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Proceedings Paper

Development of orientation-patterned GaP grown on foreign substrates for QPM frequency conversion devices
Author(s): Shivashankar Vangala; Rita Peterson; Michael Snure; Vladimir Tassev
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Paper Abstract

Thick hydride vapor phase epitaxially grown orientation-patterned gallium phosphide (OPGaP) is a leading material for quasi-phase matching (QPM) frequency conversion in the mid- and longwave infrared (IR). This is due to its negligible two-photon absorption (2PA) in the convenient pumping range 1 – 1.7 μm, compared with the 2PA of some traditional QPM materials, such as GaAs. In this paper, we describe homo- and heteroepitaxial growth techniques aimed to produce hundreds of microns thick OPGaP on: 1) OPGaAs templates fabricated using an improved wafer-fusion process; 2) OPGaAs templates fabricated by using a molecular beam epitaxy (MBE) for sublattice polarity inversion, but one with and one without MBE regrowth after the inversion. Some of the advantages of the heteroepitaxial growth of OPGaP on OPGaAs templates include: 1) achieving good domain fidelity as a result of the significantly higher OPGaAs template quality; 2) eliminating the needs of using the poor quality commercially available GaP in the production of thick OPGaP material, and 3) suppression of the additional absorption band between 2 – 4 μm (which is due to incorporation of n-type impurities) and, in general, improvement of the IR transmittance in the entire IR region. Combining the advantages of the two most promising nonlinear materials, GaAs and GaP, will accelerate the development of high power, broadly tunable laser sources in the IR which, in addition, will be offered with higher device quality and at a reasonably lower unit cost.

Paper Details

Date Published: 20 February 2017
PDF: 8 pages
Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 100880U (20 February 2017); doi: 10.1117/12.2250639
Show Author Affiliations
Shivashankar Vangala, Air Force Research Lab. (United States)
Azimuth Corp. (United States)
Rita Peterson, Air Force Research Lab. (United States)
Michael Snure, Air Force Research Lab. (United States)
Vladimir Tassev, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 10088:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVI
Konstantin L. Vodopyanov; Kenneth L. Schepler, Editor(s)

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