A single-ended flyback circuit laser drive circuit

Abstract

A laser circuit is an improved single-ended flyback circuit. A C1 is an input filter capacitor; an IGBT1 is a switch tube; an L1 is a flyback inductor; primaries of three flyback transformers T1, T2 and T3 are connected in parallel and then connected to two ends of the inductor L1; a D1, an R1, a C2 and a Z1 form an absorption circuit; the T1, the T2 and the T3 are the same completely; each of the T1, the T2 and the T3 comprises one primary and two secondaries; a C3 and a D2 are filter circuits of one secondary of the T1; a C4 and a D3 are the filter circuits of the other secondary of the T1; a C5 and a D4 are the filter circuits of one secondary of the T2; a C6 and a D5 are the filter circuits of the other secondary of the T2; a C7 and a D6 are the filter circuits of one secondary of the T3; a C8 and a D7 are the filter circuits of the other secondary of the T3; and voltages of the secondaries are connected in series and then output to a load as a whole.

Description

technical field [0001] The invention relates to a driving circuit of a laser, belonging to the field of optoelectronic technology. Background technique [0002] There are many types of lasers, such as solid-state lasers, gas lasers, semiconductor lasers, fiber lasers and so on. Among these lasers, except for some semiconductor lasers that are directly pumped by current, the rest of the lasers are basically pumped by the pump source, especially for high-power lasers, it is necessary to use a high-power drive circuit for pumping. The source is driven to generate high-power pump light, but in the prior art, different driving circuits are generally designed for different lasers, and general driving circuits are seldom applicable to other lasers through simple changes. Moreover, for the driving circuit of high-power lasers, the driving voltage generally required by high-power lasers is also relatively high. At this time, the transformer is not easy to design, mainly due to probl...

AI Technical Summary

Problems solved by technology

Among these lasers, except for some semiconductor lasers that are directly pumped by current, the rest of the lasers are basically pumped by the pump source, especially for high-power lasers, it is necessary to use a high-power drive circuit for pumping. The source is driven to generate high-power pump light, but in the prior art, different driving circuits are generally designed for different lasers, and general driving circuits are rarely applicable to other lasers through simple changes

Moreover, for the driving circuit of high-power lasers, the driving voltage generally required by high-power lasers is also relatively high. At this time, the transformer is not easy to design, mainly due to problems such as poor insulation, large parasitic capacitance, and large leakage inductance. In this way, the secondary device of the transformer in the circuit is not easy to select

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