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Narrow linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and adjustable repetition frequency

An ultra-short pulse, amplification system technology, applied in the laser field, can solve problems such as increased processing cost, and achieve the effects of good stability, cost reduction and high integration

Active Publication Date: 2017-07-28
杭州奥创光子技术有限公司
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  • Abstract
  • Description
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Problems solved by technology

If different lasers are used for different materials, the processing cost will inevitably be greatly increased

Method used

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  • Narrow linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and adjustable repetition frequency

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Embodiment Construction

[0017] The content of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] figure 1 An example of the invention is given. The laser repetition frequency output by the narrow-linewidth mode-locked fiber laser oscillator 1 is 30MHz, the spectral line width is less than 0.1nm, the pulse width is 25ps, and the power is 20mW; the single-mode fiber amplifier is amplified by the single-mode pumped semiconductor laser Composed of device 3 and ytterbium-doped single-mode fiber 4 (core diameter 6 μm, cladding diameter 125 μm), amplified by a single-mode fiber amplifier, after amplification, due to the nonlinear spectral broadening of the fiber, the signal spectral width after single-mode amplification becomes 0.3 nm, the output end of which is connected to the multiplexer optical switch 6 through the first optical fiber isolator 5 . The multi-channel switching optical switch 6 is a 1*4 optical switch, including one input termi...

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Abstract

A narrow-linewidth all-fiber ultrashort pulse amplification system with adjustable pulse width and adjustable repetition frequency. The invention belongs to the field of laser technology, and is a narrow-linewidth all-fiber ultrashort pulse laser amplification system with adjustable pulse width and adjustable repetition frequency. The amplification system includes sequentially connected narrow-linewidth picosecond mode-locked laser oscillators, single Mode fiber amplifier, first fiber isolator, optical switch capable of multi-channel switching, multiple fiber circulators connected to chirped fiber gratings, fiber coupler, first double-clad fiber amplifier, second fiber isolator, An acousto-optic modulator and a second double-clad fiber amplifier emitting radio frequency signals of different repetition frequencies, wherein the input ends of each fiber circulator are respectively connected to different output ends of an optical switch, and each fiber circulator is connected to a chirped fiber grating, The dispersion coefficient of each chirped fiber grating is different. The invention can output high-energy ultrashort pulse lasers with different pulse widths and different repetition frequencies according to needs.

Description

[0001] Technical field: [0002] The invention belongs to the field of laser technology, and relates to an all-fiber pulse laser amplification system, in particular to an ultrashort pulse laser amplification system with adjustable pulse width and adjustable repetition frequency, narrow line width and large energy. [0003] Background technique: [0004] In coherent beam combining, nonlinear frequency conversion, radar, etc., pulsed lasers with high power, high beam quality, and narrow linewidth are required. The fiber laser has the advantages of small size, high integration, good stability, and no debugging, coupled with the maturity of pulse stretching technology and double-clad fiber drawing technology with large mode field, so that high-power ultrashort pulse laser can be used in optical fiber realized in. [0005] Ultra-short picosecond lasers have increasingly shown their own advantages in the field of laser micromachining, and have been successfully used in the manufactu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/0941G02F1/39
Inventor 李峰杨直张挺王屹山
Owner 杭州奥创光子技术有限公司
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