JPH0843669A - Optical fiber type coupler and its production - Google Patents

Optical fiber type coupler and its production

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Publication number
JPH0843669A
JPH0843669A JP18139494A JP18139494A JPH0843669A JP H0843669 A JPH0843669 A JP H0843669A JP 18139494 A JP18139494 A JP 18139494A JP 18139494 A JP18139494 A JP 18139494A JP H0843669 A JPH0843669 A JP H0843669A
Authority
JP
Japan
Prior art keywords
optical
optical fiber
wavelength
band
type coupler
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.)
Pending
Application number
JP18139494A
Other languages
Japanese (ja)
Inventor
Koichi Furukawa
幸一 古川
Masanobu Shimizu
正信 清水
Akio Hasemi
明男 長谷見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP18139494A priority Critical patent/JPH0843669A/en
Publication of JPH0843669A publication Critical patent/JPH0843669A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To miniaturize an optical transmission and reception module and to obtain an optical fiber type coupler by forming an optical branching and coupling part so as to have wavelength selectability with emission optical fibers fo three directions. CONSTITUTION:This optical fiber type coupler 1 in which the optical branching and coupling part 3 to which three pieces of the optical fibers 2 stretched by fusing under heating to branch light in three directions are attached, is formed. The optical branching and coupling part 3 described above has the wavelength selectability with the emission optical fibers of three directions. One central piece amoung the emission optical fibers of the three directions allows selective transmission of a wavelength of a lambda1 band and the other two pieces on both sides allow selective transmission of the wavelength of a lambda2 band so as not to allow transmission of the wavelength of the other bands. Namely, the optical fiber type coupler 1 is formed to have a coupling length at which one light signal of the wavelength of the band lambda1 is outputted from an exit port B2 and the light signal of the wavelength of the band lambda2 attains zero when the light signals of the wavelength of the lambda1, lambda2 of the incident light are made incident from the incident port A1. In such a case, the coupler has the coupling length at which the one light signal of the wavelength of the band lambda2 is outputted from the exit ports B1, B2 and the light signal of the wavelength of the band lambda1 becomes zero.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、３本の光ファイバを融
着、延伸して形成される光ファイバ型のカプラに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber type coupler formed by fusing and extending three optical fibers.

【０００２】[0002]

【従来の技術】昨今、光伝送路網の敷設が盛んになって
きている。その光伝送路網の一つに２波長多重伝送路網
がある。この２波長多重伝送路網は一本の光ファイバ伝
送路にλ1 、λ2 の２つの波長を同時に伝送するもので
ある。2. Description of the Related Art Recently, the laying of optical transmission line networks has become popular. One of the optical transmission line networks is a two-wavelength multiplex transmission line network. This two-wavelength multiplex transmission line network simultaneously transmits two wavelengths λ 1 and λ 2 to one optical fiber transmission line.

【０００３】従って、２波長多重伝送路網の受信側、例
えば、ユーザー側の光伝送路端末にはＯＮＵ（OPTICAL
NETWORK UNIT) と呼ばれる、ユーザー端末装置と結び付
けられる装置が設置され、このＯＮＵ等の端末では、２
つの波長を分離する部品、例えば２波長多重光送受信モ
ジュールが必要となる。Therefore, ONU (OPTICAL) is provided on the receiving side of the two-wavelength multiplex transmission line network, for example, on the optical transmission line terminal on the user side.
A device called NETWORK UNIT) that is connected to the user terminal device is installed.
A component for separating two wavelengths, for example, a two-wavelength multiplex optical transceiver module is required.

【０００４】[0004]

【発明が解決しようとする課題】図４に従来の光送受信
モジュールの一例を示す。入射光は、ＷＤＭ１１（Wave
length division multiplexer ）と呼ばれる波長選択性
を持った光分波器により1.30μｍ帯域の波長、及び1.55
μｍ帯域の波長の光信号に分けられる。1.55μｍ帯域の
波長の光信号は、例えば主に映像信号の伝送に使われ、
1.31μｍ帯域の波長の光信号は通信用に使われる。1.31
μｍ帯域の波長の光信号は３ｄＢカプラ１２によって図
示していない受信、送信装置に接続される。FIG. 4 shows an example of a conventional optical transceiver module. The incident light is WDM11 (Wave
A wavelength of 1.30 μm band and 1.55 by an optical demultiplexer with wavelength selectivity called a length division multiplexer).
It is divided into optical signals with wavelengths in the μm band. Optical signals with a wavelength of 1.55 μm band are mainly used for transmitting video signals,
Optical signals with a wavelength of 1.31 μm band are used for communication. 1.31
An optical signal having a wavelength in the μm band is connected by a 3 dB coupler 12 to a receiving / transmitting device (not shown).

【０００５】上記光送受信モジュール内にはＷＤＭ１
１、３ｄＢカプラ１２、それらの融着接続部１３および
余長部１４が配されることになる。この光送受信モジュ
ールはＦＴＴＨ（Fiber To The Home ）が実現されれば
各家庭に配置されるので小型化が要求されている。しか
るに、ＷＤＭ１１、３ｄＢカプラ１２、それらの融着接
続部１３及び、余長部１４を必ず含む上記光送受信モジ
ュールの小型化は制約を受けているのが現状である。A WDM1 is installed in the optical transceiver module.
The 1, 3 dB coupler 12, their fusion splicing portion 13, and the extra length portion 14 are arranged. This optical transmission / reception module is placed in each home if FTTH (Fiber To The Home) is realized, so that miniaturization is required. However, under the present circumstances, the miniaturization of the optical transmission / reception module, which necessarily includes the WDM 11, the 3 dB coupler 12, the fusion spliced portion 13 thereof, and the extra length portion 14, is restricted.

【０００６】本発明は上記の課題を解決し、光送受信モ
ジュールの小型化を可能とした光ファイバ型カプラを提
供することを目的とするものである。It is an object of the present invention to solve the above problems and provide an optical fiber type coupler which enables downsizing of an optical transceiver module.

【０００７】[0007]

【課題を解決するための手段】本発明は上記の課題を解
決するために以下のような手段を有している。The present invention has the following means in order to solve the above problems.

【０００８】本発明のうち請求項１の光ファイバ型カプ
ラは、３本の光ファイバが添接され加熱融着して延伸さ
れて３方向に分岐する光分岐結合部が形成された光ファ
イバ型カプラであって、前記光分岐結合部が３方向の出
射光ファイバに対して波長選択性を有していることを特
徴とする。The optical fiber type coupler according to claim 1 of the present invention is an optical fiber type coupler in which three optical fibers are spliced, heat fused and stretched to form an optical branching / coupling portion branching in three directions. The coupler is characterized in that the optical branching / coupling portion has wavelength selectivity with respect to outgoing optical fibers in three directions.

【０００９】本発明のうち請求項２の光ファイバ型カプ
ラは、光分岐結合部が並列に添接していることを特徴と
する。An optical fiber type coupler according to a second aspect of the present invention is characterized in that the optical branching and coupling portions are spliced in parallel.

【００１０】本発明のうち請求項３の光ファイバ型カプ
ラは、３方向の出射光ファイバの内１本はλ1 帯域の波
長を他の２本はλ2 帯域の波長を選択的に透過し他の帯
域の波長を透過しないことを特徴とする。In the optical fiber type coupler according to claim 3 of the present invention, one of the output optical fibers in the three directions selectively transmits the wavelength in the λ 1 band and the other two selectively transmit the wavelength in the λ 2 band. It is characterized in that it does not transmit wavelengths in other bands.

【００１１】本発明のうち請求項４の光ファイバ型カプ
ラは、３方向の出射光ファイバの内中央の１本はλ1 帯
域の波長を他の両側の２本はλ2 帯域の波長を選択的に
透過し他の帯域の波長を透過しないことを特徴とする。In the optical fiber type coupler according to claim 4 of the present invention, one of the output optical fibers in the three directions selects the wavelength in the λ 1 band and the other two on both sides select the wavelength in the λ 2 band. It is characterized in that it does not transmit wavelengths in other bands.

【００１２】本発明のうち請求項５の光ファイバ型カプ
ラは、λ1 帯域の波長が1.55μｍで、λ2 帯域の波長が
1.31μｍであることを特徴とする。The optical fiber type coupler according to claim 5 of the present invention has a wavelength in the λ 1 band of 1.55 μm and a wavelength in the λ 2 band of
It is characterized by being 1.31 μm.

【００１３】本発明のうち請求項６の光ファイバ型カプ
ラの製造方法は、３本の光ファイバが添接され加熱融着
して延伸し３方向に分岐する光分岐結合部を形成する光
ファイバ型カプラの製造方法において、前記加熱融着し
て延伸する際に少なくとも１本の光ファイバの延伸長を
他の光ファイバの延伸長と変えることによって光分岐結
合部の３方向の出射光ファイバに波長選択性を与えるこ
とを特徴とする。According to a sixth aspect of the present invention, in the method of manufacturing an optical fiber type coupler, an optical fiber is provided in which three optical fibers are spliced together, heat-fused, stretched, and form an optical branching / coupling portion branched in three directions. In the method for producing a mold coupler, the extension length of at least one optical fiber is changed to the extension length of another optical fiber when the heat fusion is performed and the extension is performed so that the optical branch coupling portion has three outgoing optical fibers. It is characterized by giving wavelength selectivity.

【００１４】本発明のうち請求項７の光ファイバ型カプ
ラの製造方法は、光分岐結合部を並列に添接して加熱融
着して延伸することを特徴とする。The method of manufacturing an optical fiber type coupler according to a seventh aspect of the present invention is characterized in that the optical branch-coupling portions are spliced in parallel, heat-fused and stretched.

【００１５】本発明のうち請求項８の光ファイバ型カプ
ラの製造方法は、延伸長を変える光ファイバが中央の光
ファイバであることを特徴とする。The method of manufacturing an optical fiber type coupler according to claim 8 of the present invention is characterized in that the optical fiber whose extension length is changed is the central optical fiber.

【００１６】[0016]

【作用】本発明のうち請求項１ないし請求項５の光ファ
イバ型カプラによれば、３本の光ファイバが添接され加
熱融着して延伸されて３方向に分岐する光分岐結合部が
形成され、前記光分岐結合部が３方向の出射光ファイバ
に対して波長選択性を有している光ファイバ型カプラと
なっているので、従来の光送受信モジュールが必要とし
たＷＤＭ、３ｄＢカプラ、それらの融着接続部及び余長
部を有していることになり部品点数がその分減るので光
送受信モジュールの小型化が可能となる。According to the optical fiber type coupler of the present invention, three optical fibers are spliced, heat-fused, stretched and branched in three directions. Since the formed optical branching and coupling section is an optical fiber type coupler having wavelength selectivity with respect to output optical fibers in three directions, the WDM, 3 dB coupler required by the conventional optical transceiver module, Since the fusion splicing portion and the extra length portion are provided, the number of parts is reduced accordingly, and the optical transceiver module can be miniaturized.

【００１７】本発明のうち請求項６の光ファイバ型カプ
ラの製造方法によれば、３本の光ファイバが添接され加
熱融着して延伸し３方向に分岐する光分岐結合部を形成
する光ファイバ型カプラの製造方法において、前記加熱
融着して延伸する際に少なくとも１本の光ファイバの延
伸長を他の光ファイバの延伸長と変えることによって光
分岐結合部の３方向の出射光ファイバに波長選択性を与
えることが可能となるので、本製造方法で製造された光
ファイバ型カプラは従来の光送受信モジュールが必要と
したＷＤＭ、３ｄＢカプラ、それらの融着接続部及び余
長部を有していることになり部品点数がその分減るので
光送受信モジュールの小型化が可能となる。According to the method of manufacturing an optical fiber type coupler of claim 6 of the present invention, three optical fibers are spliced together, heat-fused and extended to form an optical branching coupling portion branched in three directions. In the method of manufacturing an optical fiber type coupler, when the heat fusion is performed and the extension is performed, the extension length of at least one optical fiber is changed from the extension length of another optical fiber to emit light in three directions of the optical branching and coupling section. Since it becomes possible to impart wavelength selectivity to the fiber, the optical fiber type coupler manufactured by this manufacturing method is the WDM, 3 dB coupler required for the conventional optical transceiver module, their fusion splicing part and extra length part. Since the number of components is reduced by that much, the optical transceiver module can be miniaturized.

【００１８】[0018]

【実施例】【Example】

（実施例１）以下に本発明を実施例により詳細に説明す
る。図１において、１は本発明の一実施例を示す光ファ
イバ型カプラである。光ファイバ型カプラ１は３本の裸
光ファイバ２が並列に添接されて加熱融着して延伸さ
れ、３方向に分岐する光分岐結合部３が形成されてい
る。図２は光分岐結合部３の断面図である。図２におい
て４は各裸光ファイバ２のコアである。光分岐結合部３
は加熱融着して延伸する際に少なくとも１本例えば中央
の裸光ファイバ２の延伸長が他の両側の裸光ファイバ
２、２の延伸長に比べて長くなるように延伸して形成さ
れている。(Example 1) The present invention will be described in detail below with reference to examples. In FIG. 1, reference numeral 1 is an optical fiber type coupler showing an embodiment of the present invention. In the optical fiber type coupler 1, three bare optical fibers 2 are spliced in parallel, heated, fused and stretched to form an optical branching / coupling portion 3 branching in three directions. FIG. 2 is a sectional view of the optical branching / coupling unit 3. In FIG. 2, 4 is a core of each naked optical fiber 2. Optical branching / coupling unit 3
Is formed by stretching so that at least one of the central bare optical fibers 2 is stretched longer than the stretched lengths of the other bare optical fibers 2 and 2 on both sides when heat-fused and stretched. There is.

【００１９】この光ファイバ型カプラ１は入射光λ1 、
λ2 の帯域の波長の光信号が入射ポートＡ1 から入射さ
れた場合、図３のＡの位置に示すように出射ポートＢ2
からはλ1 の帯域の波長の光信号が１出力され、λ2 の
帯域の波長の光信号は０となる結合長となっている。こ
の場合、出射ポートＢ1 、Ｂ3 からはλ2 の帯域の波長
の光信号が１出力されλ1 の帯域の波長の光信号は０と
なる結合長となっている。This optical fiber type coupler 1 has an incident light λ 1 ,
When an optical signal having a wavelength of lambda 2 band is incident from the input port A 1, exit as shown in position A of FIG. 3 Port B 2
1 outputs an optical signal having a wavelength in the λ 1 band, and the optical signal having a wavelength in the λ 2 band has a coupling length of 0. In this case, the output ports B 1 and B 3 have a coupling length such that one optical signal having a wavelength of λ 2 is output and the optical signal having a wavelength of λ 1 is 0.

【００２０】上記の光ファイバ型カプラ１は以下のよう
にして製造される。裸光ファイバ２を３本並列に揃えて
添接した状態でガスバーナで加熱しつつ、先ず中央の裸
光ファイバ２を両側の裸光ファイバ２、２に先立って若
干延伸する。その後３本の裸光ファイバ２を融着して一
体にし、一体になった３本の裸光ファイバ２を延伸し
て、３方向に分岐する光分岐結合部３を形成する。一体
になった３本の裸光ファイバ２を延伸する際に、入射ポ
ート側例えば入射ポートＡ1 から入射光λ1 として波長
帯域が1.55μｍ、入射光λ2 として波長帯域が1.31μｍ
の２つの光信号を入射する。The optical fiber type coupler 1 described above is manufactured as follows. While the three bare optical fibers 2 are aligned in parallel and attached to each other and heated by the gas burner, the central bare optical fiber 2 is first stretched slightly before the bare optical fibers 2 and 2 on both sides. After that, the three bare optical fibers 2 are fused and integrated, and the three integrated bare optical fibers 2 are stretched to form an optical branching / coupling portion 3 that branches in three directions. When the three integrated bare optical fibers 2 are drawn, the wavelength band is 1.55 μm as the incident light λ 1 and 1.31 μm as the incident light λ 2 from the incident port side, for example, the incident port A 1.
Two optical signals of

【００２１】上記の入射光λ1 、λ2 を出射ポート側の
各ポートでモニタしつつ一体になった３本の裸光ファイ
バ２を延伸して図３に示す出射ポートＢ2 からはλ1 の
帯域の波長の光信号が１出力されλ2 の帯域の波長の光
信号は０となる結合長となり、かつ出射ポートＢ1 、Ｂ
3 からはλ2 の帯域の波長の光信号が１出力されλ1の
帯域の波長の光信号は０となる結合長となった時点で延
伸を停止する。以上のように行うことにより本実施例の
光ファイバ型カプラ１は製造される。While monitoring the above-mentioned incident lights λ 1 and λ 2 at the respective ports on the output port side, three integrated bare optical fibers 2 are extended and λ 1 is output from the output port B 2 shown in FIG. The optical signal having the wavelength in the band of 1 is output, and the optical signal having the wavelength in the band of λ 2 has a coupling length of 0, and the output ports B 1 , B
From 3, the optical signal having the wavelength of the λ 2 band is output as one, and the optical signal having the wavelength of the λ 1 band becomes 0, and the extension is stopped when the coupling length becomes zero. The optical fiber coupler 1 of the present embodiment is manufactured by performing the above process.

【００２２】[0022]

【発明の効果】以上述べたように、本発明のうち請求項
１ないし請求項５の光ファイバ型カプラによれば、３本
の光ファイバが添接され加熱融着して延伸されて３方向
に分岐する光分岐結合部が形成され、前記光分岐結合部
が３方向の出射光ファイバに対して波長選択性を有して
いる光ファイバ型カプラとなっているので、従来の光送
受信モジュールが必要としたＷＤＭ、３ｄＢカプラ、そ
れらの融着接続部及び余長部を有していることになり部
品点数がその分減るので光送受信モジュールの小型化が
可能となる。As described above, according to the optical fiber type coupler of claims 1 to 5 of the present invention, three optical fibers are spliced, heat fused and stretched to form three directions. Since an optical branching / coupling portion that branches into the optical fiber is formed, and the optical branching / coupling portion is an optical fiber type coupler having wavelength selectivity with respect to the outgoing optical fibers in three directions, the conventional optical transceiver module is The optical transmitter / receiver module can be miniaturized because the required WDM, 3 dB coupler, the fusion spliced portion thereof and the extra length portion are provided and the number of parts is reduced accordingly.

【００２３】本発明のうち請求項６ないし請求項８の光
ファイバ型カプラの製造方法によれば、３本の光ファイ
バが添接され加熱融着して延伸し３方向に分岐する光分
岐結合部を形成する光ファイバ型カプラの製造方法にお
いて、前記加熱融着して延伸する際に少なくとも１本の
光ファイバの延伸長を他の光ファイバの延伸長と変える
ことによって光分岐結合部の３方向の出射光ファイバに
波長選択性を与えることが可能となるので、本製造方法
で製造された光ファイバ型カプラは従来の光送受信モジ
ュールが必要としたＷＤＭ、３ｄＢカプラ、それらの融
着接続部及び余長部を有していることになり部品点数が
その分減るので光送受信モジュールの小型化が可能とな
る。According to the method for manufacturing an optical fiber type coupler of the present invention, the optical branching coupling in which three optical fibers are spliced, heat fused, stretched and branched in three directions. In the method of manufacturing an optical fiber type coupler for forming a section, the extension length of at least one optical fiber is changed from the extension length of another optical fiber when the heat fusion is performed to extend the optical branching coupler. Since it is possible to give wavelength selectivity to the outgoing optical fiber in the direction, the optical fiber type coupler manufactured by the present manufacturing method is the WDM, 3 dB coupler and their fusion splicing part required for the conventional optical transceiver module. Also, since the extra length portion is provided and the number of parts is reduced accordingly, the optical transceiver module can be downsized.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の光ファイバ型カプラの一実施例を示す
正面図である。FIG. 1 is a front view showing an embodiment of an optical fiber type coupler of the present invention.

【図２】図１の光ファイバ型カプラのＡ−Ａ線断面図で
ある。FIG. 2 is a cross-sectional view taken along the line AA of the optical fiber type coupler of FIG.

【図３】図１の光ファイバ型カプラの出射ポートと出射
量と結合長の関係図である。FIG. 3 is a relationship diagram of an emission port, an emission amount, and a coupling length of the optical fiber type coupler of FIG.

【図４】従来の光ファイバ型カプラを用いた光送受信モ
ジュールの一例を示す関係図である。FIG. 4 is a relationship diagram showing an example of an optical transceiver module using a conventional optical fiber type coupler.

【符号の説明】[Explanation of symbols]

１ 光ファイバ型カプラ ２ 裸光ファイバ ３ 光分岐結合部 ４ コア Ａ1 入射ポート Ｂ1 、Ｂ2 、Ｂ3 出射ポート1 Optical fiber type coupler 2 Naked optical fiber 3 Optical branching / coupling section 4 Core A 1 Incident port B 1 , B 2 , B 3 Emission port

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 ３本の光ファイバが添接され加熱融着し
て延伸されて３方向に分岐する光分岐結合部が形成され
た光ファイバ型カプラであって、前記光分岐結合部が３
方向の出射光ファイバに対して波長選択性を有している
ことを特徴とする光ファイバ型カプラ。1. An optical fiber type coupler in which three optical fibers are attached to each other, heat-fused, stretched, and formed with an optical branching / coupling portion branching in three directions, wherein the optical branching / coupling portion is three.
An optical fiber type coupler having a wavelength selectivity with respect to a directional outgoing optical fiber. 【請求項２】 光分岐結合部が並列に添接していること
を特徴とする請求項１記載の光ファイバ型カプラ。2. The optical fiber type coupler according to claim 1, wherein the optical branching / coupling portions are attached in parallel. 【請求項３】 ３方向の出射光ファイバの内１本はλ1
帯域の波長を他の２本はλ2 帯域の波長を選択的に透過
し他の帯域の波長を透過しないことを特徴とする請求項
１または請求項２記載の光ファイバ型カプラ。3. One of the three exit optical fibers is λ 1
3. The optical fiber coupler according to claim 1, wherein the other two wavelengths in the band selectively transmit the wavelengths in the λ 2 band and do not transmit the wavelengths in the other bands. 【請求項４】 ３方向の出射光ファイバの内中央の１本
はλ1 帯域の波長を他の両側の２本はλ2 帯域の波長を
選択的に透過し他の帯域の波長を透過しないことを特徴
とする請求項１ないし請求項３記載の光ファイバ型カプ
ラ。4. One of the three output optical fibers in the center of the optical fiber selectively transmits the wavelength of the λ 1 band, and the other two fibers on both sides selectively transmit the wavelength of the λ 2 band and do not transmit the wavelengths of the other bands. 4. The optical fiber type coupler according to claim 1, wherein: 【請求項５】 λ1 帯域の波長が1.55μｍで、λ2 帯域
の波長が1.31μｍであることを特徴とする請求項１ない
し請求項４記載の光ファイバ型カプラ。5. The optical fiber type coupler according to claim 1, wherein the wavelength in the λ 1 band is 1.55 μm and the wavelength in the λ 2 band is 1.31 μm. 【請求項６】 ３本の光ファイバが添接され加熱融着し
て延伸し３方向に分岐する光分岐結合部を形成する光フ
ァイバ型カプラの製造方法において、前記加熱融着して
延伸する際に少なくとも１本の光ファイバの延伸長を他
の光ファイバの延伸長と変えることによって光分岐結合
部の３方向の出射光ファイバに波長選択性を与えること
を特徴とする光ファイバ型カプラの製造方法。6. A method of manufacturing an optical fiber type coupler in which three optical fibers are spliced together, heat-fused and stretched to form an optical branching / coupling portion branched in three directions, wherein the heat-fusion is performed and stretched. At this time, by changing the extension length of at least one optical fiber to the extension length of the other optical fiber, wavelength selectivity is given to the output optical fibers in the three directions of the optical branching / coupling portion. Production method. 【請求項７】 光分岐結合部を並列に添接して加熱融着
して延伸することを特徴とする請求項６記載の光ファイ
バ型カプラの製造方法。7. The method of manufacturing an optical fiber type coupler according to claim 6, wherein the optical branching and coupling portions are attached in parallel, heat fused and stretched. 【請求項８】 延伸長を変える光ファイバが中央の光フ
ァイバであることを特徴とする請求項７記載の光ファイ
バ型カプラの製造方法。8. The method of manufacturing an optical fiber type coupler according to claim 7, wherein the optical fiber whose extension length is changed is the central optical fiber.
JP18139494A 1994-08-02 1994-08-02 Optical fiber type coupler and its production Pending JPH0843669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18139494A JPH0843669A (en) 1994-08-02 1994-08-02 Optical fiber type coupler and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18139494A JPH0843669A (en) 1994-08-02 1994-08-02 Optical fiber type coupler and its production

Publications (1)

Publication Number Publication Date
JPH0843669A true JPH0843669A (en) 1996-02-16

Family

ID=16099980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18139494A Pending JPH0843669A (en) 1994-08-02 1994-08-02 Optical fiber type coupler and its production

Country Status (1)

Country Link
JP (1) JPH0843669A (en)

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