Low-threshold-value femtosecond pulse fiber laser
A fiber laser, femtosecond laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of unimproved polarization state, reduce diffraction loss, avoid the reduction of optical path height, and improve stability. Effect
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art.
[0033] A low-threshold femtosecond pulsed fiber laser such as figure 1 As shown, the femtosecond laser (100) adopts a half-space half-fiber ring cavity structure.
[0034] The femtosecond laser 100 is composed of a fiber-coupled semiconductor laser 101, a wavelength division multiplexer 102, an ytterbium-doped single-mode gain fiber 103, an output fiber collimator 104, an incident fiber collimator 105, a first quarter A glass slide 106, a first half-wave plate 107, a polarizing beam splitter 108, a Faraday rotator 109, a second half-wave plate 110, a first reflective grating 111, a second reflective grating 112, and mirrors 113 , an optical isolator 114 , and a second quarter slide 115 .
[0035] The Faraday rotator 109 and the second half-wave plate 110 are the most critical...
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