JPH0792313A - Optical fiber type diffraction grating - Google Patents
Optical fiber type diffraction gratingInfo
- Publication number
- JPH0792313A JPH0792313A JP5233824A JP23382493A JPH0792313A JP H0792313 A JPH0792313 A JP H0792313A JP 5233824 A JP5233824 A JP 5233824A JP 23382493 A JP23382493 A JP 23382493A JP H0792313 A JPH0792313 A JP H0792313A
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- optical fiber
- refractive index
- core
- light
- 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
Landscapes
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Lasers (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
(57)【要約】
【目的】 反射率が大きく、選択波長の変更も可能な光
ファイバー型回折格子を提供する。
【構成】 低分子化合物を分散させたポリマーまたはポ
リシランからなるコアを具備した光ファイバー構造をな
し、光の照射によりコアに周期的な屈折率変化を与えて
回折格子が形成される。(57) [Abstract] [Purpose] To provide an optical fiber type diffraction grating having a large reflectance and capable of changing the selected wavelength. [Structure] An optical fiber structure having a core made of a polymer or polysilane in which a low molecular weight compound is dispersed is formed, and a diffraction grating is formed by giving a periodic refractive index change to the core by irradiation of light.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コアに周期的な屈折率
変化を与えて回折格子を形成する光ファイバー型回折格
子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber type diffraction grating which forms a diffraction grating by periodically changing the refractive index of a core.
【０００２】[0002]
【従来の技術】光ファイバーのコアに周期的な屈折率の
変化を与えて回折格子を形成した光ファイバー型回折格
子は、従来型の回折格子に比べてきわめて小型であるう
え、他の光ファイバーとの接続も容易である。このた
め、光ファイバー型回折格子は特定の波長の光のみを反
射するフィルターとして利用でき、分布帰還型共振器と
してレーザーに応用されたり、波長分割器として用いら
れたり、さらにはファイバーセンサー、多重通信用分波
器、ファイバーセンサーなどへの応用が検討されてい
る。2. Description of the Related Art An optical fiber type diffraction grating in which a diffraction grating is formed by giving a periodic change in refractive index to the core of an optical fiber is extremely small in size as compared with a conventional type diffraction grating and is connected to other optical fibers. Is also easy. For this reason, the optical fiber type diffraction grating can be used as a filter that reflects only the light of a specific wavelength, is applied to a laser as a distributed feedback resonator, is used as a wavelength divider, and is also used for fiber sensors and multiplex communication. Applications for duplexers and fiber sensors are being studied.
【０００３】最初の光ファイバー型回折格子は、アルゴ
ンレーザー光を光ファイバーに入射して光ファイバー端
面からの反射波との干渉により定在波を立て、周期的な
屈折率変化を誘起するものであった。しかし、この技術
では反射波長がアルゴンレーザーの波長に限られるとい
う欠点があった。The first optical fiber type diffraction grating is one in which an argon laser beam is incident on an optical fiber and a standing wave is generated by interference with a reflected wave from the end face of the optical fiber to induce a periodic change in refractive index. However, this technique has a drawback that the reflection wavelength is limited to the wavelength of the argon laser.
【０００４】近年（１９８９年）、２４０ｎｍ付近の紫
外光を光ファイバーの側面の２方向から照射し、その干
渉縞に応じた屈折率変化を誘起する側面書き込み型回折
格子が開発された。この技術では、書き込み光の角度変
化により干渉縞の間隔を変えられるので、回折格子の反
射波長を自由に変化させることができる。In recent years (1989), a side-writing type diffraction grating has been developed which irradiates ultraviolet light near 240 nm from two directions on the side surface of an optical fiber and induces a change in the refractive index according to the interference fringes. In this technique, the interval of the interference fringes can be changed by changing the angle of the writing light, so that the reflection wavelength of the diffraction grating can be freely changed.
【０００５】現在、側面書き込み型回折格子はコア材料
としてガラスを用いたもので実現されている。しかし、
ガラスでは光照射によって屈折率がわずかに１０-4程度
しか変化しないため、反射率が小さいという欠点があ
る。また、選択波長を変えるためには、コア材料そのも
のの交換が必要であるという欠点がある。At present, a side-writing type diffraction grating is realized by using glass as a core material. But,
Since the refractive index of glass changes only about 10 −4 by light irradiation, it has a drawback of low reflectance. Further, there is a drawback that the core material itself needs to be replaced in order to change the selected wavelength.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、これまでに
提案されている光ファイバー型回折格子の欠点を解消
し、反射率が大きく、さらには選択波長の変更も可能な
光ファイバー型回折格子を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of the optical fiber type diffraction gratings proposed so far, and provides an optical fiber type diffraction grating having a large reflectance and capable of changing the selected wavelength. The purpose is to do.
【０００７】[0007]
【課題を解決するための手段と作用】本発明の光ファイ
バー型回折格子は、低分子化合物を分散させたポリマー
またはポリシランからなるコアを具備した光ファイバー
構造をなし、光の照射により前記コアに周期的な屈折率
変化を与えて回折格子が形成されてなることを特徴とす
るものである。The optical fiber type diffraction grating of the present invention has an optical fiber structure having a core made of polymer or polysilane in which a low molecular weight compound is dispersed, and the core is periodically irradiated with light. It is characterized in that a diffraction grating is formed by giving a great change in refractive index.
【０００８】本発明において、光ファイバー構造とは屈
折率の高いコアを屈折率の低いクラドで覆った構造をい
い、狭義の光ファイバーに代表されるような３次元光導
波路だけでなく、２次元光導波路も含むものとする。In the present invention, the optical fiber structure means a structure in which a core having a high refractive index is covered with a clad having a low refractive index, and not only a three-dimensional optical waveguide represented by an optical fiber in a narrow sense but also a two-dimensional optical waveguide. Shall also be included.
【０００９】以下、本発明をさらに詳細に説明する。ま
ず、コアの材料として低分子化合物を分散させたポリマ
ーを用いた光ファイバー型回折格子について説明する。The present invention will be described in more detail below. First, an optical fiber type diffraction grating using a polymer in which a low molecular compound is dispersed as a core material will be described.
【００１０】この場合、低分子化合物としては、所定波
長の光が照射されると、例えば電荷を発生してポリマー
との間で電荷移動を起こして屈折率を変化させるものが
用いられる。このような低分子化合物としては、主鎖ま
たは側鎖にアントラセン、ピレン、フェナントレン、コ
ロネンなどの縮合芳香環またはインドール、カルバゾー
ル、オキサゾール、イソオキサゾール、チアゾール、イ
ミダゾール、ピラゾール、オキサジアゾール、ピラゾリ
ン、チアチアゾール、トリアゾールなどの含窒素複素環
を有する化合物；ヒドラゾン化合物などのドナー性化合
物；キノン構造やシアノ基を持つアクセプター性化合物
が挙げられる。これらのうち少なくとも１個以上の窒素
原子を含有する低分子化合物を用いることが好ましい。In this case, as the low molecular weight compound, for example, a compound which, when irradiated with light of a predetermined wavelength, generates an electric charge and causes a charge transfer with a polymer to change the refractive index. Such low molecular weight compounds include condensed aromatic rings such as anthracene, pyrene, phenanthrene, coronene or indole in the main chain or side chain, carbazole, oxazole, isoxazole, thiazole, imidazole, pyrazole, oxadiazole, pyrazoline, thia. Examples thereof include compounds having a nitrogen-containing heterocycle such as thiazole and triazole; donor compounds such as hydrazone compounds; acceptor compounds having a quinone structure and a cyano group. It is preferable to use a low molecular compound containing at least one nitrogen atom among these.
【００１１】ポリマーは特に限定されず、種々のものを
用いることができる。例えば、ポリエチレン樹脂、ナイ
ロン樹脂、ポリエステル樹脂、ポリカーボネート樹脂、
ポリアリレート樹脂、ブチラール樹脂、ポリスチレン樹
脂、スチレン−ブタジエン共重合体樹脂、ポリビニルア
セタール樹脂、ジアリルフタレート樹脂、シリコーン樹
脂、ポリスルホン樹脂、アクリル樹脂、ポリ酢酸ビニ
ル、ポリフェニレンオキシド樹脂、アルキド樹脂、スチ
レン−無水マレイン酸共重合体樹脂、フェノール樹脂、
パラフィンワックスなどが挙げられる。The polymer is not particularly limited, and various polymers can be used. For example, polyethylene resin, nylon resin, polyester resin, polycarbonate resin,
Polyarylate resin, butyral resin, polystyrene resin, styrene-butadiene copolymer resin, polyvinyl acetal resin, diallyl phthalate resin, silicone resin, polysulfone resin, acrylic resin, polyvinyl acetate, polyphenylene oxide resin, alkyd resin, styrene-maleic anhydride Acid copolymer resin, phenol resin,
Paraffin wax etc. are mentioned.
【００１２】低分子化合物及びポリマーは単独で用いて
もよいし、２種以上混合してもよい。また、これらの成
分に加えて、屈折率変化などに寄与する化合物が含有さ
れていてもよい。The low molecular weight compound and the polymer may be used alone or in combination of two or more kinds. In addition to these components, a compound that contributes to a change in the refractive index may be contained.
【００１３】以上のコア材料を用いて光ファイバーを製
造するには以下のような方法が用いられる。例えば、低
分子化合物を所定の割合で適当なポリマー化合物ととも
に有機溶媒に溶解し、均一溶液とした後、乾燥して円柱
状のコア材を作製する。また、有機溶媒を用いずに、低
分子化合物とポリマーを練り合わせて円柱状のコア材を
作製してもよい。これらの方法に限らず、低分子化合物
をポリマー中に分散できる方法ならばいかなる方法でも
かまわない。一方、コア材より屈折率の低い材質からな
る管状のクラッド材を作製する。これらのコア材及びク
ラッド材を組み合わせてプリフォームを形成した後、こ
れを延伸して光ファイバーを製造する。なお、光ファイ
バーの製造方法はこれに限定されるものではない。The following method is used to manufacture an optical fiber using the above core material. For example, a low molecular weight compound is dissolved in an organic solvent together with an appropriate polymer compound in a predetermined ratio to form a uniform solution, which is then dried to produce a cylindrical core material. Alternatively, a cylindrical core material may be produced by kneading a low molecular weight compound and a polymer without using an organic solvent. Not limited to these methods, any method may be used as long as the low molecular weight compound can be dispersed in the polymer. On the other hand, a tubular clad material made of a material having a lower refractive index than the core material is manufactured. A preform is formed by combining these core materials and clad materials, and then stretched to manufacture an optical fiber. The method for manufacturing the optical fiber is not limited to this.
【００１４】次に、コアの材料としてポリシランを用い
た光ファイバー型回折格子について説明する。この場
合、用いられるポリシランは光照射により部分的にシロ
キサンなどを生成して屈折率が変化するものであり、い
かなる置換基を有するものでもよい。ポリシラン中に
は、モノマー、添加剤、酸素、窒素、水、有機溶媒など
が含有されていてもよい。また、ポリシランに加えて、
他のポリマーが含有されていてもよい。Next, an optical fiber type diffraction grating using polysilane as a core material will be described. In this case, the polysilane used is one which partially forms siloxane or the like by light irradiation to change the refractive index, and may have any substituent. The polysilane may contain a monomer, an additive, oxygen, nitrogen, water, an organic solvent and the like. In addition to polysilane,
Other polymers may be contained.
【００１５】コア材料としてポリシランを用いて光ファ
イバーを製造する場合にも、上述したのと同様な方法を
用いることができる。なお、有機溶媒を用いる場合、ア
ルコール類、ケトン類、アミド類、スルホキシド類、エ
ーテル類、エステル類、芳香族ハロゲン化炭化水素類、
芳香族炭化水素類など種々の有機溶媒を用いることがで
きる。Also in the case of producing an optical fiber using polysilane as the core material, the same method as described above can be used. When using an organic solvent, alcohols, ketones, amides, sulfoxides, ethers, esters, aromatic halogenated hydrocarbons,
Various organic solvents such as aromatic hydrocarbons can be used.
【００１６】本発明において、光ファイバーに回折格子
を形成するためには、例えば、側面の２方向から所定波
長のレーザー光を照射し、その干渉を利用してコアに周
期的な屈折率変化を生じさせる。この際、レーザー光の
照射角度などを適宜設定することにより、所望の回折格
子形状を形成することができる。なお、回折格子の形成
に際しての光の照射方法としては、コアの所定の領域に
のみ光を照射せしめコアに周期的な屈折率変化を与える
ことのできる方法であれば、何ら上述した方法に限定さ
れるものではない。In the present invention, in order to form a diffraction grating in an optical fiber, for example, laser light having a predetermined wavelength is irradiated from two directions on the side surface, and the interference is used to cause a periodic change in the refractive index in the core. Let At this time, a desired diffraction grating shape can be formed by appropriately setting the irradiation angle of the laser light and the like. The method of irradiating light in forming the diffraction grating is not limited to the above-mentioned method as long as it is a method of irradiating light only in a predetermined region of the core and giving a periodical refractive index change to the core. It is not something that will be done.
【００１７】本発明の光ファイバー型回折格子のコアに
用いられる材料は、光照射による屈折率変化が１０-1オ
ーダーと無機ガラスより３桁大きいため、波長選択率す
なわち反射率が高い。The material used for the core of the optical fiber type diffraction grating of the present invention has a change in refractive index of 10 −1 order by light irradiation, which is three orders of magnitude larger than that of inorganic glass, and therefore has a high wavelength selectivity, that is, reflectance.
【００１８】また、低分子化合物を分散させたポリマー
でコアを形成した場合には、長波長の光の照射または加
熱などにより屈折率を可逆的に変化させることができ
る。このため、屈折率の変化した部分を変化前と同等か
それに近い屈折率に戻すことにより、いったん形成され
た回折格子を消去することができる。したがって、必要
に応じて、再び回折格子形状の異なる回折格子を形成す
ることができ、このような操作により選択波長を自由に
変更することも可能となる。When the core is formed of a polymer in which a low molecular weight compound is dispersed, the refractive index can be reversibly changed by irradiation with long wavelength light or heating. Therefore, the diffraction grating that has been formed once can be erased by returning the portion where the refractive index has changed to the refractive index equal to or close to that before the change. Therefore, a diffraction grating having a different diffraction grating shape can be formed again as necessary, and the selection wavelength can be freely changed by such an operation.
【００１９】[0019]
【実施例】以下、本発明の実施例を説明する。 実施例１ Ｎ，Ｎ−ジフェニル−Ｎ，Ｎ−ビス（３−メチルフェニ
ル）−［１，１−ビフェニル］−４，４−ジアミンとポ
リカーボネート（帝人化成製、商品名Ｋ−１３００Ｗ）
を、１：１の重量比となるように１，１，２−トリクロ
ロエタンに溶解して均一溶液とし、乾燥させて円柱状の
コア材を形成した。次に、ポリフッ化ビニリデンを用い
て屈折率のより低い材質からなる管状のクラッド材を形
成した。これらのコア材とクラッド材とを組み合わせて
プリフォームを作製した。さらに、このプリフォームを
延伸して光ファイバーを作製した。EXAMPLES Examples of the present invention will be described below. Example 1 N, N-diphenyl-N, N-bis (3-methylphenyl)-[1,1-biphenyl] -4,4-diamine and polycarbonate (manufactured by Teijin Chemicals, trade name K-1300W)
Was dissolved in 1,1,2-trichloroethane so as to have a weight ratio of 1: 1 to obtain a uniform solution, which was dried to form a cylindrical core material. Next, polyvinylidene fluoride was used to form a tubular clad material made of a material having a lower refractive index. A preform was produced by combining these core materials and clad materials. Further, this preform was stretched to prepare an optical fiber.
【００２０】得られた光ファイバーにＸｅＣｌエキシマ
レーザーからのレーザー光（波長：３０８ｎｍ）をクラ
ッドから照射し、その干渉を利用してコアの屈折率を周
期的に変化させ、回折格子を形成した。この回折格子で
は１５００ｎｍの光に対して７０％の反射率が得られ
た。The obtained optical fiber was irradiated with laser light (wavelength: 308 nm) from a XeCl excimer laser from the clad, and the interference was utilized to periodically change the refractive index of the core to form a diffraction grating. With this diffraction grating, a reflectance of 70% was obtained for light of 1500 nm.
【００２１】また、この回折格子に４５０ｎｍの光を照
射すると、回折格子が消去された。その後、前記と同様
の処理を行うことにより再び回折格子を形成できた。こ
の場合、１５００ｎｍの光に対して６８％の反射率が得
られた。When the diffraction grating was irradiated with light of 450 nm, the diffraction grating was erased. After that, the diffraction grating could be formed again by performing the same process as described above. In this case, a reflectance of 68% was obtained for 1500 nm light.
【００２２】実施例２ 実施例１と同様にして、ジエチルアミノ−ベンズアルデ
ヒド ジフェニルヒドラゾン及びテレフタル酸ジメチル
を分散させたポリカーボネートからなるコアを有する光
ファイバーを作製し、評価を行った。この回折格子では
１３００ｎｍの光に対して８０％の反射率が得られた。
また、この回折格子を８０℃に加熱すると、回折格子が
消去された。Example 2 In the same manner as in Example 1, an optical fiber having a core made of polycarbonate in which diethylamino-benzaldehyde diphenylhydrazone and dimethyl terephthalate are dispersed was prepared and evaluated. With this diffraction grating, a reflectance of 80% was obtained for light of 1300 nm.
Moreover, when this diffraction grating was heated to 80 ° C., the diffraction grating was erased.
【００２３】次いで、光照射により回折格子を形成し
て、７５０ｎｍの光に対するフィルターを作製すること
もできた。さらに、この回折格子を８０℃に加熱する
と、回折格子が消去された。その後、前記と同様の処理
を行うことにより再び回折格子を形成できた。Then, a diffraction grating was formed by irradiation with light, and a filter for 750 nm light could be produced. Furthermore, when this diffraction grating was heated to 80 ° C., the diffraction grating was erased. After that, the diffraction grating could be formed again by performing the same process as described above.
【００２４】実施例３ コア材料としてフェニルメチルポリシランを用いて光フ
ァイバーを作製し、同様の評価を行った。その結果、７
００ｎｍの光に対して７５％の反射率が得られた。Example 3 An optical fiber was prepared by using phenylmethylpolysilane as a core material, and the same evaluation was performed. As a result, 7
A reflectance of 75% was obtained for light of 00 nm.
【００２５】実施例４ コア材料としてジフェニルポリシランを用いて光ファイ
バを作製し、同様の評価を行った。その結果、５５０ｎ
ｍの光に対して９０％の反射率が得られた。Example 4 An optical fiber was prepared by using diphenylpolysilane as a core material, and the same evaluation was performed. As a result, 550n
A reflectance of 90% was obtained for m light.
【００２６】比較例１ コアがガラスからなる光ファイバーについて実施例１と
同様の評価を行った結果、１５００ｎｍの光に対する反
射率はわずかに３７％であった。Comparative Example 1 An optical fiber having a core made of glass was evaluated in the same manner as in Example 1. As a result, the reflectance for light of 1500 nm was only 37%.
【００２７】[0027]
【発明の効果】以上詳述したように本発明によれば、反
射率が大きく、選択波長の変更も可能であり、しかも作
製が容易で取り扱いが簡単な光ファイバー型回折格子を
提供できる。As described in detail above, according to the present invention, it is possible to provide an optical fiber type diffraction grating which has a large reflectance, can change the selected wavelength, and is easy to manufacture and easy to handle.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｈ０１Ｓ 3/08 Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location // H01S 3/08
Claims (1)
はポリシランからなるコアを具備した光ファイバー構造
をなし、光の照射により前記コアに周期的な屈折率変化
を与えて回折格子が形成されてなることを特徴とする光
ファイバー型回折格子。1. An optical fiber structure having a core made of a polymer or polysilane in which a low molecular weight compound is dispersed, and a diffraction grating is formed by giving a periodic refractive index change to the core by irradiation of light. An optical fiber type diffraction grating characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5233824A JPH0792313A (en) | 1993-09-20 | 1993-09-20 | Optical fiber type diffraction grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5233824A JPH0792313A (en) | 1993-09-20 | 1993-09-20 | Optical fiber type diffraction grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0792313A true JPH0792313A (en) | 1995-04-07 |
Family
ID=16961141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5233824A Pending JPH0792313A (en) | 1993-09-20 | 1993-09-20 | Optical fiber type diffraction grating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0792313A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997014983A1 (en) * | 1995-10-16 | 1997-04-24 | Sumitomo Electric Industries, Ltd. | Optical fiber diffraction grating, production method thereof and laser light source |
| JPH09178901A (en) * | 1995-12-26 | 1997-07-11 | Seizo Miyata | Distributed refractive index optical material and its production |
| WO1999042893A1 (en) * | 1998-02-20 | 1999-08-26 | Corning Incorporated | Tunable optical add/drop multiplexer |
| US6389199B1 (en) * | 1999-02-19 | 2002-05-14 | Corning Incorporated | Tunable optical add/drop multiplexer |
| US6787289B2 (en) | 2001-12-21 | 2004-09-07 | Jsr Corporation | Radiation sensitive refractive index changing composition and refractive index changing method |
| US6828078B2 (en) | 2000-08-29 | 2004-12-07 | Jsr Corporation | Composition having refractive index sensitively changeable by radiation and method for forming refractive index pattern |
| WO2005033153A1 (en) | 2003-10-03 | 2005-04-14 | Nitto Denko Corporation | Light refractive index modulation polymer, light refractive index modulation polymer composition and method of controlling refractive index |
| US7071255B2 (en) | 2001-02-19 | 2006-07-04 | Jsr Corporation | Radiation-sensitive composition capable of having refractive index distribution |
| WO2006077889A1 (en) * | 2005-01-19 | 2006-07-27 | Matsushita Electric Industrial Co., Ltd. | Distributed refractive index lens and method for manufacturing the same |
| US7108954B2 (en) | 2000-12-11 | 2006-09-19 | Jsr Corporation | Radiation-sensitive composition changing in refractive index and method of changing refractive index |
| JP2006522350A (en) * | 2003-04-10 | 2006-09-28 | フォルシュングスツェントルム カールスルーエ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Optically transmissive material and use thereof |
| US7125647B2 (en) | 2001-03-13 | 2006-10-24 | Jsr Corporation | Radiation-sensitive composition changing in refractive index and utilization thereof |
| US7320854B2 (en) | 2003-06-25 | 2008-01-22 | Jsr Corporation | Radiation sensitive refractive index changing composition, pattern forming method and optical material |
| JPWO2005114278A1 (en) * | 2004-05-21 | 2008-03-27 | 松下電器産業株式会社 | Refractive index distribution type optical member, refractive index distribution type optical member manufacturing method, optical module, and optical module manufacturing method |
| US7378224B2 (en) | 2003-07-14 | 2008-05-27 | Jsr Corporation | Method for forming pattern, and optical element |
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1993
- 1993-09-20 JP JP5233824A patent/JPH0792313A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6067392A (en) * | 1995-10-16 | 2000-05-23 | Sumitomo Electric Industries, Ltd. | Optical fiber diffraction grating, a method of fabricating thereof and a laser light source |
| KR100357247B1 (en) * | 1995-10-16 | 2003-01-24 | 스미토모덴키고교가부시키가이샤 | Optical fiber diffraction grating, production method thereof and laser light source |
| WO1997014983A1 (en) * | 1995-10-16 | 1997-04-24 | Sumitomo Electric Industries, Ltd. | Optical fiber diffraction grating, production method thereof and laser light source |
| JPH09178901A (en) * | 1995-12-26 | 1997-07-11 | Seizo Miyata | Distributed refractive index optical material and its production |
| WO1999042893A1 (en) * | 1998-02-20 | 1999-08-26 | Corning Incorporated | Tunable optical add/drop multiplexer |
| US6438293B1 (en) | 1998-02-20 | 2002-08-20 | Corning Incorporated | Tunable optical add/drop multiplexer |
| US6560386B2 (en) | 1998-02-20 | 2003-05-06 | Louay Eldada | Tunable optical add/drop multiplexer |
| US6389199B1 (en) * | 1999-02-19 | 2002-05-14 | Corning Incorporated | Tunable optical add/drop multiplexer |
| US6828078B2 (en) | 2000-08-29 | 2004-12-07 | Jsr Corporation | Composition having refractive index sensitively changeable by radiation and method for forming refractive index pattern |
| US7108954B2 (en) | 2000-12-11 | 2006-09-19 | Jsr Corporation | Radiation-sensitive composition changing in refractive index and method of changing refractive index |
| US7071255B2 (en) | 2001-02-19 | 2006-07-04 | Jsr Corporation | Radiation-sensitive composition capable of having refractive index distribution |
| US7125647B2 (en) | 2001-03-13 | 2006-10-24 | Jsr Corporation | Radiation-sensitive composition changing in refractive index and utilization thereof |
| US6787289B2 (en) | 2001-12-21 | 2004-09-07 | Jsr Corporation | Radiation sensitive refractive index changing composition and refractive index changing method |
| JP2006522350A (en) * | 2003-04-10 | 2006-09-28 | フォルシュングスツェントルム カールスルーエ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Optically transmissive material and use thereof |
| US7320854B2 (en) | 2003-06-25 | 2008-01-22 | Jsr Corporation | Radiation sensitive refractive index changing composition, pattern forming method and optical material |
| US7378224B2 (en) | 2003-07-14 | 2008-05-27 | Jsr Corporation | Method for forming pattern, and optical element |
| WO2005033153A1 (en) | 2003-10-03 | 2005-04-14 | Nitto Denko Corporation | Light refractive index modulation polymer, light refractive index modulation polymer composition and method of controlling refractive index |
| US7566745B2 (en) | 2003-10-03 | 2009-07-28 | Nitto Denko Corporation | Photochemically refractive-index-changing polymer, photochemically refractive-index-changing polymer composition, and method of refractive index regulation |
| JPWO2005114278A1 (en) * | 2004-05-21 | 2008-03-27 | 松下電器産業株式会社 | Refractive index distribution type optical member, refractive index distribution type optical member manufacturing method, optical module, and optical module manufacturing method |
| WO2006077889A1 (en) * | 2005-01-19 | 2006-07-27 | Matsushita Electric Industrial Co., Ltd. | Distributed refractive index lens and method for manufacturing the same |
| US7710657B2 (en) | 2005-01-19 | 2010-05-04 | Panasonic Corporation | Distributed refractive index lens and method for manufacturing the same |
| US7781124B2 (en) | 2005-04-08 | 2010-08-24 | Nitto Denko Corporation | Hologram recording material |
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