Laser optical system having a phase correction for controlling i

Details Laser optical system having a phase correction for controlling i Laser optical system having a phase correction for controlling i

1989-05-30

1990-11-20

Arnold, Bruce Y.

350163, G02B 2610, G02B 2700

Patent

active

049714120

ABSTRACT:
A laser optical system for obtaining a Gaussian distribution by correcting a phase laser beam oscillating in multi-transverse mode oscillated from a phase synchronous semiconductor laser or a broad contact semiconductor laser. The phase is corrected by multiple concavo-convexities of a phase correction plate arranged parallel to the direction of generating the transverse mode. The phase correction plate is positioned downstream from a collimator which turns the laser beam into parallel light, that is, the phase correction plate is disposed through the collimated beam, i.c., in an area where the beam is magnified and is of optically equal value regardless of position. Therefore, adjustment of the position of the phase correction plate is easy and formation of the concavo-convexity pattern of the phase correction plate is easy.

REFERENCES:
patent: 4699465 (1987-10-01), Rice et al.
patent: 4764929 (1988-08-01), Thaniyavarn
Optical Engineering, May/June 1980, vol. 19, No. 3, pp. 297-305, by J. R. Fienup, Iterative Method Applied to Image Reconstruction and To Computer-Generated Holographs.
Appl. Phys. Lett 41(12), 15 Dec. 1982, pp. 27-29, "Focusing of a 7700-A High Power Phased Array Semiconductor Laser", D. R. Scifres et al. IEEE Journal of Quantum Electronics, vol. QE-22, No. 6, Jun. 1986, Use of a Phase Corrector Plate to Generate a Single-Lobed Phased Array for Field Pattern, J. R. Heidel et al.
Appl. Phys. Lett. 50(13), 30 Mar. 1987, pp. 783-795, "Stable Quasi0.degree. Phase Mode Operation in a Laser Array Diode Nearly Aligned with a Phase Shifter", M. Taneya et al.

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