An electrical control structure and method for a MOPA structure laser

By setting up an intensity sensor in the MOPA structure laser to control the switching sequence of the pump tube, the self-excitation problem caused by insufficient light intensity was solved, the optical path devices were protected, and safe laser transmission was achieved.

CN116526266BActive Publication Date: 2026-03-10HUNAN DAKE LASER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-08
Publication Date
2026-03-10

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Abstract

This invention discloses an electrical control structure for a MOPA-structured laser. The electrical control structure ensures that the pump tube's turn-on signal sequence must satisfy out0->out1->out2, and the resulting photoelectric signal must also satisfy pd0->pd1->pd2. This overcomes the problem in existing MOPA-structured lasers where the next-stage pump tube is turned on before the light intensity is sufficient, leading to self-excitation in the optical fiber. Simultaneously, this electrical control structure also ensures that the pump tube's turn-off signal sequence must satisfy out2->out1->out0, and the subsequent disappearance photoelectric signal must also satisfy pd2->pd1->pd0. This overcomes the problem in MOPA-structured lasers where the previous-stage pump tube is turned off before the next-stage light is turned off, causing self-excitation in the optical fiber.
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