Multi-pass chirped fiber grating pulse broadening device
A chirped fiber grating and pulse stretching technology, which is applied in the direction of lasers, laser components, and the structure/shape of active media, can solve the problem of high cost of pulse stretching with large dispersion, and achieve compact structure, easy adjustment, and cost reduction Effect
Active Publication Date: 2014-08-13
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
The use of chirped fiber gratings for pulse stretching can achieve full fiber optics and make the system compact, and the stretching amount and price of chirped fiber gratings are proportional to the length of chirped fiber gratings, so the cost of pulse stretching with large dispersion higher
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[0032] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.
[0033] see first figure 1 , figure 1 It is a schematic diagram of the overall structure of the multi-pass chirped fiber grating pulse stretching device of the present invention. It can be seen from the figure that the composition of the multi-pass chirped fiber grating pulse stretching device of the present invention includes: a wide-spectrum signal source 1, a 2*2 acousto-optic modulator 2, a fiber circulator 3, a chirped fiber grating 4, a fiber isolator 5, Gain medium 6, wavelength division multiplexer 7, bandpass filter 8, master control trigger signal source 9, digital pulse delay generator 10, pump protector 11 and pump source 12, the connection relationship of the above components is as follows :
[0034] The first output end of said master control trigger signal ...
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Disclosed is a Multi-pass chirped fiber grating pulse broadening device for. The device comprises a wide-spectrum signal source, a 2*2 acoustic optical modulator, an optical fiber circulator, a chirped fiber grating, an optical fiber isolator, gain media, a wavelength division multiplexer, a band-pass filter, a general control trigger signal source, a digital pulse delay generator, a pumping protector and a pumping source. The device has the advantages that pulse broadening of large dispersion measures can be achieved through the short chirped fiber grating, the broadening amount can be adjusted freely by controlling the broadening times through gate signals generated by the digital pulse delay generator, and accordingly, the cost is reduced effectively, all-fiber is achieved, the structure is compact, and energy losses in a broadening process are compensated.
Description
technical field [0001] The invention relates to a wide-spectrum laser pulse, in particular to a multi-path chirped fiber grating pulse stretching device suitable for time stretching of the wide-spectrum laser pulse. Background technique [0002] In recent years, due to the emergence of high-power pump sources and the improvement of fiber manufacturing levels, fiber lasers are no longer limited to low-power levels. High-energy optical pulses are usually difficult to obtain directly from lasers, and one or more amplifiers are required to amplify the pulses from the outside. However, as the peak power of the pulse increases, the nonlinear effect in the amplifier will distort the pulse and limit the energy. zoom in. The chirped pulse amplification technology introduces chirp and broadens the pulse before the pulse is amplified, thereby effectively reducing the peak power of the pulse and realizing high-energy pulse amplification. The use of chirped fiber gratings for pulse str...
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IPC IPC(8): H01S3/067H01S3/117H01S3/10
Inventor 饶大幸汪小超张承涛郭跃姜有恩张生佳范薇
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI