780 nm high-power optical-fiber femtosecond laser device

A technology of femtosecond lasers and lasers, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of reducing the quality and difficulty of pulse compression, and achieve the reduction of nonlinear effects, reduction of welding and coupling losses, and high quality The effect of pulse compression on
CN104283097AInactive Publication Date: 2015-01-14SHANGHAI LANGYAN OPTOELECTRONICS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI LANGYAN OPTOELECTRONICS TECH
Publication Date
2015-01-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a 780 nm high-power optical-fiber femtosecond laser device. The laser device comprises a laser device seed source, a laser spreading and amplifying module, a laser compression module and a laser frequency doubling module, the laser device seed source and the preceding modules are sequentially connected, the laser spreading and amplifying module is composed of a chirped pulse spreading sub module, a pulse separation sub module and an optical fiber amplifying sub module, and the laser device seed source and the modules all work at the waveband of 1560 nm. A mixed pulse spreading mode is adopted, pulses are spread from 100 fs to 1ns in a small work space, the amplified pulses are compressed to below 100 fs through non-linear compression of a single-mode fiber, and ultimately the pulses reach 780 nm after frequency doubling of non-linear crystals. The laser device has the advantages of being high in stability, simple in structure, small and ingenious in size, low in cost and the like.
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Description

technical field

[0001] The invention relates to the technical field of high-energy lasers, in particular to a 780nm high-power fiber laser. Background technique

[0002] The 780nm femtosecond laser source is used for supercontinuum spectrum generation, optical microscopic imaging, excited terahertz generation, pump-probe ultrafast process research, nonlinear laser spectroscopy, femtosecond micro-nano fine processing, ultrafast dynamics detection of materials, etc. Ideal light source.

[0003] The 780nm femtosecond pulse light source is traditionally mainly provided by Ti:Sapphire laser. However, Ti:Sapphire lasers are bulky and expensive, and are mainly used in laboratory environments. And because the Ti:Sapphire laser loses mode-locking, professionals are required to adjust the mode-locking. In addition, various precision optical components used in Ti:sapphire lasers require an environment with constant humidity, and the stability of the laser resonator also requires cer...

Claims

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