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Multi-wavelength femtosecond Raman fiber laser

A fiber laser, multi-wavelength technology, applied in the field of lasers, to achieve the effect of wide spectral width

Inactive Publication Date: 2018-10-16
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention aims at the problem that fiber femtosecond lasers cannot realize ultrashort pulse output at multiple wavelengths respectively, and proposes a multi-wavelength femtosecond Raman fiber laser to realize high-power multi-wavelength femtosecond laser output

Method used

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  • Multi-wavelength femtosecond Raman fiber laser

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Embodiment Construction

[0017] Such as figure 1 The structure schematic diagram of the multi-wavelength femtosecond laser is shown, and the signal is transmitted sequentially through the laser oscillation part 100 (seed light source part), the pre-amplification part 200, the pulse width control part 300, the main amplification part and the compression part 400.

[0018] Such as figure 2 The schematic diagram of the structure of the pre-amplification part is shown, and the pre-amplification part 200 is a multi-stage cascade amplifier part. The multi-stage cascaded amplifying part can be divided into a first-stage cascaded amplifying part, a second-stage cascading amplifying part to an Nth-stage cascading amplifying part. The first-stage cascaded amplifying section includes a first optical isolator 201, a first optical wavelength division multiplexer 202, a first doped optical fiber 204 connected in sequence, and pump light is provided to the first optical wavelength division multiplexer 202 The pum...

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Abstract

The invention relates to a multi-wavelength femtosecond Raman fiber laser. According to an adopted self-similarity pulse amplification method, a non-linear effect in optical fibers is utilized actively, and by adjusting the peak value in pulses in a pulse width control part, the main amplifying part laser has higher peak value, thereby triggering a high-order Raman effect, expanding pulse spectrum, and obtaining multi-order stokes and anti-stokes radiation to realize multi-wavelength output; and finally, the multi-wavelength femtosecond laser with central wavelength of 1,030nm and a spectral region of 860-1,330nm is obtained. In the high-power amplification engineering, each stokes and anti-stokes radiation has relatively high strength, so that the obtained laser of each wavelength has super-high peak value, relatively wide spectrum width and femtosecond-scale time width, which are advantages un-possessed by other multi-wavelength lasers.

Description

technical field [0001] The invention relates to a laser, in particular to a multi-wavelength femtosecond Raman fiber laser. Background technique [0002] Today's fiber lasers play a particularly important role in the development of lasers because of their good compatibility with fiber optic devices, good beam quality, and low cost. As a light source that can output multi-wavelength laser light, multi-wavelength fiber lasers have broad application prospects in optical fiber transmission, optical detection, and optical fiber communication systems. Ultrafast fiber lasers such as femtosecond fiber lasers have more advantages such as high single pulse energy and small heat-affected area. Therefore, it is more used in various fields such as micro-nano processing, medical surgical devices, super-resolution imaging, and mid-to-far infrared remote sensing. At present, there are few domestic reports on high-energy ultrafast fiber lasers that can achieve multi-wavelength output, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/00H01S3/11
CPCH01S3/0057H01S3/06708H01S3/06758H01S3/11
Inventor 袁帅徐晖周峰全王莉荣聂源曾和平
Owner UNIV OF SHANGHAI FOR SCI & TECH
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