JPH0465312U - - Google Patents
Info
- Publication number
- JPH0465312U JPH0465312U JP10845290U JP10845290U JPH0465312U JP H0465312 U JPH0465312 U JP H0465312U JP 10845290 U JP10845290 U JP 10845290U JP 10845290 U JP10845290 U JP 10845290U JP H0465312 U JPH0465312 U JP H0465312U
- Authority
- JP
- Japan
- Prior art keywords
- optical isolator
- section
- faraday rotator
- isolator according
- light converging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 8
- 239000002223 garnet Substances 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Description
第１図ａ及びｂは本考案における光アイソレー
タの一構成例を示す図で、第１図ａは斜視図、第
１図ｂは側面図である。第２図は第１図ａ及びｂ
の光アイソレータの原理を示す図で、光アイソレ
ータ内を反射戻り光が透過する場合の挙動につい
て示すしてある。第３図ａ，ｂ及びｃは、従来の
偏光無依存型光アイソレータを示す図で、第３図
ａは構成例を示し、第３図ｂ及びｃは順逆各方向
の入射光の挙動について示している。第４図は第
３図ａ及びｂに示す光アイソレータの原理および
構造を示す図、第５図ａ及びｂは従来の偏光無依
存型光アイソレータの別の一例を示す図、第６図
は従来例に基づく複屈折結晶平板使用の偏光無依
存光アイソレータに、反射戻り光が逆方向に透過
する際の挙動について示す図である。
図中、１……フアラデー回転子、２，３，４，
５……複屈折結晶平板、６……第１のレンズ、７
……第２のレンズ、８ａ，９ａ……光フアイバー
コア、１１……結晶軸の光学素子面への写像の方
向、２１〜２６……矢印、５１……フアラデー回
転子、５２，５３……複屈折結晶くさび板、５４
，５５……光収束レンズ、６１……フアラデー回
転子、６２，６３，６４，６５……複屈折結晶平
板。
FIGS. 1a and 1b are diagrams showing an example of the configuration of an optical isolator according to the present invention, with FIG. 1a being a perspective view and FIG. 1b being a side view. Figure 2 is from Figure 1 a and b.
This is a diagram showing the principle of an optical isolator, and shows the behavior when reflected return light is transmitted through the optical isolator. Figures 3a, b, and c are diagrams showing conventional polarization-independent optical isolators, with Figure 3a showing a configuration example, and Figures 3b and c showing the behavior of incident light in each direction. ing. FIG. 4 is a diagram showing the principle and structure of the optical isolator shown in FIGS. 3a and 3b, FIGS. FIG. 7 is a diagram illustrating behavior when reflected return light is transmitted in the opposite direction to a polarization-independent optical isolator using a birefringent crystal flat plate based on an example. In the figure, 1... Faraday rotator, 2, 3, 4,
5... Birefringent crystal flat plate, 6... First lens, 7
...Second lens, 8a, 9a...Optical fiber core, 11...Direction of mapping of crystal axis onto optical element surface, 21-26...Arrow, 51...Faraday rotator, 52, 53... Birefringent crystal wedge plate, 54
, 55... Light converging lens, 61... Faraday rotator, 62, 63, 64, 65... Birefringent crystal flat plate.
Claims (1)
前記偏光部及び検光部間に介在するフアラデー回
転子とを配置した光アイソレータにおいて、前記
フアラデー回転子と前記偏光部との間、及び前記
フアラデー回転子と前記検光部との間に第１及び
第２の光収束手段を夫々配したことを特徴とする
光アイソレータ。 ２ 第１請求項記載の光アイソレータにおいて、
前記フアラデー回転子は磁性ガーネツト膜を有す
ることを特徴とする光アイソレータ。 ３ 第１又は第２請求項記載の光アイソレータに
おいて、前記偏光部及び検光部は、夫々一対の複
屈折結晶板からなることを特徴とする光アイソレ
ータ。 ４ 第１乃至第３請求項のうちのいずれか記載の
光アイソレータにおいて、前記一対の複屈折結晶
板のうちの少なくとも一つはルチル結晶板である
ことを特徴とする光アイソレータ。 ５ 第１乃至第４請求項のうちのいずれか記載の
光アイソレータにおいて、前記第１及び第２の光
収束手段のうち少なくとも一方は球レンズである
ことを特徴とする光アイソレータ。 ６ 第１請求項記載の光アイソレータにおいて、
前記第１及び第２の光収束手段の少なくとも一方
は屈折率分布型レンズであることを特徴とする光
アイソレータ。[Claims for Utility Model Registration] 1. An optical isolator in which a polarizing section and an analyzing section that perform birefringence and a Faraday rotator interposed between the polarizing section and the analyzing section are disposed on an optical path, wherein the Faraday rotator and the polarizing section, and between the Faraday rotator and the analyzing section, first and second light converging means are arranged, respectively. 2. In the optical isolator according to claim 1,
An optical isolator characterized in that the Faraday rotator has a magnetic garnet film. 3. The optical isolator according to claim 1 or 2, wherein the polarizing section and the analyzing section each include a pair of birefringent crystal plates. 4. The optical isolator according to any one of claims 1 to 3, wherein at least one of the pair of birefringent crystal plates is a rutile crystal plate. 5. The optical isolator according to any one of claims 1 to 4, wherein at least one of the first and second light converging means is a spherical lens. 6 In the optical isolator according to the first claim,
An optical isolator characterized in that at least one of the first and second light converging means is a gradient index lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10845290U JP2524881Y2 (en) | 1990-10-18 | 1990-10-18 | Optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10845290U JP2524881Y2 (en) | 1990-10-18 | 1990-10-18 | Optical isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0465312U true JPH0465312U (en) | 1992-06-05 |
| JP2524881Y2 JP2524881Y2 (en) | 1997-02-05 |
Family
ID=31855464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10845290U Expired - Lifetime JP2524881Y2 (en) | 1990-10-18 | 1990-10-18 | Optical isolator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2524881Y2 (en) |
-
1990
- 1990-10-18 JP JP10845290U patent/JP2524881Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2524881Y2 (en) | 1997-02-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |