Ultra-short pulse fiber laser system using graphene saturable absorber to lock mode

A fiber laser, ultra-short pulse technology, used in the field of lasers

Inactive Publication Date: 2016-06-22
WUHU ANRUI LASER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are samples of Er-doped femtosecond fiber laser with graphene film, but there is no sample of Yb-doped femtosecond fiber laser with graphene film.

Method used

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  • Ultra-short pulse fiber laser system using graphene saturable absorber to lock mode
  • Ultra-short pulse fiber laser system using graphene saturable absorber to lock mode

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Embodiment Construction

[0016] The present invention will be further described below with reference to the accompanying drawings and in conjunction with the embodiments.

[0017] refer to figure 1 and figure 2 , the ultra-short pulse fiber laser system of the present invention is mode-locked with a graphene saturable absorber, which is mainly composed of a ring fiber laser seed source and a chirped amplifier. The desired ultrashort pulse (femtosecond pulse) is obtained after amplification and dechirping.

[0018] Specific as figure 1 As shown, the ring fiber laser seed source includes a graphene saturable absorber 1, a wavelength division multiplexer 2 connected to an LD pump 4, a Yb-doped active fiber 3, a first passive fiber 5, an output coupler 6, a band Pass filter 7, optical isolator 8 and the second passive fiber 9, graphene saturable absorber 1, wavelength division multiplexer 2, Yb-doped active fiber 3, the first passive fiber 5, output coupler 6, The bandpass filter 7, the optical isola...

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Abstract

The invention discloses an ultra-short pulse fiber laser system using a graphene saturable absorber to lock a mode. The ultra-short pulse fiber laser system comprises a ring fiber laser seed source and a chirped amplifier, wherein the ring fiber laser seed source comprises the graphene saturable absorber, a wavelength division multiplexer, a Yb doped active fiber, a first passive fiber, an output coupler, a band-pass filter, an optical isolator and a second passive fiber; the chirped amplifier comprises a first-stage stretcher, a first-stage amplifier and a negative dispersion element; and the first-stage amplifier is composed of an active fiber, a beam combiner and a pumping source. The ring fiber laser seed source provided by the invention can output linearly chirped pulses, and these linearly chirped pulses can be amplified and de-chirped under the amplification of the chirped amplifier and the compensation action of the negative dispersion element, so as to obtain femtosecond pulses, and a Yb doped femtosecond fiber laser can be realized. The ultra-short pulse fiber laser system using the graphene saturable absorber to lock the mode provided by the invention fills the technical gap of the Yb doped femtosecond fiber laser.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an ultra-short pulse fiber laser system mode-locked with a graphene saturated absorber. Background technique [0002] Ultra-short pulse (pulse width less than 10ps) processing is cold processing, which eliminates the thermal effect on the surrounding area of ​​processing and improves processing accuracy, while high power helps to increase processing speed. Based on the above advantages, ultrashort pulse processing has gradually been applied in the field of micromachining. In order to meet the needs of the application, it is urgent to develop a high-power ultrashort pulse fiber laser. [0003] At present, the best way to produce ultrashort (femtosecond) fiber laser is to use passive saturable absorber plus gain fiber. In the past, semiconductor saturable absorber mirror (SESAM) was often used as a saturable absorber. Its disadvantage is that it requires complex processes, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/098H01S3/067
CPCH01S3/1118H01S3/06754
Inventor 李丰黄伟谈根林张巍巍刘洋
Owner WUHU ANRUI LASER TECH CO LTD
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