Active Q-switched fiber laser with narrow line width, narrow pulse width and high repetition frequency

A high repetition rate, fiber laser technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of weakening the feedback strength of the resonator, difficulty in obtaining narrow pulse width Q-switching pulses, etc., and achieve self-saturation of weakening gain effect, narrow pulse width, narrow line width effect
CN110459939AActive Publication Date: 2019-11-15HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2019-11-15

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Abstract

The invention discloses an active Q-switched fiber laser with a narrow line width, a narrow pulse width and a high repetition frequency. The output port of a pump source is connected to the pump portof a pump fiber combiner; the common end of the pump fiber combiner is connected with one end of a first doped fiber; the other end of the first doped fiber is directly used as an input fiber of a first port of a pump stripper 4; the second port of the pump stripper is connected with the first port of a fiber coupler; the third port of the fiber coupler is connected with a first port of a modulator; the fourth port of the fiber coupler is used as a laser output port; the second port of the modulator is connected with the first port of a circulator; the third port of the circulator is connectedwith one end of a second doped fiber; and the other end of the second doped fiber is connected with the signal end of the pump fiber combiner. The pulse width of the Q-switched pulse is narrowed, therepetition frequency of the Q-switched pulse can also be greatly improved, and thus, high-repetition frequency, narrow-line width and narrow-pulse width Q-switched pulse output can be realized.
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Description

technical field

[0001] The invention relates to the technical field of high-energy nanosecond laser pulses, in particular to an active Q-switched fiber laser with narrow line width, narrow pulse width and high repetition frequency. Background technique

[0002] High-energy nanosecond laser pulses have extremely important applications in the fields of precision machining, laser radar, and nonlinear frequency conversion. Usually, such pulses are obtained by a MOPA system composed of a high-quality seed light source followed by a power amplifier, and the pulse seed sources mainly include directly modulated semiconductor lasers, Q-switched solid-state lasers, and fiber lasers. In contrast, Q-switched fiber lasers have the advantages of good beam quality, compact structure, high conversion efficiency, and little influence from subsequent power amplifiers, making them ideal seed sources for high-energy nanosecond laser pulses. At present, linear cavity Q-switched lasers based on ...

Claims

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