Externally modulated laser source for array illumination

Details Externally modulated laser source for array illumination Externally modulated laser source for array illumination

1991-05-21

1993-03-16

Scott, Jr., Leon

Coherent light generators

Particular resonant cavity

Distributed feedback

372 26, 372102, H01S 308

Patent

active

051951037

ABSTRACT:
An arrangement for generating an array (one- or two-dimensional) of optical beams, or spots, is disclosed. The array is particularly useful in conjunction with an array of optically sensitive devices utilized in applications such as optical computing or photonic switching. The array generator includes an optical gain medium and a partially reflecting mirror disposed to form an externally modulated laser arrangement. A diffraction grating, such as a Dammann grating, is disposed in the signal path to form the required array of optical beams. A wavelength control element, including transparent and non-reflecting regions, may be disposed beyond the output of the diffraction grating to provide optical feedback for wavelength stabilization of the gain medium.

REFERENCES:
patent: 4656641 (1987-04-01), Scifres et al.
patent: 4978974 (1990-12-01), Etzel
patent: 5050179 (1991-09-01), Mooradian
"Coherent beam addition of GaAlAs lasers . . . ", J. R. Leger et al., Appl. Phys. Lett., vol. 48, No. 14, Apr. 1986, pp. 888-890.
"Coherent summation of laser beams . . . ", W. B. Veldkamp et al., Optics Lett., vol. 11, No. 5, May 1986, pp. 303-305.
"Coherent laser addition . . . ", J. R. Leger et al., Applied Optics, vol. 26, No. 20, Oct. 1987, pp. 4391-4399.

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