14 February 2007 Resonant doubler with a 2-THz automatic quasi-smooth scan range for widely tunable CW single-frequency lasers
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Abstract
In the present work, demonstrated for the first time is automatic quasi-smooth scanning of an resonant doubler cavity synchronously with the frequency of a CW auto-scanned Ti:Sapphire laser within a 1-THz frequency range (2 THz for second harmonic), which is limited only by the spectral acceptance bandwidth of non-linear crystal. Significant (more than by an order of magnitude) widening of the synchronous scanning range was achieved owing to the suggested method of automatic re-locking of the external cavity. The number of automatic cycles when the input frequency is relocked to different transmission peaks of the doubler cavity can be arbitrarily large, and the domain of automatic quasi-smooth frequency scanning that is composed of multiple smooth scanning ranges (~ few GHz wide). The doubler was tested with bow-tie-shaped ring cavity configuration and LBO/BIBO crystals. Doubling efficiency was in the range of 25-42% at input power of 0.7-2.1 W.
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Sergey Kobtsev, Sergey Kobtsev, Vladimir Lunin, Vladimir Lunin, "Resonant doubler with a 2-THz automatic quasi-smooth scan range for widely tunable CW single-frequency lasers", Proc. SPIE 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI, 645517 (14 February 2007); doi: 10.1117/12.699290; https://doi.org/10.1117/12.699290
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