JPH0455801A - Tip structure of optical fiber - Google Patents
Tip structure of optical fiberInfo
- Publication number
- JPH0455801A JPH0455801A JP2167019A JP16701990A JPH0455801A JP H0455801 A JPH0455801 A JP H0455801A JP 2167019 A JP2167019 A JP 2167019A JP 16701990 A JP16701990 A JP 16701990A JP H0455801 A JPH0455801 A JP H0455801A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- optical fiber
- fiber
- outer diameter
- outside diameter
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 45
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001312 dry etching Methods 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 6
- 238000007740 vapor deposition Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
- G02B6/29368—Light guide comprising the filter, e.g. filter deposited on a fibre end
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光ファイバの先端構造に関し、特に光フィルタ
あるいは光分波器等の光デバイスに使用する光ファイバ
の先端構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tip structure of an optical fiber, and more particularly to a tip structure of an optical fiber used in an optical device such as an optical filter or an optical demultiplexer.
〔従来の技術〕７
従来の光フィルタに使用する光ファイバの先端構造は、
第２図（ａ）に示すように、光ファイバ１０の端面に干
渉膜フィルタ２０を蒸着したもので、必ず先端部の側面
にも蒸着膜３０ｂが形成されている。これは、干渉膜フ
ィルタ２０の蒸着時、第２図（ｂ）に示すように、光フ
ァイバ１０を治具３０から若干突出した形にしておかな
ければ、光ファイバ１０を治具３０から外すときに干渉
膜フィルタ２０を破損する恐れがあるためである。[Prior art] 7. The tip structure of the optical fiber used in the conventional optical filter is as follows:
As shown in FIG. 2(a), an interference film filter 20 is deposited on the end face of the optical fiber 10, and a deposited film 30b is always formed on the side surface of the tip. This is because when the interference film filter 20 is deposited, the optical fiber 10 must be made to slightly protrude from the jig 30 as shown in FIG. 2(b), otherwise when the optical fiber 10 is removed from the jig 30 This is because the interference film filter 20 may be damaged.
従来の光フィルタは、このように形成された蒸着膜付き
の光ファイバ１０を、光ファイバ１０の外径よりわずか
に大きい、キャピラリに設けられた細径の穴の途中まで
挿入し、この細径の穴の反対側から別の光ファイバを挿
入し、整合材を介して突き合せ位置で固定保持して形成
されている。A conventional optical filter is manufactured by inserting the optical fiber 10 with the vapor-deposited film formed in this way halfway into a small diameter hole provided in a capillary, which is slightly larger than the outer diameter of the optical fiber 10, and Another optical fiber is inserted from the opposite side of the hole and held fixed at the butt position via an alignment material.
上述した従来の光ファイバの先端構造は、必ず先端部の
側面にも蒸着膜３０ｂが形成されているので、光ファイ
バの先端部分の外径が２〜３μｍ太くなり、キャピラリ
に設けられたｍ径の穴の内径が、光ファイバの外径より
１〜２μｍ大きい程度では挿入できない危険があるとい
う問題点があり、又、作業の手間を惜んで穴を十分に大
きくすると、蒸着後の光ファイバの先端部分の外径のば
らつきにより、キャピラリに設けられた細径の穴と光フ
ァイバとの隙間が大きくなり、光軸のずれが生じ易く、
調整工数が多くかかるともに光ファイバの接続損失が大
きくなることがあるという問題点がある。In the conventional optical fiber tip structure described above, the vapor deposited film 30b is always formed on the side surface of the tip, so the outer diameter of the tip of the optical fiber becomes thicker by 2 to 3 μm, and the m diameter provided in the capillary increases. There is a problem that if the inner diameter of the optical fiber hole is 1 to 2 μm larger than the outer diameter of the optical fiber, there is a risk that the optical fiber cannot be inserted. Due to variations in the outer diameter of the tip, the gap between the small diameter hole in the capillary and the optical fiber becomes large, which tends to cause misalignment of the optical axis.
There are problems in that it takes a lot of adjustment man-hours and the connection loss of the optical fiber may increase.
本発明の目的は、光ファイバの端面に干渉膜フィルタを
蒸着しても、光ファイバの先端部分の外径が太くならず
、常に同一の内径のキャピラリに挿入可能で作業が簡単
になり、しがも接続損失が大きくならない光ファイバの
先端構造を提供することにある。An object of the present invention is to simplify the work by not increasing the outer diameter of the tip of the optical fiber even if an interference film filter is deposited on the end face of the optical fiber, and allowing the fiber to be inserted into a capillary with the same inner diameter at all times. Another object of the present invention is to provide an optical fiber tip structure that does not increase connection loss.
本発明の光ファイバの先端構造は、光ファイバの先端に
成膜した光ファイバの先端構造において、前記光ファイ
バの先端部分の外径が他の部分の外径より細くなるよう
形成する構成である。The optical fiber tip structure of the present invention is such that the outer diameter of the tip portion of the optical fiber is smaller than the outer diameter of other portions in the optical fiber tip structure in which a film is formed at the tip of the optical fiber. .
本発明の光ファイバの先端構造は、前記光ファイバの先
端部分を弗酸とスパッタとドライエツチングとのいずれ
か一つあるいは組合せによりエツチングを行い前記先端
部分の外径を他の部分の外径より細くなるよう形成して
もよい。The tip structure of the optical fiber of the present invention is such that the tip portion of the optical fiber is etched by any one or a combination of hydrofluoric acid, sputtering, and dry etching, and the outer diameter of the tip portion is made smaller than the outer diameter of other portions. It may be formed to be thin.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の縦断面図である。FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
第１図（ａ）は光ファイバの縦断面図であり、光ファイ
バ１は、先端部外周１ａを予め弗酸でエツチングして、
５μｍ程度先端部分の外径を他の部分の外径より細くし
であることを示している。FIG. 1(a) is a longitudinal cross-sectional view of an optical fiber.
This indicates that the outer diameter of the tip portion is approximately 5 μm smaller than the outer diameter of the other portions.
第１図（ｂ）は干渉膜フィルタの蒸着時の状態を示す縦
断面図であり、光ファイバ１を治具３から若干突出した
形で保持後、干渉膜フィルタ２の蒸着を行った状態を示
している。光ファイバ１の先端部分の蒸着後の外径Ｂは
、他の部分の外径Ａより１〜２μｍ程度細くなっている
。FIG. 1(b) is a vertical cross-sectional view showing the state during vapor deposition of the interference film filter, and shows the state in which the optical fiber 1 is held in a shape slightly protruding from the jig 3, and then the interference film filter 2 is vapor-deposited. It shows. The outer diameter B of the tip portion of the optical fiber 1 after vapor deposition is approximately 1 to 2 μm smaller than the outer diameter A of the other portions.
第１図（ｃ）は干渉膜フィルタ２の蒸着を行った後の光
ファイバ１の先端部分の縦断面図であり、この先端部分
をキャピラリに設けられた細径の穴の途中まで挿入して
、光フィルタを構成する。このとき、キャピラリに設け
られた細径の穴の内径が、光ファイバ１の外径Ａより若
干大きければ挿入には支障がなく、かつ、外径が細くな
っている部分の長さは０．５ｍｍ程度であるので、キャ
ピラリ内での光軸のずれは問題ない。FIG. 1(c) is a longitudinal cross-sectional view of the tip of the optical fiber 1 after the interference film filter 2 has been deposited, and the tip is inserted halfway into the small diameter hole provided in the capillary. , constitutes an optical filter. At this time, if the inner diameter of the small diameter hole provided in the capillary is slightly larger than the outer diameter A of the optical fiber 1, there is no problem with insertion, and the length of the part where the outer diameter is narrow is 0. Since the distance is about 5 mm, there is no problem with the optical axis misalignment within the capillary.
なお、光ファイバ１の先端部外周１ａを予め弗酸でエツ
チングすると説明したが、このエツチングは、弗酸以外
にも、スパッタあるいはドライエツチングによって行う
ことができる。Although it has been described that the outer periphery 1a of the tip end of the optical fiber 1 is etched in advance with hydrofluoric acid, this etching can be performed by sputtering or dry etching in addition to hydrofluoric acid.
以上説明したように、本発明は、光ファイバの先端部分
の外径が他の部分の外径より細くなるよう形成すること
により、光ファイバの端面に干渉膜フィルタを蒸着して
も、光ファイバの先端部分の外径が太くならず、常に同
一の内径のキャピラリに挿入可能で作業が簡単になりし
かも接続損失が大きくならないという効果が有る。As explained above, the present invention allows the optical fiber to be formed so that the outer diameter of the tip part thereof is smaller than the outer diameter of other parts, so that even if an interference film filter is deposited on the end face of the optical fiber, the optical fiber The outer diameter of the tip of the capillary does not become thick, and the capillary can always be inserted into a capillary with the same inner diameter, which simplifies work and prevents connection loss from becoming large.
第１図は本発明の一実施例の縦断面図、第２図は従来の
光フィルタに使用する光ファイバの先端構造の縦断面図
である。
１・・・・・・光ファイバ １ａ・・・・・・先端部外
周、２・・・・・・干渉膜フィルタ、３・・・・・・治
具。
代理人 弁理士 内 原 晋FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the tip structure of an optical fiber used in a conventional optical filter. 1... Optical fiber 1a... Outer periphery of tip, 2... Interference film filter, 3... Jig. Agent Patent Attorney Susumu Uchihara
Claims (1)
において、前記光ファイバの先端部分の外径が他の部分
の外径より細くなるよう形成することを特徴とする光フ
ァイバの先端構造。 ２、前記光ファイバの先端部分を弗酸とスパッタとドラ
イエッチングとのいずれか一つあるいは組合せによりエ
ッチングを行い前記先端部分の外径を他の部分の外径よ
り細くなるよう形成したことを特徴とする請求項１記載
の光ファイバの先端構造。[Claims] 1. In the tip structure of an optical fiber formed with a film formed on the tip of the optical fiber, the outer diameter of the tip portion of the optical fiber is formed to be smaller than the outer diameter of other portions. Optical fiber tip structure. 2. The tip portion of the optical fiber is etched by any one or a combination of hydrofluoric acid, sputtering, and dry etching, so that the outer diameter of the tip portion is smaller than the outer diameter of other portions. The tip structure of an optical fiber according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167019A JP2826368B2 (en) | 1990-06-26 | 1990-06-26 | Optical fiber tip structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167019A JP2826368B2 (en) | 1990-06-26 | 1990-06-26 | Optical fiber tip structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455801A true JPH0455801A (en) | 1992-02-24 |
| JP2826368B2 JP2826368B2 (en) | 1998-11-18 |
Family
ID=15841885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2167019A Expired - Fee Related JP2826368B2 (en) | 1990-06-26 | 1990-06-26 | Optical fiber tip structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2826368B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997037259A1 (en) * | 1996-03-29 | 1997-10-09 | The Whitaker Corporation | Pigtail interferometer |
| US7405706B2 (en) | 2004-06-25 | 2008-07-29 | Alps Electric Co., Ltd | In-vehicle antenna apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51144633A (en) * | 1975-06-06 | 1976-12-11 | Toshiba Corp | Light fiber device |
| JPS62203103A (en) * | 1986-03-03 | 1987-09-07 | Japan Aviation Electronics Ind Ltd | Optical fiber |
| JPS638601A (en) * | 1986-06-27 | 1988-01-14 | Matsushita Electric Ind Co Ltd | Optical fiber with anti-reflection coating |
-
1990
- 1990-06-26 JP JP2167019A patent/JP2826368B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51144633A (en) * | 1975-06-06 | 1976-12-11 | Toshiba Corp | Light fiber device |
| JPS62203103A (en) * | 1986-03-03 | 1987-09-07 | Japan Aviation Electronics Ind Ltd | Optical fiber |
| JPS638601A (en) * | 1986-06-27 | 1988-01-14 | Matsushita Electric Ind Co Ltd | Optical fiber with anti-reflection coating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997037259A1 (en) * | 1996-03-29 | 1997-10-09 | The Whitaker Corporation | Pigtail interferometer |
| US5863449A (en) * | 1996-03-29 | 1999-01-26 | The Whitaker Corporation | Method for forming optical interferometer |
| US7405706B2 (en) | 2004-06-25 | 2008-07-29 | Alps Electric Co., Ltd | In-vehicle antenna apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2826368B2 (en) | 1998-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |