High stability laser generating circuit based on PID control

A high-stability technology for generating circuits, applied to circuits, lasers, laser components, etc., can solve problems such as laser temperature rise, easy burning, output optical power oscillation, etc., to prevent damage to laser modules, prevent oscillations, and improve The effect of stability

Active Publication Date: 2016-11-16
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the fiber laser, a laser generating circuit (pump source) must provide the energy source for the entire fiber laser. As the core part of the fiber laser, the main technical index of the pump source is the stability of the output laser. In the laser generating circuit, the system composed of butterfly laser module, current driver and temperature controller is widely used due to its advantages of convenient use, rich functions, high stability and easy integration. The prior art closest to the present invention is In 2014, our research group applied for the invention patent "a high-stability fiber laser pump source", the application number is 2014103102505. In this document, the butterfly laser module is used as the light source, and the constant current driver with high stability is used. It is driven and controlled by a constant temperature controller. In addition to controlling the temperature of the butterfly laser module, it also controls the temperature of other n

Method used

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  • High stability laser generating circuit based on PID control
  • High stability laser generating circuit based on PID control
  • High stability laser generating circuit based on PID control

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 Overall structure of the system

[0027] Such as figure 1 As shown, the system structure has a laser module 1, a power control module 2 and a temperature control module 3, and the power control module 2 is composed of a power setting module 21, a power sampling module 22, a PID operation module 23, an LD driving module 24 and an overtemperature The power-off module 25 is formed, the power control module 2 and the temperature control module 3 are connected to the laser module 1, the power control module 2 provides the driving current to the laser module 1, the output optical power is controlled by the size of the driving current, and the power setting module 21 sets the required power (output in the form of voltage), and the power sampling module 22 samples the output optical power through the photodiode (PD) integrated in the laser module 1 and converts it into a voltage, and then the voltage set by the power setting module 21 is in the Carry out seeking d...

Embodiment 2

[0028] Embodiment 2 laser module

[0029] The laser module 1 of this embodiment selects the laser module of Jie Dixun LC96 butterfly package, and its package and pin schematic diagram are as follows figure 2 As shown, the laser module integrates laser diode LD, photodiode PD, thermoelectric cooler TEC and thermistor NTC. The module has 14 pins, including 6 pins, 7 pins, 8 pins, 9 pins, and 12 pins. Both are empty pins (NC). Pin 1 and pin 14 are the two current input terminals (port TEC+ and port TEC-) of the internal thermoelectric cooler respectively, which are used to connect with the current output port of the temperature control module 3. Pin 2 and Pin 5 is the two wiring ports (port NTC+ and port NTC-) of the internal integrated thermistor, which are used to connect with the thermistor input of the temperature control module 3, and the port NTC+ is also connected to the input of the over-temperature power-off module 25 Connected, pin 3 and pin 4 are the two wiring ports...

Embodiment 3

[0030] Embodiment 3 temperature control module

[0031] The temperature control module 3 described in the present invention is a prior art, specifically, Chinese patent CN2007100559129 (high-stability constant temperature controller) or Chinese patent CN2010102701027 (wide power consumption limitation based on thermoelectric cooler) applied by the applicant's research group type constant temperature controller), the temperature control module 3 has a set of current output terminals for driving the thermoelectric cooler for cooling or heating, and the temperature control module 3 also has a set of thermistor input terminals for connecting the thermistor. And the resistance value change of the thermistor (the change in resistance value reflects the change in temperature) is converted into a voltage change and fed back to the temperature control module 3 to realize automatic temperature control.

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Abstract

The invention provides a high stability laser generating circuit based on PID control, belonging to the electronic equipment technical field. The high stability laser generating circuit comprises a laser module (1), a power control module (2) and a temperature control module (3), and is characterized in that the power control module (2) is composed of a power setting module (21), a power sampling module (22), a PID calculation module (23), an LD driving module (24) and an overtemperature power off module (25). The high stability laser generating circuit has high stability, and is provided with an overtemperature power off function.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, in particular to a high-stability laser generating circuit based on PID control. Background technique [0002] With its low threshold, high power, high beam quality, good reliability, compact structure and good heat dissipation, fiber lasers are widely used in laser fiber communication, laser space long-distance communication, industrial shipbuilding, automobile manufacturing, laser engraving, Laser marking, laser cutting, printing roll, metal and non-metal drilling / cutting / welding (brazing, quenching, cladding and deep welding), military defense security, medical equipment and other fields. A fiber laser is a laser that uses a rare earth-doped fiber as a gain medium. Fiber lasers are developed on the basis of fiber amplifiers and are composed of three basic elements: pump source, rare earth element-doped fiber, and resonant cavity. The working principle is: the photons at the pump ...

Claims

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Application Information

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IPC IPC(8): H01S3/091
CPCH01S3/0912
Inventor 汝玉星田小建吴戈高博单江东高福斌李尚安明梁雪刘大恺马春阳
Owner JILIN UNIV
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