The emission spectrum of a 10-W commercial broad-area laser was narrowed and stabilized by coupling a portion of its far-field emission to a single-mode fiber Bragg grating. The feedback produced in this external cavity configuration stabilized the peak wavelength of the laser with respect to temperature and produced a narrow spectrum compatible with pumping ytterbium-doped fiber lasers. The spectral narrowing was achieved at multiple far field locations and stabilized over a wide temperature band, indicating a robust and manufacturable design. This proof-of-concept experiment can be translated into a pump delivery fiber configuration that integrates the diode feedback into a pump system package for spectrally bright pumping.
Jose C. Perez, Jordan P. Leidner, and John R. Marciante, "Spectral narrowing and stabilization of 10-W broad-area laser with fiber pump delivery system (Conference Presentation)," Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 105140R (Presented at SPIE LASE: January 30, 2018; Published: 14 March 2018); https://doi.org/10.1117/12.2287937.5751425820001.
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