High-power 390-nm laser source based on efficient frequency doubling of a tapered diode laser in an external resonant cavity |
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Authors: | Bhawalkar J D Mao Y Po H Goyal A K Gavrilovic P Conturie Y Singh S |
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Institution: | Polaroid Corporation, Cambridge, Massachusetts 02139, USA. |
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Abstract: | We frequency doubled the single-frequency beam from an external-cavity tapered laser diode operating at 780 nm in a resonant cavity containing a beta -barium borate crystal to generate an output at 390 nm with high efficiency. Output powers as great as 233 mW were obtained, corresponding to an efficiency of 65%/W . The resonant-cavity design was a low-loss three-mirror configuration that provided compensation for astigmatism and coma. The laser diode frequency was locked to the doubling-cavity resonance by use of the H?nsch-Couillaud discrimination technique. |
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