Coherent light generators – Particular resonant cavity – Specified cavity component
Patent
1993-01-27
1994-11-15
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Specified cavity component
372 50, 372 97, 372 19, H01S 319
Patent
active
053655419
ABSTRACT:
An apparatus for achieving in-phase mode operation of a diode laser. A photonic band gap mirror (photonic crystal) having a periodic lattice structure is placed in front of light emitted from one side of the laser diode array. Because of an incomplete photonic band gap in the photonic crystal, light normal to the crystal will be primarily reflected while light at an angle will be primarily transmitted through the mirror. Since in-phase emission is primarily normal and out-of-phase emission primarily off axis, the reflected light which is directed back into the laser cavity will be the predominant lasing mode. The out-of-phase mode primarily transmitted will have significantly larger losses. The resulting laser diode apparatus will therefore operate in-phase and produce a single lobe far-field distribution.
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Bovernick Rodney B.
Sanghavi Hemang
TRW Inc.
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