Mode splitter and magneto-optical signal detection device

Details Mode splitter and magneto-optical signal detection device Mode splitter and magneto-optical signal detection device

1991-04-11

1993-05-04

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

385 28, 385 14, 385 43, 385 36, 385 37, G11B 700

Patent

active

052088006

ABSTRACT:
A magneto-optical signal detection device comprising a thin film type optical waveguide unit having a substrate on which a waveguide is formed. The unit has a coupling portion for coupling two polarization components simultaneously in a same plane of the waveguide as a TE mode and a TM mode. The modes TE and TM are included in reflection light reflected from a magneto-optical recording medium and perpendicular to each other. The unit also has a TE-TM mode separating portion having a taper boundary. A waveguide layer is gradually thinned in the taper boundary toward an outer end thereof.

REFERENCES:
patent: 4832428 (1989-05-01), Miyawaki et al.
patent: 4861128 (1989-08-01), Ishikawa et al.
patent: 4932743 (1990-06-01), Isobe et al.
patent: 4971414 (1990-11-01), Funato et al.
patent: 4978187 (1990-12-01), Minemura et al.
patent: 4991160 (1991-02-01), Premji
Kobayashi et al., "An Optical Waveguide TE-TM Mode Splitter" Appl. Physics Letter vol. 32 No. 5, Mar. 1, 1978, pp. 300-302.

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