Unlock instant, AI-driven research and patent intelligence for your innovation.

Narrow pulse width high power laser constant current drive circuit and optical module

A constant current drive and laser technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problems of difficult to accurately control the output current pulse width, limit applications, etc., to improve quality, facilitate heat dissipation, and improve stability.

Active Publication Date: 2021-09-21
CASI VISION TECH (BEIJING) CO LTD +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These schemes are also difficult to achieve precise control of the output current pulse width, which limits its application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Narrow pulse width high power laser constant current drive circuit and optical module
  • Narrow pulse width high power laser constant current drive circuit and optical module
  • Narrow pulse width high power laser constant current drive circuit and optical module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] figure 1 It is the first circuit structure diagram of the narrow pulse width high power laser constant current drive circuit according to the embodiment of the present invention. Among them, the narrow pulse width and high power laser constant current driving circuit of this embodiment, the circuit implementation includes: the first resistor R1, the transistor M1, the operational amplifier U1, the first analog switch U2, the second resistor R2, the third resistor R3, the fourth Resistor R4, laser D1; the first resistor R1 is a current sampling resistor, the first terminal of which is connected to the power terminal, the second terminal is connected to the source of transistor 101; the first terminal of the second resistor R2 is connected to the source of transistor 101, the second The terminal is connected to the negative input terminal of the operational amplifier U1; the first terminal of the third resistor R3 is connected to the negative input terminal of the operati...

Embodiment 2

[0092] figure 2 It is the second circuit structure diagram of the narrow-pulse-width high-power laser constant-current drive circuit in the embodiment of the present invention. figure 2 The shown embodiment 2 is based on the embodiment 1, adding a signal adjustment circuit 102 . The signal adjustment circuit 102 is used to compensate the deep negative feedback circuit formed by the operational amplifier U1, the fifth resistor R5 and the third resistor R3 form a proportional amplification circuit, and the sixth resistor R6, the first capacitor C1 and the third resistor R3 form a The integral circuit plays the role of adjusting the signal of the deep negative feedback circuit.

[0093] Figure 7 It is a transient simulation waveform diagram of the second circuit of the narrow-pulse-width high-power laser constant-current drive circuit in the embodiment of the present invention. Exemplarily, in the signal adjustment circuit 102, the fifth resistor R5 is set to 200kΩ, the six...

Embodiment 3

[0096] image 3 It is the third circuit structure diagram of the narrow pulse width high power laser constant current driving circuit according to the embodiment of the present invention. Such as image 3 As shown, the narrow pulse width high power laser constant current drive circuit, the circuit implementation includes: first resistor R1, transistor M1, operational amplifier U1, first analog switch U2, second resistor R2, third resistor R3, fourth resistor R4 , laser D1, pulse shaping circuit 201; the first resistor R1 is a current sampling resistor, its first terminal is connected to the power supply terminal, and the second terminal is connected to the source of the transistor 101; the first terminal of the second resistor R2 is connected to the source of the transistor 101 , the second terminal is connected to the negative input terminal of the operational amplifier U1; the first terminal of the third resistor R3 is connected to the negative input terminal of the operati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a constant current driving circuit and an optical module of a narrow pulse width high power laser. The circuit includes: a first resistor, a transistor, an operational amplifier, a first analog switch, a second resistor, a third resistor, a fourth resistor and a laser; the first resistor includes: a current sampling resistor; the first resistor, which The first terminal is connected to the power supply terminal, and the second terminal is connected to the source of the transistor; the first terminal of the second resistor is connected to the source of the transistor, and the second terminal is connected to the negative input terminal of the operational amplifier; The third resistor, the first terminal of which is connected to the negative input terminal of the operational amplifier, and the second terminal is connected to the output terminal of the first analog switch. The circuit of the present invention modulates the first analog switch U2 to output a pulse width modulation voltage through a PWM signal, so that the output current corresponds to the PWM waveform and achieves the purpose of driving the laser with narrow pulse width and high power by constant current.

Description

technical field [0001] The invention relates to the technical field of laser constant current drive circuits, in particular to a narrow pulse width high power laser constant current drive circuit and an optical module. Background technique [0002] Semiconductor lasers have been widely used in laser communication, laser marking, laser ranging, laser radar and other fields. One of the characteristics of semiconductor lasers is that they are driven by constant currents. Therefore, in order to generate lasers with high stability wavelengths, it is required to have high stability of constant currents, and the characteristics of small surge currents and no reverse overshoot currents. At present, there are many kinds of schemes for laser constant current drive circuits, but it is still difficult to find one that uses the output terminal of the laser to be grounded, and at the same time has the pulse width and amplitude of the current that can be adjusted arbitrarily, and has high ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/042
CPCH01S5/042H01S5/0427H01S5/0428
Inventor 胡肖松骈冰戢冰梁钦
Owner CASI VISION TECH (BEIJING) CO LTD