Coherent beam addition of GaAlAs lasers by binary phase gratings

Journal Article · Mon Apr 07 04:00:00 EST 1986 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.96648· OSTI ID:5953159

Leger, J R; Swanson, G J; Veldkamp, W B

A general technique for combining laser beams coherently using binary gratings has been developed. Experiments were performed with lasers from a monolithic linear GaAlAs array. The grating transmittance profile was designed to convert the light beams from the array into a single beam with high efficiency. Optical feedback through the grating locked the lasers together in proper relative phase. The far-field diffraction pattern of the sum was practically identical in shape to that of a single laser. Coupling efficiencies greater than 80% appear to be feasible with this technique. The method is applicable to a variety of laser systems (gas, solid state, etc.) and is readily extendable to a two-dimensional array of lasers.

• Research Organization: MIT Lincoln Laboratory, P. O. Box 73, Lexington, Massachusetts 02173
• OSTI ID: 5953159
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 48:14; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
COHERENT SCATTERING
COUPLING
DIFFRACTION
EFFICIENCY
ELECTROMAGNETIC RADIATION
FEEDBACK
FOCUSING
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GRATINGS
LASER RADIATION
LASERS
PNICTIDES
RADIATIONS
SCATTERING
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS