Optical pickup using a waveguide

Details Optical pickup using a waveguide Optical pickup using a waveguide

1988-02-03

1989-08-29

Sikes, William L.

Recorders

Record receiver deforming

350 9612, 350 9614, 350 9618, 350 9619, 346 33A, 369110, 369112, 369122, G02B 610, G01D 900, G11B 700

Patent

active

048611280

ABSTRACT:
An optical pickup comprising a semiconductor laser, a first waveguide for leading light emitted by the semiconductor laser to recording medium and coupling again light returning from the recording medium; splitting element for separating the light returning from the recording medium from the first waveguide path; and a second waveguide propagating light returning from the recording medium and separated by the splitting element; wherein light going towards the recording medium and light returning from the recording medium propagate separately in the first and the second waveguide so that the utilization efficiency of the light is increased.

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patent: 4720824 (1988-01-01), Hayashi
patent: 4752120 (1988-06-01), Shimizu
patent: 4760568 (1988-07-01), Hine
patent: 4779259 (1988-10-01), Kono et al.
patent: 4801184 (1989-01-01), Revelli
Buckman, "Polarization-selective lateral . . . " J. Opt Soc. Am. vol. 72, No. 6 6/82, pp. 688-691.
Masuda et al., "An optical waveguide TE-TM Mode splitter . . . " Conf 6th Eur. CONF. on Opt. Comm. 9/80 pp. 264-267.
Ura et al., "An Integrated-Optic Disk . . . " Dept. of Electronics, Osaka Univ. No. 0QE85-72 (no date) pp. 539-546.

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