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Constant-current complementary control circuit of high-power semiconductor laser device

A technology for controlling circuits and semiconductors, applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve difficult problems such as large current and constant current control, and achieve high reliability and safety effects

Inactive Publication Date: 2013-07-31
NANJING NOVEL PHOTOELECTRIC SYST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing high-power semiconductor laser drivers can achieve constant current control of tens of amperes, it is difficult to fully satisfy the constant current control of larger currents, especially in the case of high-frequency modulation.

Method used

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  • Constant-current complementary control circuit of high-power semiconductor laser device
  • Constant-current complementary control circuit of high-power semiconductor laser device
  • Constant-current complementary control circuit of high-power semiconductor laser device

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the high-power semiconductor laser constant current complementary control circuit of the present invention includes:

[0040] Laser current control circuit (11), laser current feedback circuit (13), semiconductor laser (14), laser current control MOSFET (15), laser current sampling (16), compensation current sampling (17), compensation current control MOSFET (18 ), the compensation loop load (19), the compensation current control circuit (21), and the compensation current feedback circuit (23); the semiconductor laser (14) is respectively connected to the power supply and the drain of the laser current control MOSFET (15), and the laser The source of the current control MOSFET (15) is connected in series with the laser current sampling resistor (16) to the ground; the compensation loop load (19) is respectively connected between the power supply and the drain of the compensation current control MOSFET (18), and the compensation current The s...

Embodiment 2

[0042] Such as figure 2 As shown, the laser current feedback circuit is a differential amplifier circuit composed of operational amplifier U2B, resistors R20, R27, R26, R21, R28, R33, and capacitors C8 and C11. LD40A_SHUNT+ is connected to the positive terminal of laser current sampling resistor R15, LD40A_SHUNT- is connected to the ground terminal of laser current sampling resistor R15; resistors R21, R28 and capacitor C11 form a first-order low-pass filter; resistor R33 and capacitor C11 form a second-order low-pass filter Filter; this circuit realizes high-precision sampling and amplification of laser current.

Embodiment 3

[0044] Such as image 3 As shown, the compensation current feedback circuit is a differential amplifier circuit composed of operational amplifier U2C, resistors R22, R30, R29, R23, R31, R34, and capacitors C9 and C12. LD30A_SHUNT+ is connected to the positive terminal of compensation current sampling resistor R35, LD30A_SHUNT- is connected to the ground terminal of compensation current sampling resistor R35; resistors R23, R31 and capacitor C12 form a first-order low-pass filter; resistor R34 and capacitor C12 form a second-order low-pass filter Filter; this circuit realizes high-precision sampling amplification of compensation current.

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Abstract

The invention relates to a constant-current complementary current drive and control circuit of a high-power semiconductor laser device for drive and control of the high-power semiconductor laser device, and belongs to the field of electronic and optoelectronic industries. The constant-current complementary current drive and control circuit comprises functional circuits such as a laser current control circuit, a laser current feedback circuit, a laser current sampling resistor, a laser current MOSFET (metal oxide semiconductor field effect transistor), the semiconductor laser device, an external modulating signal circuit, a compensating current control circuit, a compensating current feedback circuit, a compensating current sampling resistor, a compensating current MOSFET and a compensating loop load. The constant-current complementary current drive and control circuit has the advantages that the stability of output current of a high-power and high-current semiconductor laser driver is improved greatly, total output current of the semiconductor laser driver is in a constant-current state through an external high-frequency modulation signal, and fluctuation of total current of a power supply is reduced, so that the stability and the reliability of the whole laser device driver are improved.

Description

technical field [0001] The invention relates to a high-power semiconductor laser constant-current complementary control circuit, in particular to a high-power semiconductor laser constant-current complementary control circuit controlled by an external high-frequency modulation signal, and relates to the fields of electronics and optoelectronics. Background technique [0002] The application range of semiconductor laser covers the whole field of optoelectronics, and has become the core technology of optoelectronics science. Due to the advantages of small size, simple structure, high conversion efficiency, long life, easy modulation and low price, semiconductor lasers are widely used in the field of optoelectronics, including industry, military, medical, communication and many other fields. At present, high-power semiconductor lasers and high-power semiconductor laser pumped solid-state lasers are used in civil fields such as material processing, laser marking, laser printing,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042
Inventor 张未陈力王迅李晓丽张存林冯立春
Owner NANJING NOVEL PHOTOELECTRIC SYST
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