Mode-locked optical fiber laser which takes lead selenide quantum dot as saturable absorber
A technology of fiber lasers and absorbers, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of fiber laser compatibility difficulties, affecting coupling efficiency, etc., and achieve fast time response, low preparation cost, and quantum confinement Obvious effect
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Embodiment 1
[0024] Embodiment 1: the filter 5 is made up of a chirped fiber Bragg grating and a fiber circulator with a center wavelength of 1064nm and a bandwidth of 5nm; the first excitonic absorption peak of the fiber saturable absorber 6 is 1064nm; the core diameter of the connecting fiber 7 is 6μm, with an outer diameter of 125μm. It can realize picosecond laser output with a center wavelength near 1064nm.
Embodiment 2
[0025] Embodiment 2: The filter 5 is composed of a chirped fiber Bragg grating and a fiber circulator with a center wavelength of 1550nm and a bandwidth of 5nm; the first excitonic absorption peak of the fiber saturable absorber 6 is 1550nm; the connecting fiber 7 adopts a model of SMF -28 ordinary single-mode communication fiber. It can realize femtosecond laser output with a center wavelength near 1550nm.
Embodiment 3
[0026] Embodiment 3: the filter 5 is made up of a chirped fiber Bragg grating and a fiber circulator with a center wavelength of 1940nm and a bandwidth of 5nm; the first excitonic absorption peak of the fiber saturable absorber 6 is 1940nm; the core diameter of the connecting fiber 7 is 10μm, with an outer diameter of 125μm. It can realize femtosecond laser output with a center wavelength near 1940nm.
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