Title:
RESETTING METHOD FOR BISTABLE SEMICONDUCTOR LASER AND OPTICAL MEMORY USED FOR EXECUTING THE SAME
Document Type and Number:
Japanese Patent JPH03134635
Kind Code:
A
Abstract:
PURPOSE:To reset a laser by providing a bistable semiconductor laser, a current bias circuit, a photocoupler, a photoelectric conversion circuit and a delay circuit CONSTITUTION:A bistable semiconductor laser 1 can be turned to to stable states such as an ON state and an OFF state under a fixed current bias. A light pulse received by a photocoupler 3 is split and one pulse is inputted to the bistable laser 1. Then, the laser 1 is set to the ON state. The other pulse is formed to be a current pulse through an optical/electric converter 4, supplied through a delay circuit 5 to a current bias circuit 2 and overlapped to the current bias of the laser 1. Then, the laser 1 is reset. Thus, an optical memory can be obtained with a short response time at the time of setting, and it is very effective for the high-speed operation and high-speed performance of a system.
Inventors:
MUTSUKAWA HIROYUKI
Application Number:
JP27152389A
Publication Date:
June 07, 1991
Filing Date:
October 20, 1989
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G02F3/02; H01S5/042; (IPC1-7): G02F3/02; H01S3/096
Attorney, Agent or Firm:
Akira Matsumoto
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