Coherent light generators – Particular resonant cavity – Folded cavity
Patent
1998-04-21
2000-10-17
Font, Frank G.
Coherent light generators
Particular resonant cavity
Folded cavity
372 43, 372 44, 372 45, 372 50, 372 92, 372 94, 372 98, H01S 3083, H01S 318, H01S 319, H01S 308
Patent
active
061342572
ABSTRACT:
A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive index (n>2 and typically n>3) is sufficiently deformed from circularity so as to support at least one librational mode (e.g., a V-shaped or a bow-tie mode, the latter being presently preferred for generating relatively high power, directional outputs). Specifically described is a Group III-V compound semiconductor, quantum cascade (QC), micro-cylinder laser in which the resonator has a flattened quadrupolar deformation from circularity. This laser exhibits both a highly directional output emission and a three-order of magnitude increase in optical output power compared to conventional semiconductor micro-cylinder QC lasers having circularly symmetric resonators.
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Capasso Federico
Cho Alfred Yi
Faist Jerome
Gmachl Claire F.
Narimanov Evgueni E.
Flores Ruiz Delma R.
Font Frank G.
Lucent Technologies - Inc.
Urbano Michael J.
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