INTER-OPTICAL ELEMENT OPTICAL COUPLER

Title:

INTER-OPTICAL ELEMENT OPTICAL COUPLER

Document Type and Number:

Japanese Patent JPH05119360

Kind Code:

A

Abstract:

PURPOSE:To provide an inter-optical element optical coupler where signal light is coupled with an optical detecting equipment, an optical fiber, etc., with high efficiency and signal light is amplified without increasing noise. CONSTITUTION:Pump light 6 (TE mode) from the polarization maintaining fiber 7 is converted into the TM mode via a beam splitter 8 so as to be made incident to photo refractive crystal 1 by the pair of reciprocity and non- reciprocity Faraday elements. The signal light 2 of the TM mode is made incident to crystal 1 from a reverse side. As a result, the phase coupling wave 4 (TM mode) of pump light 6 is generated and the phase conjugate wave 4 allows the diffusion of the beam splitter 8 and coupled with the other polarization maintaining fiber 5 by TM mode. The phase conjugate wave 4 succeeds to information from signal light 2 so as to be transmitted to the polarization maintaining fiber 5 as signal light.

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Inventors:

FUJII KAZUTO

Application Number:

JP29075191A

Publication Date:

May 18, 1993

Filing Date:

October 09, 1991

Export Citation:

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Assignee:

CANON KK

International Classes:

G02F1/35; G02B27/28; H01S5/00; (IPC1-7): G02F1/35; H01S3/18

Attorney, Agent or Firm:

Kato Kazuo

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