Master oscillator power amplifier 3D assemblies based on grating coupled laser diodes
O.V. Smolskia, J.K. O’Danielb, E.G. Johnsona, P. Leisherc, P. Crumpd
Published in:
Proc. SPIE, vol. 6909, no. 690919 (2008).
Abstract:
We report on novel architectures of the hybrid master oscillator power amplifier (MOPA) assemblies incorporating vertically stacked surface-emitting laser diodes. Optical coupling between the MO and the PA is provided by nonresonant grating couplers integrated on both of the devices. The MOPA consists of a MO chip with dual grating reflector for single wavelength operation and a flared PA chip with two grating outcouplers. Optical peak power over 100W and spectral bandwidth of 0.2nm were achieved from the single MOPA while the MO operated in the gain-switching regime and the PA operated as a traveling wave amplifier. New designs of coherent MOPA arrays are proposed based on a phase locked MO bar and a single transverse mode PA bar. This MOPA assembly requires an optical cross-coupling between the bars provided by tilted gratings which have been developed and experimentally evaluated.
a Optoelectronics Center, Univ. of North Carolina at Charlotte, NC USA 28223
b Photodigm, Inc., 1155 E Collins Blvd #200, Richardson, TX USA 75081
c nLight Corp, 5408 NE 88th Ste, Bldg E, Vancouver, WA, USA 98665
d Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
Keywords:
high power diode laser, tapered amplifier, grating couplers, master oscillator power amplifier.
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