Coherent light generators – Particular beam control device – Modulation
Reexamination Certificate
2006-10-17
2006-10-17
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular beam control device
Modulation
C372S025000, C372S106000, C372S029016, C372S029020, C372S029023, C372S033000, C372S066000, C359S337000
Reexamination Certificate
active
07123634
ABSTRACT:
A solid state zig-zag slab laser amplifier in which depolarization occurring at total internal reflection from opposed lateral faces of the amplifier slab is controlled by selecting a complex evanescent coating that provides a selected phase retardance that results in minimization of depolarization. Without use of the complex coating, small changes in incidence angles can result in phase retardance changes large enough to increase depolarization significantly, especially when the amplifier is operated at higher powers. Appropriate selection of the complex evanescent coating allows a desired phase retardance angle to be maintained relatively constant over a small range of angles of incidence, at a given wavelength, and therefore permits minimization of depolarization and birefringence effects.
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Epp Paul T.
Goodno Gregory D.
Long, Jr. William H.
Rothenberg Joshua E.
Harvey Minsun Oh
Northrop Grumman Corporation
Sayadian Hrayr A.
Tarolli, Sundheim Covell & Tummino LLP
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