A femtosecond-level ultra-flat supercontinuum laser acquisition method
A supercontinuum laser and supercontinuum technology, applied in the field of pulsed laser generation, can solve problems such as inability to adapt to wide-spectrum accurate quantitative analysis, and achieve the effect of meeting the needs of precise wide-spectrum quantitative analysis
Active Publication Date: 2019-04-02
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] However, in some applications that require precise quantitative analysis of wide spectra, the current supercontinuum laser sources are not competent, because the existing supercontinuum laser sources have some problems in the output spectrum flatness and stability and other technical indicators, and cannot Adapt to the requirements of wide-spectrum accurate quantitative analysis
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[0031] The specific embodiment of the present invention is as figure 1 shown.
[0032] The structure of the supercontinuum laser with high output spectral flatness and stability proposed by the present invention is as follows: figure 1 As shown, the supercontinuum laser is composed of a controller 1, a pump source module 2, a ring laser module 22 and a supercontinuum generation and monitoring module 32.
[0033] The pump source module 2 is used to generate the multi-wavelength pulsed seed laser light of the ring laser assembly 22 . It includes a power regulator 3, a first pulse generator 4, a first shaping amplifier 5, a first laser tube drive circuit 42, a second pulse generator 9, a second shaping amplifier 10, a second laser tube drive circuit 43, a Three pulse generators 14, the third shaping amplifier 15, the third laser tube drive circuit 44, three-in-one optical fiber 19, the first polarization controller 20 and optical isolator 21; wherein the first laser tube drive ...
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The invention discloses a femtosecond ultra-flattened supercontinuum laser obtaining method. The method is achieved on a supercontinuum laser device with ultra-flattened spectrum output. The method comprises a wavelength selection step, a seed laser generation step, a seed laser power amplification step, a laser compression and re-amplification step, a supercontinuum generating and monitoring step, a seed laser power adaptive adjustment step and the like. The femtosecond ultra-flattened supercontinuum laser obtaining method has the beneficial effects that in a feedback amplitude-modulated multi-wavelength laser pumping manner, the strength of a multi-wavelength pump laser light is adaptively adjusted by combining wide spectrum monitoring; supercontinuum laser output with high output spectrum flatness and stability is achieved through superposition; and the requirements of accurate wide-spectrum quantitative analysis are met.
Description
technical field [0001] The invention relates to a pulsed laser generation method, in particular to a femtosecond-level ultra-flat supercontinuum laser acquisition method based on feedback amplitude modulation multi-wavelength laser pumping. Background technique [0002] Supercontinuum laser means that when the pump laser passes through a special optical waveguide, a series of nonlinear effects cause the spectrum of the incident laser beam to broaden, thereby outputting a wide-spectrum laser beam—called a supercontinuum. Especially with the development of ultrafast laser and photonic crystal fibers (PCF for short) technology, the use of ultrashort pulse propagation in PCF to generate supercontinuum light has become a topic of worldwide concern. This technique requires only very low pulse energies (about 1nJ) to generate supercontinuum light, and the resulting supercontinuum light is coherent and bright -- making it an ideal white light source. [0003] Supercontinuum lasers ...
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IPC IPC(8): H01S3/067H01S3/0941H01S3/10H01S3/13
CPCH01S3/06716H01S3/06754H01S3/0941H01S3/10015H01S3/1305
Inventor 万雄刘鹏希章婷婷
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI