Coherent light generators – Particular resonant cavity
Reexamination Certificate
2011-05-24
2011-05-24
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular resonant cavity
C372S098000, C372S099000
Reexamination Certificate
active
07949031
ABSTRACT:
A semiconductor diode laser having a broad vertical waveguide and a broad lateral waveguide is disclosed emitting laser-light in a single vertical mode and a single lateral mode narrow beam. The vertical waveguide comprises a coupled cavity structure, wherein light, generated in the active medium placed in the first cavity leaks into the second cavity and returns back. Phase matching conditions govern the selection of a single vertical mode. A multi-stripe lateral waveguide comprises preferably a lateral photonic band crystal with a lateral optical defect created by selected pumping of multistripes. This approach allows the selection of a single lateral mode having a higher optical confinement factor and/or a lower absorption loss and/or a lower leakage loss compared to the rest lateral optical modes. This enables a single lateral mode lasing from a broad area field coupled laser array. A laser system comprised of multiple field coupled laser arrays on a single wafer and a set of external mirrors enables an ultra-broad field coupled laser bar emitting a coherent laser light in a single vertical optical mode and a single lateral optical mode. A laser system comprised of multiple ultra-broad field coupled laser bars on different wafers and a set of external mirrors enables an ultra-broad field coupled laser stack emitting coherent laser light in a single vertical optical mode and a single lateral optical mode. This allows realization of ultrahigh power ultrahigh brightness laser systems based on semiconductor diode lasers.
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Ledentsov Nikolai
Shchukin Vitaly
Harvey Minsun
KED & Associates LLP
Nguyen Phillip
PBC Lasers GmbH
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