Automatic temperature control method of quick response type super luminescent diode (SLD) and driving device of quick response type SLD
A temperature control method and technology of a temperature control device, applied in the directions of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of heavy debugging workload, poor control effect, poor versatility, etc., and reduce the cost of debugging work Effect
Inactive Publication Date: 2014-04-09
WUXI KEY SENSOR PHOTONICS TECH +1
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Problems solved by technology
Due to the lack of precise parameters of thermistors and thermoelectric coolers, a large number of experiments are required to determine the parameters of the control system
The temperature control accuracy of this method is not high, the debugging workload is large, the response speed is slow, the control effect is poor, and the versatility is poor
Method used
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[0039] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0040] At present, the SLD chip module 8 includes an SLD die 81, a thermistor 82 and a thermoelectric cooler 83, the SLD die 81 and the thermistor 81 are attached to the thermoelectric cooler 83, and the SLD die is detected by the thermistor 81 temp.
[0041] Such as figure 1As shown: in order to improve the stability and rapidity of the temperature control of the SLD tube core 81, the microprocessor 3 is connected with the thermoelectric cooler 83 through the first D / A converter 4 and the thermoelectric cooler driver 6 for driving the thermoelectric cooler. The refrigerator 83 produces a certain amount of refrigeration. The output terminal of the microprocessor 3 is connected with the SLD die 81 through the second D / A converter 5 and the SLD die driver 7, and is used to drive the SLD die 81 to work. The thermistor 81 is connected to the microprocessor 3 thr...
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The invention relates to an automatic temperature control method of a quick response type super luminescent diode (SLD) and an automatic temperature control driving device of the quick response type SLD. The method comprises the following steps that: (a), a microprocessor sends a frequency sweeping signal to obtain an amplitude-frequency characteristic curve of a thermistor and a thermoelectric refrigerator; (b), the response time T1 and response time T2 of a series second-order link of the thermistor and the thermoelectric refrigerator are obtained by using a recursive algorithm; (c), parameters of an anticipatory control link and a controller in the microprocessor are set; and (d), the microprocessor samples the luminescence power of an SLD tube core through a photoelectric detector to obtain a power-voltage curve during operation of the SLD tube core and checks the parameters of the anticipatory control link and the controller in the microprocessor, if the parameters of the anticipatory control link and the controller in the microprocessor are matched, the SLD tube core normally operates, and if the parameters of the anticipatory control link and the controller in the microprocessor are not matched, the microprocessor adjusts the setting parameters of the anticipatory control link and the controller. The invention has the advantages of high stability, high generality, no steady-state errors and high response speed.
Description
technical field [0001] The invention relates to a control method and device, in particular to a quick-response super-radiation light-emitting diode automatic temperature control method and a driving device thereof, belonging to the technical field of super-radiation light-emitting diode control. Background technique [0002] The performance of superluminescent diodes (SLDs) is between that of laser diodes (LDs) and light emitting diodes (LEDs). It has two major characteristics of short coherence length and high output power. At present, it is widely used in fiber optic gyroscope (FOG), optical time domain reflectometer (OTDR), optical frequency domain reflectometer (OFDR), white light interferometer, distributed optical fiber sensing and so on. The stability of the SLD light source has a great influence on the accuracy and stability of these systems, so it is extremely important to control the high and stable output of the SLD. [0003] The stability of the SLD light sourc...
Claims
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IPC IPC(8): G05D23/24
Inventor 孙小菡潘超卢瑾辉赵兴群万遂人冯宏伟殷强
Owner WUXI KEY SENSOR PHOTONICS TECH