976nm 130W Wavelength-Stabilized Fiber Coupled Diode Laser

Since the semiconductor laser has a wide gain curve, a wide luminous zone, and supports many modes, and each mode has a different frequency, the output spectrum of the semiconductor laser is wide. At the same time, the output spectrum of the semiconductor laser will also change with slight changes in temperature or driving current, causing the center wavelength of the output light to drift and the spectrum width to change. At present, the fiber lasers used on a large scale use ytterbium-doped active fibers, which have two absorption peaks near 915nm and 976nm. The absorption peak near 915nm corresponds to a low absorption rate but a wide absorption range, and the absorption peak near 976nm corresponds to a high absorption rate but a narrow absorption range. Therefore, when using a semiconductor laser with a luminous center wavelength of 976nm as a pump source for a fiber laser, wavelength locking is required so that the semiconductor laser can stably output light of a suitable center wavelength and narrow the output spectrum width. For solid lasers and gas lasers with narrow absorption peaks, especially gas lasers with an absorption zone width of less than 1nm, it is also necessary to wavelength lock the semiconductor laser when using a semiconductor laser as a pump source so that the semiconductor laser can stably output light of a suitable center wavelength and narrow the output spectrum width.