Method for improving pumping efficiency of fiber laser and fiber laser thereof
A fiber laser, pumping efficiency technology, applied in the structure/shape of the optical resonator, the structure/shape of the active medium, etc., can solve the problem of low absorption rate of pump light, large loss of signal light, and obstacles to full absorption of pump laser light and other issues to achieve the effect of improving absorption utilization efficiency and reducing total power
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[0020] The preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing:
[0021] Such as figure 1 The fiber laser shown in the optical path sequentially includes a front-stage low-power laser source 1, a plurality of semiconductor pump lasers 2, a fiber beam combiner 3, an active double-clad fiber 4, a pump light reflector 5, an output Isolator / collimator6. In this embodiment, the pre-seed laser source 1 is composed of a semiconductor laser with a center wavelength of 1060nm and a low-power fiber amplifier; the pump laser source 2 is composed of 6 center wavelengths of 915nm and an output fiber with a numerical aperture of 105um / 125um and an output power of 10W. Composed of semiconductor lasers; the fiber beam combiner 3 is a pump light / signal light beam combiner with a 6+1 x 1 structure, and the active double-clad fiber 4 is ytterbium (Yb + ) Doped fiber with a diameter of 25um / 250um. The pre-stage low-power lase...
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