Vertical surface emitting semiconductor device

Coherent light generators – Particular pumping means – Pumping with optical or radiant energy

Reexamination Certificate

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C372S071000, C372S072000, C372S075000, C372S050110

Reexamination Certificate

active

08000371

ABSTRACT:
A semiconductor light emitting device includes a pump light source, a gain structure, and an out-coupling mirror. The gain structure is comprised of InGaN layers that have resonant excitation absorption at the pump wavelength. Light from the pump light source causes the gain structure to emit light, which is reflected by the out-coupling mirror back to the gain structure. A distributed Bragg reflector causes internal reflection within the gain structure. The out-coupling mirror permits light having sufficient energy to pass therethrough for use external to the device. A frequency doubling structure may be disposed between the gain structure and the out-coupling mirror. Output wavelengths in the deep-UV spectrum may be achieved.

REFERENCES:
patent: 2005/0100074 (2005-05-01), Okazaki et al.
patent: 2008/0031289 (2008-02-01), Cho et al.
patent: 2008/0112443 (2008-05-01), Lee et al.
Schulz, N. et al., “Resonant In-Well Pumping of GaSb-Based VECSELs Emitting in the 2.X μm Wavelength Regime”, Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest Series (CD) (Optical Society of America, 2007), paper CMFF6.
Schulz, N. et al., “Resonant optical in-well pumping of an (AIGaln)(AsSb)-based vertical-external-cavity surface-emitting laser emitting at 2.35 micrometers”, App Phys Let, vol. 91, 091113 (2007).
Lee, J, et al., “7 W high-efficiency continuous-wave green light generation by intracavity frequency doubling of an end-pumped vertical external-cavity surface emitting semiconductor laser”, App Phys Let, vol. 89, 241107 (2006).
Schulz, N. et al., “An improved active region concept for highly efficient GaSb-based optically in-well pumped vertical-external-cavity surface-emitting lasers”, App Phys Let, vol. 93, 181113 (2008).
“Publishable Final Activity Report”, Nano-Photonics Materials and Technologies for Multicolor High-Power Sources (NATAL), IST-NMP 016769 (2008).

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