JPH07157324A - Method for manufacturing optical fiber for optical component - Google Patents
Method for manufacturing optical fiber for optical componentInfo
- Publication number
- JPH07157324A JPH07157324A JP5340195A JP34019593A JPH07157324A JP H07157324 A JPH07157324 A JP H07157324A JP 5340195 A JP5340195 A JP 5340195A JP 34019593 A JP34019593 A JP 34019593A JP H07157324 A JPH07157324 A JP H07157324A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- optical fiber
- length direction
- diameter
- uniform
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/18—Axial perturbations, e.g. in refractive index or composition
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
(57)【要約】
【目的】 長さ方向にＭＦＤや分散値が変化する光部品
用光ファイバの製造方法を提供する。
【構成】 ＶＡＤ法と外付け法の併用により、ＧｅＯ2
−ＳｉＯ2 コア−ＳｉＯ2 クラッドロッドを作製する。
このロッドのクラッド外周部を切削して長さ方向にテー
パ状のロッドとする。このテーパ状ロッドを延伸して外
径が長さ方向に均一な光ファイバ母材とする。この母材
のコア径は必然的に長さ方向に変化したものとなる。こ
の母材を均一外径に線引きすることにより、長さ方向に
コア径が変化した。ＭＦＤおよび分散値が長さ方向に徐
々に変化した光ファイバが得られる。
(57) [Abstract] [Purpose] To provide a method of manufacturing an optical fiber for an optical component in which the MFD and the dispersion value change in the length direction. [Structure] By using the VAD method and the external method together, GeO 2
Making -SiO 2 core -SiO 2 clad rod.
The outer peripheral portion of the clad of this rod is cut to form a taper rod in the length direction. The tapered rod is extended to form an optical fiber preform having an outer diameter that is uniform in the length direction. The core diameter of this base material necessarily changes in the length direction. By drawing this base material to a uniform outer diameter, the core diameter changed in the length direction. An optical fiber in which the MFD and the dispersion value gradually change in the length direction is obtained.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、光ファイバ型部品と
して使用される光ファイバの製造方法に関するもので、
特に長さ方向に分散値やＭＦＤを変化させた特性を有す
るものを提供する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical fiber used as an optical fiber type component,
In particular, the thing which has the characteristic which changed the dispersion value and MFD in the length direction is provided.
【０００２】[0002]
【従来の技術】光ファイバ網が広がり、多くのところで
光ファイバが使用されるようになるといろいろな用途の
光ファイバが必要とされる。例えば、数百ｍ〜数百ｋｍ
のファイバの長さ方向に分散値やＭＦＤが徐々に変化す
る光ファイバ等である。従来この種の光ファイバは次の
ようにして作製していた。まず、ＶＡＤ法により所望の
屈折率分布を持つようなＧｅＯ2 ドープＳｉＯ2多孔質
ガラスプリフォームを作製する。この多孔質ガラスプリ
フォームをおよそ１０００℃のＨｅと塩素系ガス雰囲気
で脱水処理し、その後、およそ１５００℃のＨｅ雰囲気
で透明ガラス化する。このロッドを延伸してコア母材と
し、その周りにクラッディング用の純粋ＳｉＯ2 からな
る多孔質ガラス層を外付けして同様に脱水、透明ガラス
化して光ファイバ母材とする。この光ファイバ母材はそ
の長さ方向に構造的にも組成的にも均一に作製されてい
るので、線引きの際に例えば光ファイバ母材の降下速度
を変化させることで光ファイバ径を徐々に変化させる。
こうして、長さ方向に分離値やＭＦＤが徐々に変化する
光ファイバが得られる。2. Description of the Related Art As optical fiber networks spread and optical fibers are used in many places, optical fibers for various purposes are required. For example, hundreds of meters to hundreds of kilometers
Is an optical fiber whose dispersion value and MFD gradually change in the length direction of the fiber. Conventionally, this type of optical fiber has been manufactured as follows. First, a GeO 2 -doped SiO 2 porous glass preform having a desired refractive index distribution is manufactured by the VAD method. This porous glass preform is dehydrated in an atmosphere of He and chlorine-based gas at about 1000 ° C., and then made into a transparent glass in an atmosphere of He at about 1500 ° C. This rod is stretched to form a core preform, and a porous glass layer made of pure SiO 2 for cladding is externally attached to the core preform, and similarly dehydrated and transparent vitrified to form an optical fiber preform. Since this optical fiber preform is made uniform both structurally and compositionally in the length direction, the optical fiber diameter can be gradually changed by changing, for example, the descending speed of the optical fiber preform during drawing. Change.
In this way, an optical fiber whose separation value and MFD gradually change in the length direction is obtained.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、線引き
の際に長尺にわたって光ファイバの外径を徐々に変える
ために母材の降下速度を変化させるのは制御が困難とい
うことがあった。また、光ファイバの外径が所定の１２
５μｍから大きくずれることもあり、作製後の測定が困
難であり、また所定の特性のものが得られないというこ
とがあった。However, it was sometimes difficult to control the descending speed of the base material in order to gradually change the outer diameter of the optical fiber over a long length during drawing. In addition, the outer diameter of the optical fiber is 12
There is a case where it is largely deviated from 5 μm, it is difficult to perform measurement after fabrication, and it is sometimes impossible to obtain a product having predetermined characteristics.
【０００４】[0004]
【課題を解決するための手段】この発明は、以上の観点
から比較的に簡単な方法で長さ方向に分散値やＭＦＤの
変化した光部品用光ファイバを得ようとするもので、そ
の特徴とする請求項１記載の発明は、コアとなる部分お
よびクラッドとなる部分の径が共に長さ方向に均一な石
英系ガラスロッドを用意し、このロッドのクラッドとな
る部分の外周部を切削してテーパ状のロッドとなし、こ
のテーパ状のロッドを延伸して均一な外径の光ファイバ
母材となし、しかる後均一な外径の光ファイバに線引き
することにある。なお、テーパ状のロッドを延伸して均
一な外径の光ファイバ母材とするには、例えば次のよう
にすれば良い。すなわち、ロッドを垂直に位置させ、円
筒状の加熱炉内を通過させる。その際、ロッドの上下両
端部をチャックに把持させる。上部チャック、下部チャ
ックともロッドの長さ方向にトラバース可能な移動チャ
ックとし、ロッドの大径の方を上部チャックに、小径の
方を下部チャックに把持させる。このような構成の下
で、下部チャックの降下速度を上部チャックの降下速度
よりも速くする。これにより、コア部がその長さ方向に
変化し、クラッド部外径が長さ方向に均一な延伸母材と
なる。なお、コアの屈折率分布としては長さ方向に一定
であれば良く、ステップ型、グレーテッド型を問わず、
さらには任意のものでも良い。SUMMARY OF THE INVENTION The present invention is intended to obtain an optical fiber for an optical component having a dispersion value or MFD changed in the length direction by a relatively simple method from the above viewpoint. According to the first aspect of the present invention, a silica glass rod is prepared in which the diameter of the core portion and the diameter of the cladding portion are both uniform in the length direction, and the outer peripheral portion of the cladding portion of this rod is cut. To form a tapered rod, and to extend the tapered rod to form an optical fiber preform having a uniform outer diameter, and then draw an optical fiber having a uniform outer diameter. In order to extend the tapered rod to form an optical fiber preform having a uniform outer diameter, for example, the following may be performed. That is, the rod is positioned vertically and passed through a cylindrical heating furnace. At that time, the chuck holds the upper and lower ends of the rod. Both the upper chuck and the lower chuck are movable chucks that can traverse the length direction of the rod, and the rod having a larger diameter is grasped by the upper chuck and the rod having a smaller diameter is grasped by the lower chuck. Under such a configuration, the lowering speed of the lower chuck is made higher than the lowering speed of the upper chuck. As a result, the core portion changes in the lengthwise direction, and the clad portion outer diameter becomes a stretched base material having a uniform lengthwise direction. The refractive index distribution of the core may be constant in the length direction, regardless of whether it is a step type or a graded type.
Further, it may be arbitrary.
【０００５】[0005]
【作用】ロッドの長さはせいぜい５０〜２００ｍｍと短
いので、これをテーパ状に切削することは比較的簡単で
あり、また、テーパ状に切削されたロッドを均一な外径
にすべく延伸速度を徐々に変えることも比較的簡単なた
め、容易に長さ方向に外径が均一な光ファイバ母材を得
ることができる。かくして、コア部は長さ方向に直径が
変化し、外径は均一な光ファイバ母材が容易に得られ
る。Since the length of the rod is as short as 50 to 200 mm at the most, it is relatively easy to cut the rod into a taper shape, and the drawing speed is set so that the taper-cut rod has a uniform outer diameter. Since it is relatively easy to gradually change, it is possible to easily obtain an optical fiber preform having a uniform outer diameter in the length direction. Thus, the diameter of the core portion changes in the length direction, and an optical fiber preform having a uniform outer diameter can be easily obtained.
【０００６】[0006]
〔実施例１〕ＶＡＤ法と外付け法の併用によって、コア
となる部分１０およびクラッドとなる部分１２の径が長
さ方向に均一な石英系ロッド１を作製した。このロッド
１のクラッド部１２の外周を機械的に切削して、図１に
示す一端は当初の外径のままで他端は小径のテーパ状ロ
ッド１とした。次に、このテーパ状ロッド１を延伸して
図２に示すように、長さ方向に均一な外径の光ファイバ
母材２０とした。ロッド１の延伸は図３に示す装置を用
いた。図において、１は垂直に支持されたテーパ状ロッ
ドで、その両端にはダミーのロッド２が取付けられてい
る。３、４はテーパ状ロッド１を把持する上下移動チャ
ックで、上部チャック３はロッド１の上部大径側のダミ
ーロッド２を把持し、下部チャック４はロッド１の下端
の小径側のダミーロッド２を把持する。５は円筒状の抵
抗加熱炉で、６はその内部に配置された炉心管である。Example 1 By using the VAD method and the external attachment method together, a silica-based rod 1 having a core portion 10 and a clad portion 12 whose diameters were uniform in the longitudinal direction was produced. The outer circumference of the clad portion 12 of the rod 1 was mechanically cut to form a tapered rod 1 having a small diameter at one end and a small diameter at the other end shown in FIG. Next, as shown in FIG. 2, the tapered rod 1 was extended to form an optical fiber preform 20 having an outer diameter uniform in the length direction. The device shown in FIG. 3 was used for stretching the rod 1. In the figure, 1 is a vertically supported tapered rod, and dummy rods 2 are attached to both ends thereof. Reference numerals 3 and 4 denote vertical moving chucks for holding the tapered rod 1. The upper chuck 3 holds the dummy rod 2 on the upper large diameter side of the rod 1, and the lower chuck 4 is the dummy rod 2 on the small diameter side at the lower end of the rod 1. To hold. Reference numeral 5 is a cylindrical resistance heating furnace, and 6 is a core tube arranged inside thereof.
【０００７】以上の構成において、加熱炉５に通電して
炉心管６内温度を１８００℃程度に維持する。ロッド１
の下端部が軟化しはじめたところで上下チャック３、４
を下方に向けて降下させる。この両チャック部の降下速
度は、下部チャック４の速度を上部チャック３の速度よ
りも速い速度で降下させるが、炉心管６内に導かれるロ
ッド１の径が次第に大になるにつれて下部チャック４の
速度を次第に速める。両チャック３、４の降下速度は、
炉心管６内温度およびロッド１のテーパーの程度を勘案
して設定される。かくして、図２に示すように外径が均
一な光ファイバ母材が得られる。この光ファイバ母材を
一端から線引きし外径が均一で、コア径が長さ方向に次
第に変化する光ファイバが得られる。なお、ロッド１の
両端にダミーのロッド２を取付けるのは、ロッド１の全
長を極力製品とするためである。With the above construction, the heating furnace 5 is energized to maintain the temperature in the core tube 6 at about 1800 ° C. Rod 1
When the lower end of the
To descend downward. The lowering speed of both chucks lowers the speed of the lower chuck 4 at a speed faster than the speed of the upper chuck 3, but as the diameter of the rod 1 introduced into the core tube 6 gradually increases, the lower chuck 4 moves. Speed up gradually. The descending speed of both chucks 3 and 4 is
It is set in consideration of the temperature inside the core tube 6 and the degree of taper of the rod 1. Thus, an optical fiber preform having a uniform outer diameter can be obtained as shown in FIG. This optical fiber preform is drawn from one end to obtain an optical fiber whose outer diameter is uniform and whose core diameter gradually changes in the length direction. The dummy rods 2 are attached to both ends of the rod 1 in order to make the entire length of the rod 1 a product as much as possible.
【０００８】〔具体例１〕ＶＡＤ法と外付け法の併用に
より、コア部が直径４．６ｍｍφのＧｅＯ2 −ＳｉＯ2
（純粋ＳｉＯ2 との比屈折率差０．８％）、クラッド部
外径が３３ｍｍφのＳｉＯ2 からなり、長さが１００ｍ
ｍＬの光ファイバ用ロッドを作製した。このロッドは、
ファイバ径が１２５．０μｍになるように線引きする
と、波長１．５５μｍにおける分散値が０ｐｓ／ｎｍ／
ｋｍ、ファイバ径が１３７．５μｍになるように線引き
すると波長１．５５μｍにおける分散値が＋５．０ｐｓ
／ｎｍ／ｋｍという１．５５μｍ帯分散シフトファイバ
となるものである。このロッド外周部を一端はそのまま
で、他端が３０ｍｍφとなるようにテーパ状に切削した
後延伸し３０ｍｍφの外径が均一な光ファイバ母材とし
た。この母材をファイバ径１２５．０μｍで線引きし
た。得られた光ファイバは、一端における分散値が波長
１．５５μｍにおいて０ｐｓ／ｎｍ／ｋｍであり、他端
における分散値が波長１．５５μｍにおいて＋５．０ｐ
ｓ／ｎｍ／ｋｍというものであった。[Specific Example 1] By using the VAD method and the external attachment method together, GeO 2 -SiO 2 having a core portion having a diameter of 4.6 mmφ
(Pure relative refractive index difference of 0.8% with SiO 2), a cladding outer diameter is made of SiO 2 of 33Mmfai, length 100m
A mL optical fiber rod was prepared. This rod is
When the fiber diameter is drawn to 125.0 μm, the dispersion value at a wavelength of 1.55 μm is 0 ps / nm /
When the fiber is drawn to have a fiber diameter of 137.5 μm and a dispersion of +5.0 ps at a wavelength of 1.55 μm.
/ Nm / km, which is a 1.55 μm band dispersion-shifted fiber. One end of this rod outer peripheral portion was left as it was, and the other end was cut into a taper shape so as to have a diameter of 30 mm. This base material was drawn with a fiber diameter of 125.0 μm. The obtained optical fiber has a dispersion value at one end of 0 ps / nm / km at a wavelength of 1.55 μm and a dispersion value at the other end of +5.0 p at a wavelength of 1.55 μm.
It was s / nm / km.
【０００９】〔比較例１〕実施例１と同じように、ＶＡ
Ｄ法と外付け法の併用により、コア部が直径４．２ｍｍ
φのＧｅＯ2 −ＳｉＯ2 （純粋ＳｉＯ2 との比屈折率差
Δ＝０．８％）、クラッド部外径が３０ｍｍφのＳｉＯ
2 からなり、長さが１００ｍｍＬの光ファイバ用ロッド
を作製した。このロッドの分散特性は、実施例１と同一
であり、ファイバ径が１２５．０μｍになるように線引
きすると、波長１．５５μｍにおける分散値が０ｐｓ／
ｎｍ／ｋｍ、ファイバ径が１３７．５μｍになるように
線引きすると波長１．５５μｍにおける分散値が＋５．
０ｐｓ／ｎｍ／ｋｍという１．５５μｍ帯分散シフトフ
ァイバとなるものである。この母材を線引きするに際し
て、母材の降下速度を次第に変化させることによって、
先端が１２５．０μｍ、後端が１３７．５μｍの光ファ
イバとした。この光ファイバ作製においてはロッドを切
削するという工程はなくてすむものの、線引きに際して
ファイバ径を徐々に変動させるのに極めて困難をともな
った。COMPARATIVE EXAMPLE 1 As in Example 1, VA
The diameter of the core is 4.2 mm due to the combined use of the D method and the external attachment method.
GeO 2 -SiO 2 of φ (relative refractive index difference Δ = 0.8% with pure SiO 2 ) and SiO of clad portion outer diameter of 30 mmφ
An optical fiber rod consisting of 2 and having a length of 100 mmL was produced. The dispersion characteristics of this rod are the same as in Example 1, and when the fiber diameter is drawn to 125.0 μm, the dispersion value at a wavelength of 1.55 μm is 0 ps /.
When the fiber is drawn so that the fiber diameter is 137.5 μm and the fiber diameter is 13 nm, the dispersion value at the wavelength of 1.55 μm is +5.
It is a 1.55 μm band dispersion shift fiber of 0 ps / nm / km. When drawing this base material, by gradually changing the descending speed of the base material,
The optical fiber had a front end of 125.0 μm and a rear end of 137.5 μm. In the production of this optical fiber, the step of cutting the rod is unnecessary, but it was extremely difficult to gradually change the fiber diameter during drawing.
【００１０】[0010]
【発明の効果】この発明方法によれば、ＭＦＤや分散値
がその長さ方向に変化する光ファイバを得るに際して、
ロッドの段階でクラッドとなる部分の径を長さ方向に均
一になすとともに、コアとなる部分の径を長さ方向に変
化させたものを得、これを線引きする方法であるので、
極めて簡単に所望の特性のものが得られる。According to the method of the present invention, in obtaining an optical fiber whose MFD and dispersion value change in its length direction,
At the rod stage, the diameter of the clad portion is made uniform in the lengthwise direction, and the diameter of the core portion is changed in the lengthwise direction.
It is very easy to obtain the desired properties.
【図１】この発明の一工程におけるテーパ状ロッドの説
明図。FIG. 1 is an explanatory view of a tapered rod in one step of the present invention.
【図２】この発明方法により得られた延伸母材の説明
図。FIG. 2 is an explanatory view of a stretched base material obtained by the method of the present invention.
【図３】この発明方法に用いられる延伸装置の概略説明
図。FIG. 3 is a schematic explanatory view of a stretching device used in the method of the present invention.
１ 石英系ガラスロッド ２ ダミーのロッド ３ 上部チャック ４ 下部チャック ５ 加熱炉 ６ 炉心管 １０ コアとなる部分 １２ クラッドとなる部分 ２０ 光ファイバ母材 1 silica glass rod 2 dummy rod 3 upper chuck 4 lower chuck 5 heating furnace 6 core tube 10 core part 12 clad part 20 optical fiber preform
Claims (1)
分の径が共に長さ方向に均一な石英系ガラスロッドを用
意し、このロッドのクラッドとなる部分の外周部を切削
してテーパ状のロッドとなし、このテーパ状のロッドを
延伸して均一な外径の光ファイバ母材となし、しかるの
ち均一な外径の光ファイバに線引きすることを特徴とす
る光部品用光ファイバの製造方法。1. A tapered glass rod in which a silica glass rod having a core portion and a cladding portion both having a uniform diameter in the longitudinal direction is prepared, and the outer peripheral portion of the cladding portion of the rod is cut. A method for producing an optical fiber for an optical component, which comprises stretching the tapered rod to form an optical fiber preform having a uniform outer diameter, and then drawing the optical fiber having a uniform outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34019593A JP3466251B2 (en) | 1993-12-08 | 1993-12-08 | Method of manufacturing optical fiber for optical component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34019593A JP3466251B2 (en) | 1993-12-08 | 1993-12-08 | Method of manufacturing optical fiber for optical component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07157324A true JPH07157324A (en) | 1995-06-20 |
| JP3466251B2 JP3466251B2 (en) | 2003-11-10 |
Family
ID=18334625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34019593A Expired - Fee Related JP3466251B2 (en) | 1993-12-08 | 1993-12-08 | Method of manufacturing optical fiber for optical component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3466251B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025861A1 (en) * | 1996-12-13 | 1998-06-18 | Corning Incorporated | Method of making optical fiber preform by chemical vapour deposition |
| US6549711B1 (en) | 1998-01-30 | 2003-04-15 | Shin-Etsu Chemical Co., Ltd. | Soliton pulse compression optical fiber and method for making soliton pulse compression optical fiber |
| JP2011228541A (en) * | 2010-04-21 | 2011-11-10 | Photonic Science Technology Inc | Method of manufacturing tapered optical fiber |
-
1993
- 1993-12-08 JP JP34019593A patent/JP3466251B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025861A1 (en) * | 1996-12-13 | 1998-06-18 | Corning Incorporated | Method of making optical fiber preform by chemical vapour deposition |
| US6549711B1 (en) | 1998-01-30 | 2003-04-15 | Shin-Etsu Chemical Co., Ltd. | Soliton pulse compression optical fiber and method for making soliton pulse compression optical fiber |
| JP2011228541A (en) * | 2010-04-21 | 2011-11-10 | Photonic Science Technology Inc | Method of manufacturing tapered optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3466251B2 (en) | 2003-11-10 |
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