Optical beam deflector

Details Optical beam deflector Optical beam deflector

1990-12-10

1992-10-20

LaRoche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave directional modulation

359318, 385 10, 385 14, 385129, G02B 2600, G02B 612, G02F 129, G02F 1295

Patent

active

051575434

ABSTRACT:
An apparatus for changing the direction of an optical beam comprises a thin film grating deflector; an optical energy source for providing optical energy to strike the deflector at a first angle with respect to gratings of the deflector and to exit the deflector at a second angle with respect to the gratings; and elements for applying a voltage to the deflector to vary the second angle. The optical energy source preferably comprises a laser diode; and a collimator for coupling energy from the laser diode to the grating deflector. The grating deflector is a planar waveguide including a plurality of stacked quantum wells formed of GaAs separated by barriers of AlGaAs. Optical energy provided to the grating deflector in a first direction is deflected in a second direction. These directions define a plane in which the waveguide is disposed. The quantum wells are stacked in a direction perpendicular to a plane of the waveguide. The optical energy source, the thin film grating deflector, the voltage applying elements and the collimator may be integrated into a single chip.

REFERENCES:
patent: 4639073 (1987-01-01), Yip et al.
patent: 4755015 (1988-07-01), Uno et al.
patent: 4973121 (1990-11-01), Brophy et al.
G. J. Sonek, et al., Modal Dispersion of GaAs/AlGaAs Multiple Quantum Well Waveguides, Feb. 1986, pp. 18-19, 1986 Integrated and Guided Wave Optics, Technical Digest, Paper WDD4.
X. Cheng, et al., Electrooptic Bragg-Diffraction Modulators in GaAs/AlGaAs Heterostructure Waveguides, Jun. 1988, pp. 809-817, Journal of Lightwave Technology, vol. 6, No. 6, Jun. 1988, New York US, Sections II, V; Figure 1.
S. Mukai et al. Numerical Analysis of a Twin-striped AlGaAs Doubleheterostructure Deflector, Extended Abstracts (48th Autumn Meeting, 1987): Japan Society of Applied Physics, No. 3, 19p-ZL-3, p. 639 (translation enclosed).
S. Mukai et al. Beam Waist Position Variable Diode Laser Integrated with Carrier Injection Type Lens, Extended Abstracts (35th Spring Meeting, 1988): Japan Society of Applied Physics and Related Societies, No. 3, 29a-ZP-7, p. 863 (translation enclosed).

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