JPH02104331U

JPH02104331U -

Info

Publication number: JPH02104331U
Application number: JP1265789U
Authority: JP
Priority date: 1989-02-07
Filing date: 1989-02-07
Publication date: 1990-08-20

Description

[Brief explanation of drawings]

第１図は本考案の１実施例を示し、直交偏波型
光周波数シフタの基本的構成図であり、第２図と
第３図は従来例の基本的構成図である。１４，１４′……定偏波光フアイバカプラ、１
５……音響光学素子。 FIG. 1 shows one embodiment of the present invention and is a basic configuration diagram of an orthogonal polarization type optical frequency shifter, and FIGS. 2 and 3 are basic configuration diagrams of a conventional example. 14, 14'...constant polarization optical fiber coupler, 1
5... Acousto-optic element.

Claims

[Scope of utility model registration request]

A first constant polarization optical fiber coupler that splits the linearly polarized light from the light source into two, and a second constant polarization optical fiber coupler that combines and outputs the two linearly polarized lights split by the first constant polarization optical fiber coupler. a constant polarization optical fiber coupler, the first constant polarization optical fiber coupler and the second constant polarization optical fiber coupler;
A polarization control element that adjusts the plane of polarization so that the planes of polarization of the two split linearly polarized lights are orthogonal to each other, and a polarization control element that adjusts the plane of polarization of the two split linearly polarized lights on the optical axis between the fixed polarization optical fiber coupler and 1. An orthogonal polarization type optical frequency shifter comprising: an optical frequency shifter that frequency modulates at least one side of the optical frequency shifter.