Optical data storage system with compact holographic polarizatio

Details Optical data storage system with compact holographic polarizatio Optical data storage system with compact holographic polarizatio

1991-11-22

1993-05-18

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 18, 359485, 369 4441, 369103, 369110, 2502015, 257 80, G02B 532

Patent

active

052125726

ABSTRACT:
An optical data storage system having a highly integrated optical storage head that (1) integrates the read, write and servo paths, (2) comprises a monolithic laser-detector storage array that is integrated on a single chip an, wherein laser-detector alignment desirably is fixed at the time of fabrication, and (3) comprises a four-hologram optical element that directs light to an optical disk and divides the returning light into one track error and two focus error servo beams and two polarization component beams for data detection, and also provides a satellite beam of the incident laser beam for monitoring power of the laser beam.

REFERENCES:
patent: 4736231 (1988-04-01), Ayabe et al.
patent: 4905216 (1990-02-01), Lee
patent: 5032879 (1991-07-01), Buchmann et al.
Kogelnik, "Coupled Wave Theory for Thick Hologram Grating" Bell Technical Journal, Nov. 1969, vol. 48, #9, pp. 2909-2945.

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