Large-aperture light sources using resonant leaky-wave coupling

Details Large-aperture light sources using resonant leaky-wave coupling Large-aperture light sources using resonant leaky-wave coupling

1991-05-10

1992-03-31

Epps, Georgia

Coherent light generators

Particular active media

Semiconductor

372 23, 372 45, 372 97, 372103, H01S 319

Patent

active

051014130

ABSTRACT:
Device coherency and optical-mode stability are obtained in light sources having large apertures and output powers, by using an important property of arrays of antiguides or negative-index waveguides. One embodiment of the invention is a power amplifier into which a light beam is input from a master oscillator. The input beam is introduced into one or more waveguides of an array, and leaks into successive adjacent waveguides, forming a fan-out pattern as it progresses along the array. The antiguides have an interelement spacing that is selected to produce a resonance effect, as a result of which light is coherently coupled to all waveguides in the array. The structure also provides lateral mode control and assures mode stability of the output. In the amplifier embodiment of the invention, the end faces of the array are antireflective coated and light makes only a single pass through the structure. The other disclosed embodiment is an injection-locked oscillator, but the same principle of leaky waveguides is used to provide a high degree of device coherency and mode stability. In this version, the array has reflective end faces and functions as a slave laser.

REFERENCES:
patent: 4063189 (1977-12-01), Scifres et al.
patent: 4760580 (1988-07-01), Thompson et al.
patent: 4764935 (1988-08-01), Wilcox et al.
patent: 4852113 (1989-07-01), Botez
patent: 4860298 (1989-08-01), Botez et al.
patent: 4985897 (1991-01-01), Botez et al.

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