Pulse modulation drive circuit of semiconductor laser unit

A technology of pulse modulation and drive circuit, which is applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve problems such as failure to meet development needs, lack of versatility, complex circuits, etc., and achieve rapid pulse response, reliable performance, and pulse output powerful effect

Active Publication Date: 2014-08-13
WUXI LUMISOURCE TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the traditional semiconductor laser pulse drive power supply circuit is relatively complex, and it is limited to specific laser application fields. It does not have wide versatility, and its structure is relatively large, with too many redundant functions.
As the frequency of infrared laser pulses output by the laser system in the field of infrared detection becomes wider and wider, the requirements for the overall structure and stability of the system are getting higher and higher, and the existing semiconductor laser drive circuit can no longer meet the development needs.

Method used

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  • Pulse modulation drive circuit of semiconductor laser unit
  • Pulse modulation drive circuit of semiconductor laser unit
  • Pulse modulation drive circuit of semiconductor laser unit

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0026] The semiconductor laser pulse modulation driving circuit in this embodiment specifically includes an isolated input circuit, an inverter circuit, a pulse width limiting circuit, a pulse signal amplification circuit, a pulse current control circuit and a laser interface matching circuit.

[0027] The isolation input circuit is used to realize external isolation by using an isolation switch, and output the isolated pulse signal to the inverter circuit.

[0028] In this embodiment, if figure 1 As shown, the isolated input circuit includes a resisto...

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Abstract

The invention discloses a pulse modulation drive circuit of a semiconductor laser unit. The pulse modulation drive circuit of the semiconductor laser unit comprises an isolation input circuit, a phase inverter circuit, a pulse width limiting circuit, a pulse signal amplification circuit, a pulse current control circuit and a laser unit interface matching circuit. The pulse modulation drive circuit of the semiconductor laser unit has the advantages that the universality is high, the structure is simple, and performance is reliable; pulse response is fast, and the nanosecond response speed requirement is met; the pulse output power is large, and the maximum output pulse current can reach up to ten amperes; the anti-interference capacity is high, external disturbance is avoided in practical application, and the electromagnetic radiation environment of the system cannot be affected.

Description

technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a semiconductor laser pulse modulation drive circuit. Background technique [0002] Semiconductor lasers are current-injection semiconductor PN junction light-emitting devices, which have the characteristics of small size, light weight, direct modulation, wide bandwidth, high conversion efficiency, high reliability and easy integration, and are widely used. However, the traditional semiconductor laser pulse drive power supply circuit is relatively complex, limited to specific laser application fields, does not have wide versatility, and has a relatively large structure with too many redundant functions. As the frequency of infrared laser pulses output by the laser system in the field of infrared detection becomes wider and wider, the requirements for the overall structure and stability of the system become higher and higher, and the existing semiconductor laser drive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042
Inventor 李大明韦春雷
Owner WUXI LUMISOURCE TECH
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