High-brightness emission from stripe-array broad area diode lasers operated in off-axis external cavities | Zendy

Andreas Jechow | Zendy; Danilo Skoczowsky | Zendy; Mark Lichtner | Zendy; Mindaugas Radziunas | Zendy; Ralf Menzel | Zendy

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High-brightness emission from stripe-array broad area diode lasers operated in off-axis external cavities

Author(s) -

Andreas Jechow,

Danilo Skoczowsky,

Mark Lichtner,

Mindaugas Radziunas,

Ralf Menzel

Publication year - 2010

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.843047

Subject(s) - laser , brightness , optoelectronics , semiconductor laser theory , diode , materials science , optics , physics

Phase-coupled stripe-array diode lasers show a strong double-lobed far-field because adjacent stripes tend to operate in the anti-phase supermode. One way to achieve a stable phase relationship and global coupling of the emitters of such a stripe-array is off-axis feedback. In this work several off-axis external cavity designs are discussed. A 400 孠wide emitter stripe array consisting of 40 stripes with a pitch of 10 孠was investigated. By operating this device in a Littrow type off-axis external cavity, more than 2 W of output power of near diffraction-limited, single longitudinal mode emission with a brightness as high as 87MW/cm⭳tr could be achieved. The technique of off-axis feedback was also adapted to realize spectral beam combining of 25 emitters of a laser bar. The experimental data are compared with numerical simulations using a new theoretical model including feedback.Full Tex

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