Title:
OPTICAL COUPLING DEVICE BETWEEN OPTICAL ELEMENTS
Document Type and Number:
Japanese Patent JPH05100259
Kind Code:
A
Abstract:
PURPOSE:To couple light from an optical transmission line with a photodetector and light from the photodetector with the optical transmission line with high efficiency. CONSTITUTION:This coupling device is provided with a phase conjugate mirror 1 formed on photorefractive crystal, etc., a waveguide type photodetector 8 which is provided at an equal optical distance from it, and a semiconductor laser 7 which emits light having the save wavelength as signal light. Polarization beam splitters 5 and 5' make semiconductor laser light and signal light from a polarization maintaining fiber 4 incident on the photorefractive crystal 1 in almost opposite directions. Nonreciprocal type and reciprocal type Faraday elements 2 and 3, and 2' and 3' are provided so as to separate the signal light and laser light.
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Inventors:
FUJII KAZUTO
Application Number:
JP29075291A
Publication Date:
April 23, 1993
Filing Date:
October 09, 1991
Export Citation:
Assignee:
CANON KK
International Classes:
G02B6/42; G02F1/35; H01S5/00; (IPC1-7): G02B6/42; G02F1/35; H01S3/18
Attorney, Agent or Firm:
Kato Kazuo