Pulse modulation drive circuit of semiconductor laser unit

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...

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.

Images