A laser pump source system with low electrical loss

Abstract

The invention discloses a low-power-loss laser pumping source system, and belongs to the technical field of electronic equipment. The system structurally comprises a laser module (1), a power controlmodule (2) and a temperature control module (3); and the main structure of the power control module (2) comprises a load judging module (206), a delay compensation module (207), a voltage tracking module (208) and a power-off protection module (211). When the system works in different output power, the minimum power loss can be kept, so that the overall efficiency of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, and in particular relates to a laser pumping source system with low electric loss. 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 pum...

AI Technical Summary

Problems solved by technology

In this loop, the sum of the voltage drop borne by the power transistor Q1, the voltage drop borne by the sampling resistor Rs1, and the voltage drop borne by the laser diode is equal to the power supply voltage VCC (fixed value), when the set driving current changes from large to small , the voltage at both ends of the laser diode and the voltage at both ends of the sampling resistor Rs1 are correspondingly reduced, and the power transistor Q1 is a nonlinear device, which will actively bear the excess voltage to keep the sum of the three voltages equal to VCC, which will cause the circuit The generated electric power is more converted into the tube consumption of the power tube Q1, that is to say, as the set driving current decreases, the output power of the power control module decreases, but the power loss of the power control module itself increases, which means On the one hand, the overall efficiency of the system will drop sharply. On the other hand, with the increase of the tube consumption of the power tube Q1, the heat generated by it will increase, and the temperature of the system will increase, and the increase of temperature will bring about more serious problems. Consequences: Reduce the stability of the output current and bring the risk of burning out the power tube

[0005] In addition, patent 2016108010570 does not have the function of overcurrent protection. Once a certain control unit fails and the current value output to the butterfly laser module exceeds the maximum safe current value that the butterfly laser can withstand, it is easy to burn the butterfly laser. Bad

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