CN110707513A - Temperature adjusting method and system of laser and computer readable storage medium - Google Patents
Temperature adjusting method and system of laser and computer readable storage medium Download PDFInfo
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- CN110707513A CN110707513A CN201910954146.2A CN201910954146A CN110707513A CN 110707513 A CN110707513 A CN 110707513A CN 201910954146 A CN201910954146 A CN 201910954146A CN 110707513 A CN110707513 A CN 110707513A
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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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
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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
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
- H01S5/02415—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling by using a thermo-electric cooler [TEC], e.g. Peltier element
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- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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- Semiconductor Lasers (AREA)
Abstract
The application relates to a temperature regulation method and system of a laser and a computer readable storage medium, wherein the method comprises the following steps: collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value. By the temperature adjusting method of the laser, the working current is controlled within the rated peak output current of the switch, and the damage to a power supply circuit of the switch is avoided.
Description
Technical Field
The present application relates to the field of optical communication technologies, and in particular, to a method and a system for adjusting a temperature of a laser, and a computer-readable storage medium.
Background
The optical module is an optoelectronic device for photoelectric signal conversion, and is mainly applied to the field of optical communication. In an ultra-long distance or in a wavelength division multiple access system, a TEC temperature control system is needed to ensure the stability of laser and the constant-temperature operation of a laser.
When an optical module is inserted, the difference between the ambient temperature and the constant temperature at which the laser operates is sometimes large, and the laser itself also generates temperature. A typical laser temperature control system directly inputs a temperature setting value into an automatic control network (PID), compares a monitored temperature with the temperature setting value, generates a temperature adjustment signal voltage, and outputs the temperature adjustment signal voltage to a refrigerator driver (TEC) DRV, and then the TEC DRV adjusts the laser temperature to a set constant temperature value. The temperature adjusting process is very short, and very large surge current can be generated and exceeds the rated peak output current of the switch, so that the power supply circuit of the switch is damaged, and the service life of the module is shortened.
Therefore, the prior art is in need of improvement.
Disclosure of Invention
The application provides a temperature adjusting method and system of a laser and a computer readable storage medium, which control the working current within the rated peak output current of a switch to avoid the damage of a power supply circuit of the switch, so as to solve the problems that the current generated during the temperature adjustment of the laser is large, the power supply circuit of the switch is damaged, and the service life of an optical module is shortened in the prior art.
In a first aspect, an embodiment of the present application provides a method for regulating a temperature of a laser, where the method includes: collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
Optionally, before acquiring the temperature value of the laser, the method includes: inserting an optical module into a switch; after the optical module is plugged into the switch, the laser drive and the refrigerator drive are turned off.
Optionally, adjusting the temperature value to a first temperature value according to the comparison result includes: performing digital-to-analog conversion on the first temperature value to obtain a first voltage value; comparing the first voltage value with the voltage value of the target temperature to obtain a temperature regulation voltage; and adjusting the temperature of the laser according to the temperature adjusting voltage.
Optionally, the first temperature value is a unit temperature adjacent to the temperature value, and includes: and dividing the temperature value range of the laser into at least one unit temperature, wherein each unit temperature corresponds to a voltage value.
Optionally, adjusting the temperature value to a first temperature value according to the comparison result includes: reducing the temperature value to an adjacent first unit temperature value when the temperature value is greater than a target temperature value; increasing the temperature value to an adjacent first unit temperature value in case the temperature value is less than a target temperature value; and when the temperature value is equal to the target temperature value, the laser locks the temperature at the target temperature value.
Optionally, after performing digital-to-analog conversion on the first temperature value to obtain a first voltage value, the method includes: outputting the first voltage value to an automatic regulator, and starting a refrigerator to drive; and transmitting the temperature adjusting voltage to the refrigerator drive, and adjusting the temperature of the laser by the refrigerator drive according to the temperature adjusting voltage.
Optionally, in a case that the temperature value is equal to a target temperature value, the laser locking the temperature after the target temperature value includes: the laser is driven on.
In a second aspect, an embodiment of the present application provides a temperature adjustment system for a laser, including: a laser; a laser driver for driving the laser; a refrigerator for adjusting the temperature of the laser; a refrigerator drive for driving the refrigerator; the automatic regulator is used for collecting the temperature value of the laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; repeating the temperature adjusting process until the temperature value of the laser is adjusted to a target temperature value; and a control unit for setting a target temperature and outputting a laser driving signal.
In a third aspect, an embodiment of the present application provides a temperature adjustment system for a laser, where the temperature adjustment system for a laser may implement the following steps:
collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
Compared with the prior art, the embodiment of the application has the following advantages:
according to the method provided by the embodiment of the application, firstly, the temperature value of the laser is collected; then comparing the temperature value with a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and finally, repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value. By the temperature adjusting method of the laser, the working current is controlled within the rated peak output current of the switch, and the damage to a power supply circuit of the switch is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for adjusting the temperature of a laser according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a temperature adjustment system of a laser in an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The inventor finds that a common laser temperature control system directly inputs a temperature setting value into a PID network, compares a monitored temperature with the temperature setting value, generates a temperature adjusting signal voltage to be output to a TEC DRV, and then the tecrv adjusts the laser temperature to a set constant temperature value. This process is short and produces a very large inrush current, with a peak output current that exceeds the rated value of the switch by a large amount. Damage to the power supply circuitry of the switch and a reduction in the life of the module itself.
In order to solve the above problem, in the embodiment of the present application, the MCU reads the real-time temperature of the laser, calculates the difference between the set constant temperature value and the ambient temperature, and gradually adjusts the operating temperature of the laser to the set constant temperature value. Although the temperature control time can be prolonged, the consumed current of the temperature control system can be controlled within a reasonable range, and the rated range of the optical module overall consumed switchboard is ensured, so that the problem that the optical module consumes excessive power instantly can be solved.
Various non-limiting embodiments of the present application are described in detail below with reference to the accompanying drawings.
An embodiment of the present application provides a method for adjusting a temperature of a laser, as shown in fig. 1, the method includes:
and S1, collecting the temperature value of the laser.
Before step S1, the optical module is inserted into the switch, and after the optical module is inserted into the switch, the laser drive (LD DRV) and the refrigerator drive (TEC DRV) are turned off.
In an alternative embodiment, a control Unit (MCU) detects a voltage value on a thermistor of the laser, converts the voltage value into a numerical value to obtain a temperature value of the laser, and obtains the temperature value of the laser. Specifically, the MCU detects a voltage value on the thermistor of the laser, performs analog-to-digital conversion (ADC conversion) on the voltage value, and converts an analog signal into a digital signal to obtain a temperature value of the laser.
S2, comparing the temperature value with a target temperature value;
in the embodiment of the application, the acquired temperature value of the laser is compared with the target temperature value.
S3, adjusting the temperature value to a first temperature value according to the comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value;
in the embodiment of the application, the temperature value range of the laser is divided into at least one unit temperature, each unit temperature corresponds to a voltage value, and the temperature value range represents the temperature occurring when the laser works. For example, the temperature of the laser is-40- +118 ℃, the temperature range is divided into 80 small areas, and the unit temperature is T1，T2，T3～Tn～T79，T80. Each zone having a unit temperature TnEach unit temperature corresponds to a voltage value. The unit temperature value is stored in a fixed register, and corresponding voltage is output to adjust the working temperature of the laser through digital-to-analog conversion.
In an alternative embodiment, at said temperature value TnGreater than target temperature value TmIn the case of (2), the temperature value T is setnReduced to the adjacent first unit temperature value Tn-1(ii) a At said temperature value TnLess than target temperature value TmIn the case of (2), the temperature value T is setnIncreasing to an adjacent first unit temperature value Tn+1(ii) a At said temperature value TnEqual to target temperature value TmThe laser locks the temperature at the target temperature value.
For example, the following steps are carried out: the target temperature of the laser is 30 ℃, the temperature of the detection laser is 50 ℃, and the temperature tolerance is 2, so that the temperature value of the laser is reduced to 48 ℃. The target temperature of the laser is 30 deg.c and the temperature of the detection laser is 20 deg.c, with a temperature tolerance of 2, the temperature value of the laser is increased to 22 deg.c.
In the embodiment of the present application, when the temperature value is equal to the target temperature value, the laser is driven to be turned on after the laser locks the temperature at the target temperature value.
In an alternative embodiment, adjusting the temperature value to a first temperature value based on the comparison comprises: performing digital-to-analog conversion (converting a digital signal into an analog signal) on the first temperature value to obtain a first voltage value; outputting the first voltage value to an automatic regulator (PID), turning on a refrigerator drive (TEC DRV); comparing the first voltage value with the voltage value of the target temperature to obtain a temperature regulation voltage; transmitting the temperature adjustment voltage to the refrigerator driver (TEC DRV), the refrigerator driver (TEC DRV) adjusting the temperature of the laser according to the temperature adjustment voltage.
And S4, repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
In the embodiment of the present application, the above steps S1, S2, and S3, or steps S2 and S3 may be repeated until the temperature value of the laser is adjusted to the target temperature value. After the temperature adjustment process is performed once, the next temperature adjustment is performed at predetermined intervals.
In an alternative embodiment, a method of temperature regulation of a laser includes:
step 1, the optical module is inserted into the switch, and the MCU closes the TEC DRV and the LD DRV firstly.
Step 2, the MCU detects the voltage value on the thermistor of the laser, converts the voltage value into a numerical value, namely determines the temperature area of the value corresponding to the working environment temperature according to the voltage value, and obtains the temperature value T of the lasern。
Step 3, when T is reachednGreater than TmSetting the temperature to a corresponding value Tn-1(ii) a When T isnLess than TmSetting the temperature to a corresponding value Tn+1(ii) a Outputting the voltage value converted by the corresponding DAC to a PID control part of the TEC circuit, and turning on the TEC for driving; comparing the converted voltage value with a voltage value corresponding to a monitored temperature (target temperature), generating a temperature regulation voltage, outputting the temperature regulation voltage to the TEC DRV, and regulating the temperature of the laser to T by the TEC DRVn-1Or Tn+1。
After the interval of 50 milliseconds (the interval time is adjustable), step 4, converting Tn-2The value is converted to a voltage by the DAC and then output to the PID control portion of the TEC circuit, and the process in step 3 is repeated until the temperature is adjusted to Tm, and the laser temperature is converted to a voltage by the DAC and then output to the PID control portion of the TEC circuit, and the laser temperature will be locked at the target temperature.
And 5, opening the laser drive, controlling the laser drive chip by the MCU through the I2C line, and increasing the laser emission power to a target value from small to large in four steps. Since the laser itself generates heat during operation, the laser emission power in step 5 needs to be increased in several steps in order to increase the stability of the laser operation.
According to the SFF-8431 protocol, the switch allows a continuous peak current value of 500mA with respect to the SFP + optical module operating current. Tests show that the peak value of continuous current consumed by the common laser temperature control system can reach 800-900 mA at high temperature (or low temperature) and exceeds a large amount. In the embodiment of the application, the measured continuous peak current value is about 400mA and is lower than 500 mA.
Through the temperature regulation system of laser instrument in this application, with operating current control in the rated peak output current of switch, when having avoided the damage of switch supply circuit, the protection laser instrument increases the life of laser instrument, has increased the stability of optical module work.
An embodiment of the present application provides a temperature adjustment system for a laser, as shown in fig. 2, the system includes:
a laser 20;
a laser driver (LD DRV)21 for driving the laser 20;
a refrigerator (TEC)22 for adjusting the temperature of the laser 20;
a refrigerator drive (TEC DRV)23 for driving the refrigerator 22;
an automatic regulator (PID)24 for comparing the temperature value with a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; repeating the temperature adjusting process until the temperature value of the laser is adjusted to a target temperature value;
and a control unit (MCU)25 for setting a target temperature, collecting a temperature value of the laser, and outputting a laser driving signal.
In the embodiment of the application, before the temperature value of the laser is collected, the optical module is inserted into the switch, and after the optical module is inserted into the switch, the laser drive and the refrigerator drive are closed.
In an optional implementation mode, the MCU collects a temperature value of the laser, the collected temperature value of the laser is output to the PID, and the PID compares the temperature value with a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; the PID repeats the temperature adjustment process until the temperature value of the laser is adjusted to a target temperature value. Wherein
Specifically, performing digital-to-analog conversion on the first temperature value to obtain a first voltage value; outputting the first voltage value to PID, and opening TEC DRV; comparing the first voltage value with the voltage value of the target temperature to obtain a temperature regulation voltage; and transmitting the temperature adjusting voltage to the TEC DRV, and adjusting the temperature of the laser by the TEC DRV according to the temperature adjusting voltage.
In the embodiment of the present application, when the temperature value is equal to the target temperature value, the laser locks the temperature at the target temperature value, and then opens the LD DRV.
Through the temperature regulation system of laser instrument in this application, with operating current control in the rated peak output current of switch, avoid switch supply circuit's damage to the current that produces when solving among the prior art to the temperature regulation of laser instrument is great, causes the damage to the supply circuit of switch, reduces optical module life's problem.
The embodiment of the application provides a temperature regulation system of a laser, which realizes the following steps:
collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
collecting a temperature value of a laser; comparing the temperature value to a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of temperature regulation of a laser, the method comprising:
collecting a temperature value of a laser;
comparing the temperature value to a target temperature value;
adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value;
and repeating the temperature adjusting process until the temperature value of the laser is adjusted to the target temperature value.
2. The method of claim 1, wherein prior to collecting the temperature value for the laser, comprising:
inserting an optical module into a switch;
after the optical module is plugged into the switch, the laser drive and the refrigerator drive are turned off.
3. The method of claim 1, wherein adjusting the temperature value to a first temperature value based on the comparison comprises:
performing digital-to-analog conversion on the first temperature value to obtain a first voltage value;
comparing the first voltage value with the voltage value of the target temperature to obtain a temperature regulation voltage;
and adjusting the temperature of the laser according to the temperature adjusting voltage.
4. The method of claim 1, wherein the first temperature value is a unit temperature adjacent to the temperature value, comprising:
and dividing the temperature value range of the laser into at least one unit temperature, wherein each unit temperature corresponds to a voltage value.
5. The method of claim 4, wherein adjusting the temperature value to a first temperature value based on the comparison comprises:
reducing the temperature value to an adjacent first unit temperature value when the temperature value is greater than a target temperature value;
increasing the temperature value to an adjacent first unit temperature value in case the temperature value is less than a target temperature value;
and when the temperature value is equal to the target temperature value, the laser locks the temperature at the target temperature value.
6. The method of claim 3, wherein after performing digital-to-analog conversion on the first temperature value to obtain the first voltage value, the method comprises:
outputting the first voltage value to an automatic regulator, and starting a refrigerator to drive;
and transmitting the temperature adjusting voltage to the refrigerator drive, and adjusting the temperature of the laser by the refrigerator drive according to the temperature adjusting voltage.
7. The method of claim 5, wherein the laser locking the temperature after the target temperature value if the temperature value is equal to the target temperature value comprises:
the laser is driven on.
8. A temperature regulation system for a laser, the system comprising:
a laser;
a laser driver for driving the laser;
a refrigerator for adjusting the temperature of the laser;
a refrigerator drive for driving the refrigerator;
an automatic regulator for comparing the temperature value with a target temperature value; adjusting the temperature value to a first temperature value according to a comparison result, wherein the first temperature value is a unit temperature adjacent to the temperature value; repeating the temperature adjusting process until the temperature value of the laser is adjusted to a target temperature value;
and the control unit is used for setting a target temperature, acquiring a temperature value of the laser and outputting a laser driving signal.
9. A temperature regulation system for a laser, characterized in that it implements the steps of the method of any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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Cited By (1)
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| US20200295535A1 (en) * | 2017-12-15 | 2020-09-17 | Horiba, Ltd. | Semiconductor laser device, and method and program for driving the same |
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Application publication date: 20200117 |