Semiconductor laser array in an external Talbot cavity

Robert G. Waarts; Derek W. Nam; David F. Welch; David G. Mehuys; William J. Cassarly; John C. Ehlert; J. Michael Finlan; Kevin M. Flood

doi:10.1117/12.59148

26 June 1992 Semiconductor laser array in an external Talbot cavity

Robert G. Waarts, Derek W. Nam, David F. Welch, David G. Mehuys, William J. Cassarly, John C. Ehlert, J. Michael Finlan, Kevin M. Flood

Author Affiliations +

Proceedings Volume 1634, Laser Diode Technology and Applications IV; (1992) https://doi.org/10.1117/12.59148
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

This paper describes semiconductor laser arrays placed in an external Talbot cavity. The external Talbot cavity couples the light between many adjacent lasers such that all lasers operate at the same frequency and phase, resulting in a high power diffraction limited output beam. We designed a compact cavity which is comprised of a 30 by 50 element monolithic 2-D laser array, a GaP mass transport lens array, a liquid crystal array, a phase sensing and control system and a waveguide. Initial results obtained from a 20 element linear Ta1bOt cavity with a calculated mode discrimination similar to the 2-D cavity demonstrate in excess of 30 mW cw per laser element in a diffraction limited far field. In addition we have also demonstrated 50 Watt CW incoherent output power from a monolithic 2D laser array

Citation Download Citation

Robert G. Waarts, Derek W. Nam, David F. Welch, David G. Mehuys, William J. Cassarly, John C. Ehlert, J. Michael Finlan, and Kevin M. Flood "Semiconductor laser array in an external Talbot cavity", Proc. SPIE 1634, Laser Diode Technology and Applications IV, (26 June 1992); https://doi.org/10.1117/12.59148

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