17 August 1998 Improvement of the oscillation mode of the broad-area diode lasers by injection locking with photorefractive mutually pumped phase conjugators
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Abstract
Single longitudinal mode operation of 1 W class broad-area diode lasers are achieved with phase conjugate injection locking technique. We adopted two stage injection scheme because the final output power is limited by the power of the injection beam. First, we locked a broad-area laser by the output beam from a single mode diode laser of the output power of 40 mW. We obtain 550 mW output from the broad-area laser with single longitudinal mode. Spatial pattern of the slave lasers are greatly improved by mode selection with the spatial filters at the far field between the lasers and phase conjugate mirrors. We also analyze the transverse oscillation modes in broad-area laser under locking conditions by numerical modeling. We can explain the near field and far field pattern in our experiment with our model.
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Tsutomu Shimura, Hisaki Horiuchi, Ken-ichi Iida, Osamu Matoba, Takashige Omatsu, Kazuo Kuroda, "Improvement of the oscillation mode of the broad-area diode lasers by injection locking with photorefractive mutually pumped phase conjugators", Proc. SPIE 3554, Photorefractive Materials: Phenomena and Related Applications II, (17 August 1998); doi: 10.1117/12.318137; https://doi.org/10.1117/12.318137
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