, band logical is provided between two grades of Active Optical Fibers 132 and the three-level Active Optical Fiber 133
Wave filter 16.
Seed light during above-mentioned three-level amplification is carried out, because circuit defect in itself may produce impurity light,
Impurity light outside target frequency can be filtered by the bandpass filter 16, obtain high-purity through the seed after power amplification
Light.
Wherein in one embodiment, nanosecond optical fiber green (light) laser also include collimater 17, the collimater 17 connects
The fundamental frequency light is received, and is sent to the frequency-doubling crystal 14 after collimation treatment is carried out to the fundamental frequency light, the collimater 17
Spot diameter is 0.2mm~0.3mm, and the angle of divergence is 5mrad~7mrad.
Seed light obtains fundamental frequency light after amplifying through three-level, and carrying out hot spot adjustment by collimater 17 obtains stablizing high-quality
Frequency-doubling crystal 14 is sent to after fundamental frequency light.
Above-mentioned device is connected by way of welding, in the circuit of the nanosecond optical fiber green (light) laser generation green laser
On, the pump light and cladding light of remnants are had with the line transmission, so the fusion point of bundling device at different levels output tail optical fiber is needed
High index of refraction glue removal pump light is applied after shelling length, suppresses the transmission of remaining pump light and cladding light so that on circuit
Seed light is purer, ensures the quality of the fundamental frequency light by being obtained after three-level power amplification.
Wherein in one embodiment, also including reflection filtering structure 18, the reflection filtering structure 18 receives described times
The green laser of the output of frequency crystal 14, and optical filtering treatment is carried out to the green laser, remove the impurity in the green laser
Light.
Optical filtering treatment is carried out to the green laser by being obtained after frequency multiplication, the purity of the green laser for finally giving is ensured,
Improve the quality of green laser.
Above-mentioned nanosecond optical fiber green (light) laser, seed light carry out after pumping closing beam obtaining coupling light, by three-level
Active Optical Fiber carries out three-level power amplification to the coupling light, a pumping is carried out when every grade of power amplification is carried out, further
Strengthen the power of seed light.Two polarization-maintainings isolation are provided with the circuit of the nanosecond optical fiber green (light) laser generation green laser
Device 15, while keeping the linear polarization direction of seed light, the pump light for preventing high-power three-level pumping source 113 from sending passes through
The circuit reaches prime device and is damaged along its direction of propagation.Seed light obtains fundamental frequency light after amplifying through three-level, by standard
Straight 17 pairs of fundamental frequency lights of device obtain the laser beam of high-quality after processing, and are sent to frequency-doubling crystal 14 and carry out process of frequency multiplication,
Exported after reflecting filtering structure 18 to carry out optical filtering treatment again, finally give narrow linewidth, the green laser of single pulse energy high,
Beam quality is high, and nanosecond optical fiber green (light) laser repetition rate it is high, energy conversion efficiency is high, small volume, it is easy of integration, exempt from dimension
Shield, easy heat radiation, it is air-cooled.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of nanosecond optical fiber green (light) laser, it is characterised in that including：
Laser seed source, for sending seed light；
Multistage pumping source, the pumping source of each rank is used to send the pump light of appropriate level；
Multistage bundling device, one-level bundling device in the multistage bundling device is used for the seed light and the multistage pumping source
The pump light that one-level pumping source sends couple and obtains coupling light, and be used for will be preceding for other bundling devices in the multistage bundling device
The pump light that the coupling light that the other bundling device of one-level sends sends with the pumping source of corresponding level is coupled；
Multistage Active Optical Fiber, the Active Optical Fiber of each rank is connected with the bundling device of corresponding level, for the coupling light to receiving
Carry out power amplification；
Frequency-doubling crystal, receives after carrying out multiple power levels amplification through the multistage pumping source, multistage bundling device and multistage Active Optical Fiber
The fundamental frequency light for obtaining, and process of frequency multiplication is carried out to the fundamental frequency light obtain green laser.
2. nanosecond optical fiber green (light) laser according to claim 1, it is characterised in that the laser seed source is distribution
Feedback laser, the pulsewidth of the seed light is 1ns~3ns.
3. nanosecond optical fiber green (light) laser according to claim 1, it is characterised in that the multistage pumping source is triplex
Pu source, multistage bundling device is three-level bundling device, and the multistage Active Optical Fiber is three-level Active Optical Fiber, and the three-level pumping source includes
One-level pumping source, diode pumping source and three-level pumping source, the multistage bundling device include one-level bundling device, two grades of bundling devices and three
Level bundling device, the three-level Active Optical Fiber includes one-level Active Optical Fiber, two grades of Active Optical Fibers and three-level Active Optical Fiber, the laser
Seed source and the one-level pumping source connect the input of the one-level bundling device, the output end connection institute of the one-level bundling device
State the input of one-level Active Optical Fiber, the output end of the one-level Active Optical Fiber and diode pumping source connection two grades of conjunctions
The input of beam device, the output end of two grades of bundling devices connects the input of two grades of Active Optical Fibers, and described two grades active
The output end of optical fiber connects the input of the three-level Active Optical Fiber, and the output end of the three-level Active Optical Fiber connects the three-level
The input of bundling device.
4. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that the pump of the one-level pumping source output
The power of Pu light is 200mW, and wavelength is 974nm, and the power of the pump light of the diode pumping source output is 10mW, and wavelength is
15nm, the three-level pumping source includes two pumping sources, and the power of the pump light of each pumping source output is 27mW, and wavelength is equal
It is 976nm.
5. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that the one-level bundling device is multiple for wavelength-division
With device, two grades of bundling devices are (1+1) * 1 polarization-maintaining bundling device, and the three-level bundling device is (2+1) * 1 polarization-maintaining bundling device.
6. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that the one-level Active Optical Fiber is wrapped for single
The polarization-maintaining of layer mixes ytterbium Active Optical Fiber, and the polarization-maintaining that two grades of Active Optical Fibers and three-level Active Optical Fiber are double clad mixes ytterbium active light
It is fine.
7. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that the laser seed source and described
Between level bundling device, polarization-maintaining isolator is provided between the one-level Active Optical Fiber and two grades of bundling devices.
8. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that two grades of Active Optical Fibers and described
Bandpass filter is provided between three-level Active Optical Fiber.
9. nanosecond optical fiber green (light) laser according to claim 3, it is characterised in that also including collimater, the collimation
Device receives the fundamental frequency light, and is sent to the frequency-doubling crystal after collimation treatment is carried out to the fundamental frequency light, the collimater
Spot diameter is 0.2mm~0.3mm, and the angle of divergence is 5mrad~7mrad.
10. nanosecond optical fiber green (light) laser according to claim 1, it is characterised in that also including reflection filtering structure, institute
State reflection filtering structure and receive the green laser of the frequency-doubling crystal output, and optical filtering treatment is carried out to the green laser, go
Except the impurity light in the green laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710054380.0A CN106877124A (en) | 2017-01-22 | 2017-01-22 | Nanosecond optical fiber green (light) laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710054380.0A CN106877124A (en) | 2017-01-22 | 2017-01-22 | Nanosecond optical fiber green (light) laser |
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| CN107991237A (en) * | 2017-12-26 | 2018-05-04 | 深圳市杰普特光电股份有限公司 | Spectral measurement device and system |
| CN109687270A (en) * | 2019-01-29 | 2019-04-26 | 深圳市杰普特光电股份有限公司 | Optical fiber laser |
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| CN113629482A (en) * | 2021-08-04 | 2021-11-09 | 安徽光智科技有限公司 | Subnanosecond green laser |
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| CN113314932A (en) * | 2021-06-11 | 2021-08-27 | 中国科学院上海光学精密机械研究所 | 760nm high-stability all-fiber frequency-doubled laser |
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| CN113629482B (en) * | 2021-08-04 | 2023-02-28 | 安徽光智科技有限公司 | Subnanosecond green laser |
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Application publication date: 20170620 |
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