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Blue laser via IR resonant doubling with 71% fiber to fiber efficiency

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Abstract

We report on high efficiency resonant doubling to 486nm using periodically poled KTP. The IR laser source is an FBG stabilized semiconductor laser with a maximum polarization maintaining (PM) fiber coupled output of 840mW. An output power of 680mW at 486nm was obtained from our optimized cavity, giving net efficiency of 81%. Also, we report an 87.5% net efficiency in coupling of this blue light from the servo locked cavity into a single-mode PM fiber. This gives a total of 71% fiber to fiber efficiency. Furthermore, a wall plug efficiency of 21.4% was obtained.

© 2011 Optical Society of America

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