JPH03290629A - Light amplifying parts - Google Patents
Light amplifying partsInfo
- Publication number
- JPH03290629A JPH03290629A JP2092061A JP9206190A JPH03290629A JP H03290629 A JPH03290629 A JP H03290629A JP 2092061 A JP2092061 A JP 2092061A JP 9206190 A JP9206190 A JP 9206190A JP H03290629 A JPH03290629 A JP H03290629A
- Authority
- JP
- Japan
- Prior art keywords
- light
- refractive index
- matching material
- optical
- optical fiber
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 56
- 230000003321 amplification Effects 0.000 claims abstract description 43
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 43
- 239000013307 optical fiber Substances 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims description 45
- 238000005253 cladding Methods 0.000 claims description 14
- 230000000644 propagated effect Effects 0.000 abstract description 4
- 229910052779 Neodymium Inorganic materials 0.000 description 8
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000001902 propagating effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000005383 fluoride glass Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- -1 despronium (Dy) Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- ATINCSYRHURBSP-UHFFFAOYSA-K neodymium(iii) chloride Chemical compound Cl[Nd](Cl)Cl ATINCSYRHURBSP-UHFFFAOYSA-K 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は光増幅部品に関し、光ファイバや導波路を用い
て信号光を伝送しつつ光増幅をするものであり、光通信
分野に適用して有用である。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an optical amplification component, which amplifies light while transmitting signal light using an optical fiber or waveguide, and is applicable to the optical communication field. It is useful.
〈従来の技術〉
従来の光通信用光増幅部品は、光ファイバや導波路（石
英ガラスを中心とするガラス、もしくは結晶材料）の中
に光増幅元素を添加した物が主に用いられている。光増
幅元素としては、エルビウム（Ｅｒ）、ネオジウム（Ｎ
ｄ）、デスプロニウム（Ｄｙ）等の稀土類元素イオンや
遷移金属元素イオンが知られている。これらの光増幅元
素は、上記光ファイバや導波路材料（ホスト材と呼ぶ）
の中でイオン化しているが、このイオン半径はホスト材
固有の値として決定される。従って、ホスト材により光
増幅元素のポンプ波長、増幅波長が決ってしまう。この
ため、光ファイバや導波路として従来検討しているホス
ト材では適切なポンプ波長を選択できない場合が存在す
る。その−例として、ネオジウムを添加した石英ガラス
と弗化物ガラス光ファイバを例にとり説明する。<Conventional technology> Conventional optical amplification components for optical communications mainly use optical fibers or waveguides (glass, mainly quartz glass, or crystalline materials) doped with optical amplification elements. . As light amplification elements, erbium (Er), neodymium (N
d), rare earth element ions such as despronium (Dy), and transition metal element ions are known. These optical amplification elements are used in the optical fiber and waveguide materials (called host materials) mentioned above.
The ionic radius is determined as a value specific to the host material. Therefore, the pump wavelength and amplification wavelength of the optical amplification element are determined by the host material. For this reason, there are cases in which an appropriate pump wavelength cannot be selected for host materials conventionally considered for optical fibers and waveguides. As an example, silica glass doped with neodymium and fluoride glass optical fiber will be explained.
従来、ネオジウムは、光通信用波長の一つである１、３
μｍ帯の増幅元素として注目され検討されていた。これ
は、光通信用の伝送媒体が石英ガラスによる光ファイバ
であったことから、この中に添加して増幅特性を検討す
るものが主であった。その構成を第６図（ＪＬ） （ｂ
）に示す。０１は光ファイバのコア、０２はクラッドで
ある。従来では、第６図（ａ）に示すようにコア０１に
光増幅元素が添加されたり、第６図（ｂ）に示すように
クラッド０２に光増幅元素が添加されている。つまりコ
ア０１またはクラッド０２のいずれかに光増幅元素を添
加している。ところで、ネオジウムでは、ポンプ波長と
して７８０ ｎｍが有望であった。Conventionally, neodymium has been used at wavelengths of 1 and 3, which is one of the wavelengths for optical communication.
It has been attracting attention and being studied as an amplifying element in the μm band. Since the transmission medium for optical communication was an optical fiber made of silica glass, the main purpose was to add it to the fiber to study its amplification characteristics. Its configuration is shown in Figure 6 (JL) (b
). 01 is the core of the optical fiber, and 02 is the cladding. Conventionally, an optical amplifying element is added to the core 01 as shown in FIG. 6(a), or an optical amplifying element is added to the cladding 02 as shown in FIG. 6(b). In other words, a light amplifying element is added to either the core 01 or the cladding 02. By the way, for neodymium, 780 nm was a promising pump wavelength.
これは、音響家電品を中心に広く使用されている高出力
半導体し一ザ（Ｇａ ＡＩ Ａｓレーザ）の発振波長と
一致し、ポンプ光源の小型化、少電力化を図ることがで
きるからである。しかしながら、石英ガラスがホスト材
の場合、このポンプ波長はエキサイテツド・ステート・
アブソープシ貫ンのため、反転分布をを有効に形成する
ことができず動車的な光増幅特性を得ることが困叢であ
った。ところが、弗化物ガラスをホスト材に用いた場合
は、このネオージウムのイオン半径が変化し７８０ ｎ
ｍのポンプ波長でエキサイテツド・ステート・アブソー
プシνンが起こりに＜＜、光増幅特性の向上が図れるこ
とが知られている。しかし、弗化物ガラスは強度が低（
、また潮解性を有するため光ファイアや導波路としての
実用的な使用には問題が多い。This is because the oscillation wavelength matches the oscillation wavelength of high-power semiconductor lasers (Ga AI As lasers), which are widely used in audio home appliances, making it possible to miniaturize the pump light source and reduce power consumption. . However, when fused silica is the host material, this pump wavelength is
Because of absorption penetration, population inversion cannot be effectively formed, and it has been difficult to obtain dynamic optical amplification characteristics. However, when fluoride glass is used as a host material, the ionic radius of neodymium changes to 780 nm.
It is known that an excited state absorption v<< occurs at a pump wavelength of m and that optical amplification characteristics can be improved. However, fluoride glass has low strength (
Also, because it has deliquescent properties, there are many problems in practical use as optical fibers and waveguides.
以上説明したように、ホスト材により光増幅特性が大き
く変化することから、光ファイバや導波路そのものに光
増幅元素を添加せず、これらホスト材に依存しない光増
幅部品が実現できれば、その波及効果は著しく大きい。As explained above, the optical amplification characteristics change greatly depending on the host material, so if optical amplification components that do not depend on these host materials can be realized without adding optical amplification elements to the optical fiber or waveguide itself, the ripple effect will be is significantly large.
〈発明が解決しようとする課題〉
以上述べたように、従来の光増幅部品は、光を伝搬させ
るものをホスト材とするため、その材質により有効なポ
ンプ波長を選択できない欠点があった。<Problems to be Solved by the Invention> As described above, conventional optical amplification components use a material that propagates light as a host material, and therefore have the drawback that an effective pump wavelength cannot be selected depending on the material.
本発明の目的は、前記の欠点を解決するため、光増幅元
素を添加した任意に選択できる屈折率整合物質と伝搬光
とをエバネセント・モード結合させることにより、光フ
ァイバや°導波路の材質に依存せず、屈折率！合物質の
材質を選択することによりポンプ波長の選定を可能とし
た光増幅部品を提供することにある。An object of the present invention is to solve the above-mentioned drawbacks by evanescently coupling propagating light with an arbitrarily selected refractive index matching material doped with an optical amplification element, thereby improving the material of optical fibers and waveguides. Refractive index independent! It is an object of the present invention to provide an optical amplification component in which the pump wavelength can be selected by selecting the composite material.
く課題を解決するための手段〉
本発明は、細くした光ファイバや導波路の周囲に、光増
幅元素を添加した任意に選択できる屈折率整合物質を配
し、この屈折率整合物質と伝搬光をエバネセント・モー
ド結合させることにより、光ファイバや導波路からしＡ
出たポンプ光と信号光が屈折率整合物質内部の光増幅元
素と作用するため、光ファイバや導波路の材質に依存せ
ず最適なポンプ波長の選定を可能としている。Means for Solving the Problems> The present invention arranges an arbitrarily selected refractive index matching material doped with an optical amplification element around a thin optical fiber or waveguide, and combines this refractive index matching material with propagating light. By evanescent mode coupling of
Since the emitted pump light and signal light interact with the optical amplification element inside the refractive index matching material, it is possible to select the optimal pump wavelength regardless of the material of the optical fiber or waveguide.
く作 用〉 本発明の基本的な構造図を第１図に示す。For Kusaku A basic structural diagram of the present invention is shown in FIG.
１は光ファイバもしくは導波路のコア、２はそのクラッ
ドであり、領域りにおいて細くされている。この領域り
の周囲には光増幅元素を添加した屈折率整合物質３が配
しである。1 is the core of the optical fiber or waveguide, and 2 is its cladding, which is made thinner in the region. A refractive index matching material 3 doped with a light amplifying element is arranged around this region.
屈折率整合物質３の屈折率は光ファイバ若しくは導波路
のコアの屈折率よりも小さい。The refractive index of the index matching material 3 is smaller than the refractive index of the core of the optical fiber or waveguide.
このような構造の光増幅部品において、伝搬光は領域り
に近づ（にしたがいコア１からクラッド２にしみ出して
、領域りではクラツド２全体と屈折率整合物質３を伝搬
する。領域しではコア１は充分小さ（、はとんど伝搬に
寄与しない。このように伝搬光がクラッドにしみ出て伝
搬するモードをエバネセント・モードという。このとき
の導波は、クラッド２とこれを取り囲む外部の屈折率整
合物３の屈折率差により達成され、伝搬のモードは最低
次の偶数と奇数モードに分離していると考えられている
。領域り通過後に伝搬光は再度コア１に結合する。In an optical amplification component having such a structure, the propagating light approaches the region (as it approaches the region, it leaks out from the core 1 to the cladding 2, and propagates through the entire cladding 2 and the refractive index matching material 3 in the region. The core 1 is sufficiently small (and hardly contributes to propagation. The mode in which the propagating light leaks into the cladding and propagates in this way is called an evanescent mode. In this case, the waveguide is formed by the cladding 2 and the surrounding external This is achieved by the refractive index difference of the refractive index matching material 3, and the propagation mode is considered to be separated into the lowest even and odd modes.
従って、伝搬光がポンプ光と信号光である場合、屈折率
整合物質３内に添加された光増幅元素と作用して、光増
幅が達成される。光増幅元素は屈折率整合物質３内に存
在するため、光ファイバや導波路の材質に依存せず屈折
率整合物質３によりそのイオン半径が決定され、ポンプ
波長を選択することができる。Therefore, when the propagating light is pump light and signal light, optical amplification is achieved by interacting with the optical amplification element added in the refractive index matching material 3. Since the optical amplifying element is present in the refractive index matching material 3, its ionic radius is determined by the refractive index matching material 3 regardless of the material of the optical fiber or waveguide, and the pump wavelength can be selected.
以上説明したように、屈折率整合物質３の材質を変化さ
せることにより、光コアイノ（や導波路の材質に依存せ
ずポンプ波長を決定することができる。これは、光ファ
イバもしくは導波路のクラッドに光増幅元素が添加され
ていても同様に作用する。また、屈折率整合物質として
は、温度変化時に屈折率が変化するものや電圧印加時に
屈折率が変化するものもｉｔられ、ポツティング（プラ
スチック、低融点ガラス、液晶等）や蒸着（ガラス、液
晶等）など、既に光フアイバ関連の部品で実績のある製
造技術を利泪して領域りに対して光学的に接触されるこ
とが可能である。As explained above, by changing the material of the refractive index matching material 3, the pump wavelength can be determined independently of the material of the optical core (or waveguide). It works in the same way even if a light amplifying element is added to the material.Furthermore, as refractive index matching materials, materials whose refractive index changes when temperature changes or materials whose refractive index changes when voltage is applied are also used. By leveraging manufacturing technologies that have already been proven for optical fiber-related parts, such as glass, low melting point glass, liquid crystal, etc.) and vapor deposition (glass, liquid crystal, etc.), optical contact can be made to the area. be.
く実 施 例〉
以下、本発明の実施例について図面を参照して説明する
。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第２図は本発明の第１の実施例を示す構成図である。２
１は信号光光源、２２は信号光受光部である。２３はポ
ンプ光光源、２４ば通信用光ファイバ、２５はポンプ光
と信号光を合波する光カプラである。領域りは、第１図
に示すのと同様に、光ファイバ２４が細径化された領域
であり、その周囲に光増幅元素を含む屈折率整合物質３
が配されている。屈折率整合物質３の屈折率は光ファイ
バ２４の屈折率よりも小さい。ここでは、塩化ネオジウ
ムを溶解した液体を用いた場合について説明する。なお
、光ファイバを細径化するには、バーナーにより領域り
の部分を徐々に加熱しつつ、光ファイバに軽い張力を与
えるごとにより、実現できる。FIG. 2 is a block diagram showing a first embodiment of the present invention. 2
1 is a signal light source, and 22 is a signal light receiver. 23 is a pump light source, 24 is an optical fiber for communication, and 25 is an optical coupler for combining pump light and signal light. As shown in FIG. 1, the region is a region where the optical fiber 24 is made thinner, and the refractive index matching material 3 containing the light amplifying element is surrounded by the region.
are arranged. The refractive index of the refractive index matching material 3 is smaller than the refractive index of the optical fiber 24. Here, a case will be described in which a liquid in which neodymium chloride is dissolved is used. Note that the diameter of the optical fiber can be reduced by gradually heating the area with a burner and applying a slight tension to the optical fiber.
本実施例において、光増幅する信号光の波長を信号光光
源２１により１．３μｍに設定し、信号光受光部２２と
して光スペクトラムアナライザを用い受光強度を測定し
た。ポンプ光光源２３としては７８０ ｎｍを発振波長
とする高出力半導体レーザ（Ｇａ ＡＩ Ａｓレーザ）
を用いた。ポンプ光有無における信号光の強度変化を測
定したところ約１０ｄＢの増幅度が得られた。これ（よ
、石英ガラスをホスト材料とした光フアイバ増幅部分に
比べ５倍以上の増幅度であった。更に、屈折率整合物質
３のみならず光ファイバ２４のクラッドにもネオジウム
を添加した場合には、約１０．５ｄＢの増幅度が得られ
増幅度がさらに向上した。In this example, the wavelength of the signal light to be optically amplified was set to 1.3 μm by the signal light light source 21, and the received light intensity was measured using an optical spectrum analyzer as the signal light receiver 22. The pump light source 23 is a high-power semiconductor laser (Ga AI As laser) with an oscillation wavelength of 780 nm.
was used. When the intensity change of the signal light was measured with and without the pump light, an amplification degree of about 10 dB was obtained. The amplification factor was more than five times that of the optical fiber amplification section using silica glass as the host material.Furthermore, when neodymium was doped not only in the refractive index matching material 3 but also in the cladding of the optical fiber 24, In this case, an amplification degree of about 10.5 dB was obtained, and the amplification degree was further improved.
第３図ｔよ本発明の第２の実施例を示す。本実施例では
、領域りにおいて２本の光ファイバが溶融延伸して接合
しており、その周囲に１まネオジウムを添加した屈折率
整合物質３を配し、屈折率整合物質３はヒータ２６によ
りそ引折率が変化させられろ、信号光光源２１う）らの
波長１．３μｍの信号光は、ヒータ２６が通電されてい
ないときに１よ、信号光受光部２２に伝搬する。このと
き、ポンプ光光源２３を作動させると、屈折率整合物質
３内部に添加されたネオジウムにより約８Ｂ増幅した。FIG. 3t shows a second embodiment of the present invention. In this embodiment, two optical fibers are melt-stretched and bonded in a region, and a refractive index matching material 3 doped with neodymium is placed around it, and the refractive index matching material 3 is heated by a heater 26. When the deflection index is changed, the signal light with a wavelength of 1.3 μm from the signal light source 21 is propagated to the signal light receiving section 22 when the heater 26 is not energized. At this time, when the pump light source 23 is activated, the neodymium doped inside the refractive index matching material 3 amplifies the light by about 8B.
この状態で、と−夕２６に通電し、屈折率整合物質３の
屈折率を約０．０１変化させたときには、伝搬定数が変
化するため、信号光は領域して切り替わり信号光受光部
２２′に受光された。このときの増幅度；よ約９ｄＢで
あった。In this state, when power is applied to the filter 26 to change the refractive index of the refractive index matching material 3 by about 0.01, the propagation constant changes, so the signal light is switched in a region, and the signal light receiver 22' The light was received by The amplification degree at this time was about 9 dB.
以上から、屈折率整合物質３１は、添加した光増幅元素
により信号光の増幅を行うと共に、屈折率変化により信
号光の切替も可能であることが明かとなった。From the above, it has become clear that the refractive index matching material 31 can not only amplify the signal light using the optical amplification element added thereto, but also switch the signal light by changing the refractive index.
第４図及び第５図ｆａ） ｆｂｌ ＋よ、本発明の第３
の実施例を示す。本実施例は導波路を用いた光増幅部品
である。この光増幅部品では、周知のスパッタリング法
や拡散法により、基板３１上にコア３２及びクラッド３
３が形成されており、しかもコア３２は領域りで細幅と
なっている。そして領域りにおいて、細幅となっている
コア３２の両側には、屈折率整合物質３３が形成されて
いる。屈折率整合物質３４は、その屈折率がコ１３２の
屈折率よりも小さくクラッド３３の屈折率よりも大きく
、また光増幅元素を含んでいる。Figures 4 and 5 fa) fbl +, the third aspect of the present invention
An example is shown below. This example is an optical amplification component using a waveguide. In this optical amplification component, a core 32 and a cladding 3 are formed on a substrate 31 by a well-known sputtering method or a diffusion method.
3 is formed, and the core 32 has a narrow width in the region. In the region, a refractive index matching material 33 is formed on both sides of the narrow core 32. The refractive index matching material 34 has a refractive index smaller than that of the material 132 and larger than that of the cladding 33, and contains a light amplifying element.
本実施例モは、信号光及びポンプ光をコア３２に通すと
、領域りにおいてこれら光がコア３２外にしみ出て屈折
率整合物質３４中を進光して光増幅される。なお、屈折
率整合物質３４の近傍に位置するクラッド中に、光増幅
元素を含ませてもよく、このようにすれば更に増幅度が
向上する。また屈折率整合物質３４の屈折率を変化させ
る手段、例えば加熱用のヒータや電界印加用の手段を備
えることもできる。かかる屈折率変化手段を備えれば、
第３図に示す実施例と同様に、出力光の切換ができる。In this embodiment, when the signal light and the pump light are passed through the core 32, these lights seep out of the core 32 in a certain area, travel through the refractive index matching material 34, and are optically amplified. Note that an optical amplifying element may be included in the cladding located near the refractive index matching material 34, and in this way, the amplification degree is further improved. It is also possible to provide means for changing the refractive index of the refractive index matching material 34, such as a heater for heating or means for applying an electric field. If such a refractive index changing means is provided,
Similarly to the embodiment shown in FIG. 3, the output light can be switched.
〈発明の効果〉
以上説明したように、本発明によれば、任意の波長のポ
ンプ光を使用して光増幅することのできる光増幅部品を
提供することができる。また、本発明によれば、従来に
比べ増幅度の大きな光増幅部品を実現できるので、光フ
ァイバを用いた光伝送方式に本発明を導入することによ
り、増幅と光路の設定に自由度を与え、故障や災害時の
容易な切替ができ、ひいてはサービスの品質を向上する
ことができる。<Effects of the Invention> As described above, according to the present invention, it is possible to provide an optical amplification component that can perform optical amplification using pump light of any wavelength. Furthermore, according to the present invention, it is possible to realize an optical amplification component with a higher amplification degree than the conventional one, so by introducing the present invention into an optical transmission system using an optical fiber, a degree of freedom is provided in setting the amplification and optical path. , it is possible to easily switch over in the event of a breakdown or disaster, and as a result, the quality of service can be improved.
第１図は本発明の基本構成を示す図、第２図は本発明の
第１の実施例を示す構成図、第３図は本発明の第２の実
施例を示す構成図、第４図は本発明の第３の実施例を示
す構成図、第５図（ａｔは第４図のＡ−Ａ’断面を示す
断面図、第５図（ｂｌは第４図のＢ−Ｂ’断面を示す断
面図、第６図（ａ） （ｂｌは従来の光増幅部品を示す
断面図である。
図 面 中
０１、 １ ３２はコア、
０２．２．３３はクラッド、
３．３４は屈折率整合物質、
２１は信号光光源、
２２．２２’は信号光受光部、
２３はポンプ光光源、
２４は通信用光ファイバ、
２５は光カプラ、
２６はヒータ、
３１は基板である。
第１図FIG. 1 is a diagram showing the basic configuration of the present invention, FIG. 2 is a configuration diagram showing a first embodiment of the invention, FIG. 3 is a configuration diagram showing a second embodiment of the invention, and FIG. 5 is a block diagram showing the third embodiment of the present invention, FIG. 5 (at is a sectional view taken along the line AA' in FIG. 4, and FIG. 6(a) (bl is a sectional view showing a conventional optical amplification component. In the drawing, 01, 132 are cores, 02.2.33 are claddings, and 3.34 is a refractive index matching. 21 is a signal light source, 22, 22' is a signal light receiver, 23 is a pump light source, 24 is a communication optical fiber, 25 is an optical coupler, 26 is a heater, and 31 is a substrate.
Claims (3)
細くし、前記光ファイバもしくは導波路のうち細くした
部分の周囲に、少なくとも一種類以上の光増幅元素を含
み且つ屈折率が前記光ファイバの屈折率もしくは導波路
のコアの屈折率よりも小さい屈折率整合物質を配したこ
とを特徴とする光増幅部品。(1) A part of the optical fiber or a part of the core of the waveguide is made thin, and the part of the optical fiber or waveguide that is made thin includes at least one type of optical amplification element and has a refractive index of An optical amplification component characterized by disposing a refractive index matching material that is smaller than the refractive index of an optical fiber or the refractive index of a waveguide core.
路は、そのクラッドの一部に光増幅元素を含むことを特
徴とする光増幅部品。(2) The optical amplification component according to claim (1), wherein the optical fiber or waveguide includes an optical amplification element in a part of its cladding.
物質の屈折率を変化させる屈折率可変手段を備えたこと
を特徴とする光増幅部品。(3) The optical amplification component according to claim (1) or (2), characterized by comprising a refractive index variable means for changing the refractive index of the refractive index matching material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2092061A JPH03290629A (en) | 1990-04-09 | 1990-04-09 | Light amplifying parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2092061A JPH03290629A (en) | 1990-04-09 | 1990-04-09 | Light amplifying parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03290629A true JPH03290629A (en) | 1991-12-20 |
Family
ID=14043970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2092061A Pending JPH03290629A (en) | 1990-04-09 | 1990-04-09 | Light amplifying parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03290629A (en) |
-
1990
- 1990-04-09 JP JP2092061A patent/JPH03290629A/en active Pending
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