2015 IEEE High Power Diode Lasers and Systems Conference (HPD) 2015
DOI: 10.1109/hpd.2015.7439670
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Passive coherent combining of two tapered laser diodes in an interferometric external cavity

Abstract: We demonstrate a rear-side phase-locking architecture with two high-brightness diode lasers. This technique is based on the passive phase-locking of emitters in an external cavity on their rear facet, and their coherent combination on the front facet. Two high-brightness high-power tapered laser diodes are coherently combined using a Michelson-based cavity. The combining efficiency is above 80% and results in an output power of 6.5 W in a nearly diffraction-limited beam.

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