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A wide-repetition-frequency adjustable high-power ultrashort pulsed fiber laser is disclosed

A fiber laser and fiber grating technology, applied in the field of lasers, can solve the problems of low repetition rate adjustable range, inability to adjust, large and complex pulse width system, etc., and achieve the effect of shortening the length, reducing the number, and widening the adjustment range

Pending Publication Date: 2019-01-25
光越科技(深圳)有限公司
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Problems solved by technology

The method of active mode locking is to add active modulation devices such as acousto-optic and electro-optic in the resonator, so the pulse width will be limited by the electrical bandwidth and the system is huge and complex, and the adjustable range of its repetition frequency is also very low; the passive mode locking method is to use Saturable absorber, using its nonlinear saturable absorption characteristics to obtain ultrashort pulses, can realize very short pulse output, but its repetition frequency is determined by the cavity length of the resonant cavity, and cannot be adjusted in the cavity

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  • A wide-repetition-frequency adjustable high-power ultrashort pulsed fiber laser is disclosed

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Embodiment Construction

[0017] The invention will be further described in detail according to specific embodiments and accompanying drawings.

[0018] The technical scheme of the present invention application of the present invention is:

[0019] A wide repetition frequency adjustable high power ultrashort pulse fiber laser of the present invention adopts a linear short cavity structure, including a main amplification system 40, an ultrashort pulse fiber laser seed source system 41, a primary pulse selection system and a secondary pulse selection system system, the main amplification system 40 includes a first-stage amplification unit and a second-level amplification unit; the first-order amplification unit includes two multimode pump lasers 1001, 1002, (2+1)x1 optical beam combiner 11 , a double-clad gain fiber 12 and an optical isolator 805; two multimode pump lasers (1001, 1002) are respectively connected to one end of the (2+1)x1 optical beam combiner 11, and the (2+1)x1 optical beam combiner Th...

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Abstract

It is an object of the present invention to provide a tunable high-power ultrashort pulse fiber laser, A passively mode-locked fiber laser with short resonator structure generates ultrashort pulsed laser signal with high repetition rate, The output signal is preamplified into the second acousto-optic pulse selection module to carry out the second pulse selection, and the frequency adjustable rangeis greatly increased. The first pulse selection is realized by the acousto-optic pulse selection module. The output signal is amplified to high power by the MOPA structure of pre-amplification and two-stage main amplification, and then the high power ultrashort pulsed fiber laser with wide repetition rate range is obtained.

Description

Technical field: [0001] The invention relates to a laser, in particular to a wide repetition frequency adjustable high power ultrashort pulse fiber laser. Background technique: [0002] Lasers play an increasingly important role in people's modern work and life, and have great economic value and social benefits. High-power ultra-short pulse fiber laser has the advantages of good beam quality, high efficiency, good heat dissipation, compact structure, flexible operation, and no maintenance. Wide range of applications has attracted the attention of researchers. At present, the main method of obtaining high-power ultrashort pulse fiber laser is to obtain a low-power seed source through gain switching, active mode-locking, and passive mode-locking methods, and then amplify the main oscillation power of the seed light (MOPA, master oscillator power amplifier) Technology to achieve laser signal output with high pulse energy, high peak power and average power. [0003] In the ab...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/0941H01S3/102H01S3/106H01S3/098
CPCH01S3/06716H01S3/0675H01S3/06754H01S3/0941H01S3/1024H01S3/1068H01S3/1118
Inventor 袁易君龙跃金张剑宇曾文康杨武
Owner 光越科技(深圳)有限公司
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