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Gain-dependent wavelength-controlled and tunable ultra-short pulse laser generation method and device

A technology of ultra-short pulse laser and generation method, which is applied in the laser field, can solve problems such as poor stability and operability, complex structure, etc., and achieve the effect of ensuring compact structure and high reliability

Inactive Publication Date: 2020-08-07
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0010] In order to solve the technical problems of complex structure, poor stability and operability caused by independent femtosecond pump light source and a section of nonlinear optical fiber in the existing tunable laser generation process, the present invention provides a gain-dependent wavelength-dependent Controllable and tunable ultrashort pulse laser generation method and device

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  • Gain-dependent wavelength-controlled and tunable ultra-short pulse laser generation method and device
  • Gain-dependent wavelength-controlled and tunable ultra-short pulse laser generation method and device
  • Gain-dependent wavelength-controlled and tunable ultra-short pulse laser generation method and device

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[0044] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The principle of the invention: doped ytterbium ion gain fiber has complex radiation and absorption characteristics, such as figure 1As shown, where the radiation characteristics are reflected in the final laser gain, and the absorption characteristics are finally reflected in the reabsorption of laser light, which is equivalent to the laser loss characteristics. Laser oscillation at a certain wavelength is the result of a combination of gain and loss. Therefore, in the process of generation and amplification of ultrashort pulse laser, the oscillation and amplification at a certain wavelength of laser light mainly depend on the pump power, the working wavelength range of the laser device and the length of the gain fiber. Usually, the design of the laser oscillation cavity is specific, that is, the pump power and...

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Abstract

The invention provides a gain-dependent wavelength-controlled and tunable ultra-short pulse laser generation method and device, and solves the problems of complex structure and poor stability and operability in the existing tunable laser generation process. According to the method, the gain and loss control of the oscillation wavelength in a laser oscillation cavity is realized by regulating and controlling the length of ytterbium ion doped gain optical fiber, so that the output wavelength of an ultrashort pulse laser device is controlled and tunable, wherein the ytterbium ion doped gain optical fiber has both radiation characteristics and absorption characteristics. The device comprises a pump light source, and a wavelength division multiplexer, a chirped fiber bragg grating, a ytterbiumion doped gain optical fiber, a semiconductor saturable absorption mirror and an isolator which are sequentially connected to form a laser oscillation cavity, wherein the length of the ytterbium ion doped gain optical fiber adapts to the output wavelength of the ultrashort pulse laser device, the chirped fiber bragg grating is connected with the first signal output end of the wavelength division multiplexer, and the second signal output end of the wavelength division multiplexer is connected with the isolator.

Description

technical field [0001] The invention relates to laser technology, in particular to a gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device. Background technique [0002] As an important laser technology, femtosecond laser is irreplaceable in many fields such as strong field physics, attosecond science, material science and extreme manufacturing due to its extremely short duration and strong instantaneous power. Until now, scientific researchers are still developing towards the ultrafast and ultra-strong femtosecond laser with shorter pulse width, higher average power, greater single pulse energy, and stronger peak power, and are constantly pursuing the limit of ultrafast lasers. to meet specific application requirements. [0003] As an important direction of femtosecond laser research, wavelength tuning has important application value in the fields of time-resolved spectroscopy, quantum optics, nanoscience and atmospheric composi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/102H01S3/16
CPCH01S3/067H01S3/06716H01S3/0675H01S3/102H01S3/1618
Inventor 吕志国赵卫杨小君杨直王屹山李峰李强龙
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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