WO2004097471A1 - 光伝送装置 - Google Patents
光伝送装置 Download PDFInfo
- Publication number
- WO2004097471A1 WO2004097471A1 PCT/JP2004/005526 JP2004005526W WO2004097471A1 WO 2004097471 A1 WO2004097471 A1 WO 2004097471A1 JP 2004005526 W JP2004005526 W JP 2004005526W WO 2004097471 A1 WO2004097471 A1 WO 2004097471A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- core
- pores
- signal light
- sealed
- Prior art date
Links
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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02319—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by core or core-cladding interface features
- G02B6/02333—Core having higher refractive index than cladding, e.g. solid core, effective index guiding
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02347—Longitudinal structures arranged to form a regular periodic lattice, e.g. triangular, square, honeycomb unit cell repeated throughout cladding
-
- 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
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
-
- 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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
Definitions
- the present invention relates to an optical transmission device.
- a photonic crystal fiber (hereinafter, referred to as a “PC fiber”) is known as an optical fiber that exhibits large wavelength dispersion.
- the PC fiber includes a solid or hollow core extending in the longitudinal direction of the fiber center and a clad provided to cover the core and having a number of pores extending along the core.
- a photonic crystal structure with a periodically changing rate is known as an optical fiber that exhibits large wavelength dispersion.
- the PC fiber includes a solid or hollow core extending in the longitudinal direction of the fiber center and a clad provided to cover the core and having a number of pores extending along the core.
- Japanese Patent Laid-Open Publication No. 2000-32239 discloses that the hollow core of the PC fiber and the pores of the clad are opened to the end face of the fiber. Therefore, it is necessary to melt the end face of the PC fiber to seal the pores of the hollow core and the clad, since foreign matter and the like enter the pores of the hollow core and the clad and deteriorate the optical characteristics. It has been disclosed.
- the size of the sealed section becomes as long as about 1 mm in the melting process.
- Japanese Patent Application Laid-Open No. 2002-3236525 states that the size of the sealing portion is set to a length that hardly affects the optical waveguide. It is unclear because there is no specific dimension, and the length varies depending on the type of fiber.Therefore, it is necessary to repeat the connection loss inspection for each fiber to determine the dimensions of the sealing part, which reduces the work efficiency. It becomes worse and quality varies. Disclosure of the invention
- An object of the present invention is to provide an optical transmission device using a PC fiber that can be connected with low connection loss.
- the present invention provides a process for sealing the pores of the clad at the connection end of the PC fiber, and determines the length of the section in which the pores of the clad are sealed by the sealing process, as a fiber diameter signal. By calculating and setting from conditions such as the incident angle of light, etc., an optical transmission device using a PC fiber that can be connected with low connection loss is configured.
- the present invention provides a light-collecting device for collecting signal light
- a PC fiber for transmitting light through the core,
- An optical transmission device comprising:
- connection end of the PC fiber connected to the light-collecting device has a plurality of pores of the cladding sealed in a section at a predetermined distance L from the fiber end face,
- the length L [u rn] of the section in which the pores of the cladding are sealed is an incident angle of signal light to the PC fiber of 6 ° [°], an outer diameter of the PC fiber D [ ⁇ m] and As a core diameter a [/ m] and a refractive index n in a section where the pores of the clad are sealed,
- connection end of the PC fiber is subjected to a process of sealing the pores of the clad, and the length of the section in which the pores of the clad are sealed by the sealing process is set to: Since the above conditions are set, even if the signal light condensed by the light condensing device is directly transmitted into the fiber, the signal light does not leak out of the fiber, so there is no connection loss and the efficiency is low. Good optical transmission can be performed.
- Another aspect of the present invention is a light source device that emits signal light
- An optical transmission device comprising: At the connection end of the Pc fiber connected to the light source device, a plurality of pores of the clad are sealed,
- the length L [zm] of the section in which the pores of the cladding are sealed is determined by the angle of emergence of the signal light from the light source device to the PC fiber 6> [°] and the distance between the light source device and the fiber end face.
- a process for sealing the clad pores is performed on the connection end of the PC fiber, and the length of the section where the clad pores are sealed by the sealing process is reduced. Since the setting is made so as to satisfy the above conditions, even if the signal light output from the light source device is transmitted into the fiber, the signal light does not leak out of the fiber, so that efficient light can be obtained without connection loss. Transmission can take place.
- FIG. 1 is a perspective view showing a PC fiber according to Embodiments 1 and 2 of the present invention.
- FIG. 2 is a schematic diagram showing an optical transmission device according to Embodiment 1 of the present invention.
- FIG. 3 is a schematic diagram showing an optical transmission device according to Embodiment 2 of the present invention.
- FIG. 1 shows PC Fino 10.
- This PC fiber 10 has a solid core 11 extending in the longitudinal direction at the center of the fiber, and a large number of pores 12 a and 12 a provided so as to cover the core 11 and extending along the core 11. , And a covering portion 13 provided so as to cover the cladding 12. Then, the refractive index of the clad 12 is two-dimensionally periodic. A photonic crystal structure that fluctuates in time is formed, and the signal light (not shown) is confined and propagated in the core 11 surrounded by the photodiode crystal structure.
- connection end of the PC fiber 10 is melted by the heat treatment, whereby the pores 12 a, 12 a,... Of the clad 12 are sealed. At this time, the PC fiber
- connection end of 10 is composed of a core 11, a clad 12, and a coating 13, and as shown in FIG.
- the sealing portion 15 may be formed by fixing a glass rod or the like to the connection end portion of the PC fiber 10 or by forming a resin by filling the pores 12a with a Q.
- connection end of the PC fiber 10 that seals the pores 12 a is connected to the light condensing device 21 that condenses the signal light 22, and is condensed by the light condensing device 21.
- the optical transmission device 20 is configured to propagate the signal light 22 transmitted through the PC fiber 10.
- Signal light 22 in the atmosphere incident angle 0 [°] to PC fin 10, incident angle 0, [0] for signal light 22 in PC fin 10.
- the outer diameter D [zm] of the PC fiber 10 the core diameter a [/ m] of the PC fiber 10, the refractive index n of the light in the atmosphere, the refractive index of the light in the sealing portion 15 n, and fiber longitudinal length L Im of the sealing portion 1 5.
- ⁇ ⁇ m The length L of the sealing portion 15 indicates a section where the pores 12a, 12a, ... of the cladding 12 are sealed from the connection end of the syrup Fino 10 Shall be assumed. That is, if at least one of the pores 12 a, 12 a,... Of the clad 12 is sealed, the section is included in the sealing portion 15.
- the signal light 22 condensed by the light condensing device 21 is incident on the PC fiber 10 in the atmosphere at an incident angle of 0, and is incident on the PC fino 10 in the sealing portion 15 at an incident angle of 0. Go ahead
- Equation (1) holds.
- n ′ is the refractive index of light in the atmosphere
- n ′ 1, and the incident angle 6> ′ of the signal light 22 in the sealing portion 15 is expressed by the following equation (2).
- ⁇ ' sin- 1 (sin ⁇ / n) (2)
- the signal light 22 travels by a length L in the longitudinal direction of the fiber while traveling in the sealing portion 15 of the PC fiber 10 in the diameter direction (D + a) / 2 in the sealing direction. The relationship is established.
- the length from the point where light is once focused to the point where the light is spread to the core diameter is set as the maximum value of L ⁇ 0 .
- the inventors of the present invention have conducted trial and error studies on the length L of the sealing portion 15 that can process the pores 12 a of the cladding 12 with good reproducibility.
- the value is preferably set to about 10 m.
- the incident signal light 2 2 passes through the sealing portion 15 to ensure the pores 1 2 a, 1 5 of the cladding 1 2
- FIG. 3 shows an optical transmission device 30 according to the second embodiment.
- This optical transmission device 30 is configured using the same PC fiber 10 as in the first embodiment.
- the structure of the sealing portion 15 of the PC fiber 10 is the same as that of the first embodiment.
- the connection end of the PC fino 10 that seals the pores 12a is connected to the semiconductor laser (light source device) 31, and the signal light 32 output from the semiconductor laser 31 is transmitted to the PC fiber.
- An optical transmission device 30 that propagates by 10 is configured.
- the conditions for setting the length L of the sealing portion 15 in the fiber longitudinal direction will be described below.
- the emission angle of the signal light 32 into the PC fiber 10 in the atmosphere is 0 [°]
- the incident angle of the signal light 32 in the PC fiber 10 is 0, [. ]
- the light travels through the sealing portion 15 of the PC fiber 10 at the incident angle S, so that the relationship of the formula (6) is established.
- n '-sin0 n-sin0' (6)
- n is the refractive index of light in the atmosphere
- n ′ 1, and the incident angle 6> ′ of the signal light 22 in the sealing Q portion 15 is expressed by the following equation (7). .
- the circumferential diameter r of the signal light 32 in the circumferential direction at the end face of the PC fiber 10 is expressed by the following equation (8).
- the circumferential radius R of the signal light 32 at the interface between the core 5 of the PC fiber 10 and the core 5 is expressed by the following equation (9).
- the present inventor described the reproducibility of the pores 12 a of the clad 12 As a result of studying the length L of the sealing portion 15 that can be processed by trial and error, the lower limit value of the length L of the sealing portion 15 is preferably set to about 10 / m.
- the signal light 32 output from the semiconductor laser 31 and incident on the PC fiber 10 passes through the sealing portion 15 and is surely formed in the pores 12 a of the cladding 12. , 1 2a,- ⁇ ⁇ ⁇ In order to reach total reflection, the condition of equation (1 2) must be satisfied.
- the length L of the sealing part 15 is (1 If the value is set within the range that satisfies the condition of the expression 2), efficient optical transmission can be achieved without the signal light 32 leaking out of the PC finno I0 and causing a connection loss.
- the present invention is useful for an optical transmission device.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/553,842 US7292761B2 (en) | 2003-04-25 | 2004-04-16 | Optical transmission device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-122532 | 2003-04-25 | ||
JP2003122532A JP2004325948A (ja) | 2003-04-25 | 2003-04-25 | 光伝送装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004097471A1 true WO2004097471A1 (ja) | 2004-11-11 |
Family
ID=33410083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/005526 WO2004097471A1 (ja) | 2003-04-25 | 2004-04-16 | 光伝送装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7292761B2 (ja) |
JP (1) | JP2004325948A (ja) |
WO (1) | WO2004097471A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007272053A (ja) * | 2006-03-31 | 2007-10-18 | Furukawa Electric Co Ltd:The | 空孔付光ファイバの端部構造 |
JP2007310135A (ja) * | 2006-05-18 | 2007-11-29 | Imra America Inc | 大きな漏れチャンネルを持つファイバとロッド中のシングルモード伝搬 |
JP4664271B2 (ja) * | 2006-12-18 | 2011-04-06 | 三菱電線工業株式会社 | 光ファイバ及びその製造方法 |
JP2008242012A (ja) | 2007-03-27 | 2008-10-09 | Mitsubishi Cable Ind Ltd | レーザーガイド用光ファイバ及びそれを備えたレーザーガイド |
CN101571611B (zh) * | 2009-06-05 | 2011-05-18 | 阮双琛 | 光子晶体光纤的全光纤耦合实现装置及方法 |
US8422024B2 (en) | 2011-06-01 | 2013-04-16 | Honeywell International Inc. | High performance hollow-core optical-fiber filter for optical rotation sensing |
JP5859806B2 (ja) * | 2011-10-25 | 2016-02-16 | 三菱電線工業株式会社 | 光ファイバの端面処理方法及び端面処理された光ファイバ |
US9252559B2 (en) | 2012-07-10 | 2016-02-02 | Honeywell International Inc. | Narrow bandwidth reflectors for reducing stimulated Brillouin scattering in optical cavities |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288967A (ja) * | 1992-04-06 | 1993-11-05 | Showa Electric Wire & Cable Co Ltd | レーザ入力用光ファイバ |
JPH08220378A (ja) * | 1995-02-16 | 1996-08-30 | Furukawa Electric Co Ltd:The | レンズ付きファイバ |
JP2002323625A (ja) * | 2001-04-25 | 2002-11-08 | Sumitomo Electric Ind Ltd | 光ファイバの端面部構造および光ファイバ |
-
2003
- 2003-04-25 JP JP2003122532A patent/JP2004325948A/ja active Pending
-
2004
- 2004-04-16 WO PCT/JP2004/005526 patent/WO2004097471A1/ja active Application Filing
- 2004-04-16 US US10/553,842 patent/US7292761B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288967A (ja) * | 1992-04-06 | 1993-11-05 | Showa Electric Wire & Cable Co Ltd | レーザ入力用光ファイバ |
JPH08220378A (ja) * | 1995-02-16 | 1996-08-30 | Furukawa Electric Co Ltd:The | レンズ付きファイバ |
JP2002323625A (ja) * | 2001-04-25 | 2002-11-08 | Sumitomo Electric Ind Ltd | 光ファイバの端面部構造および光ファイバ |
Also Published As
Publication number | Publication date |
---|---|
US7292761B2 (en) | 2007-11-06 |
US20070041689A1 (en) | 2007-02-22 |
JP2004325948A (ja) | 2004-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11960119B2 (en) | Optical waveguide adapter assembly | |
US8059930B2 (en) | Optical fiber and method for fabricating the same | |
CN103229370B (zh) | 光纤维激光器 | |
US20080159702A1 (en) | Hermetically sealed optical fibre with voids or holes, method of its production, and its use | |
JP5786143B2 (ja) | ファイバー部品及びレーザ装置 | |
US20090092358A1 (en) | Light input/output terminal module of the optical components and beam converting apparatus | |
JP4801259B2 (ja) | 管に収容されたブラッグ回折格子を形成する方法および装置 | |
JP6921021B2 (ja) | 光システムとともに用いられるクラッドモードストリッパー及び同クラッドモードストリッパーを形成する方法 | |
WO2014002715A1 (ja) | 光ファイバおよび光ケーブル | |
WO2004097471A1 (ja) | 光伝送装置 | |
JP2006337550A (ja) | 光結合器 | |
WO2010067510A1 (ja) | 光ファイバ集光器、光増幅器及びファイバレーザ装置 | |
US10833470B2 (en) | Optical fiber and fiber laser | |
US20040008955A1 (en) | Methods of processing of air-clad and photonic-crystal fibers | |
JP2009175271A (ja) | 光ファイバ端部形状及び光ファイバ端部処理方法 | |
US8611708B2 (en) | Optical apparatus having improved resistance to thermal damage | |
JP2016090614A (ja) | 光学装置 | |
US20030231845A1 (en) | Methods of processing of air-clad and photonic-crystal fibers | |
JP2006038958A (ja) | 集光素子、その製造方法、光電気配線基板およびその製造方法 | |
JP3921556B2 (ja) | 光ファイバ端面のマイクロレンズの形成方法 | |
JP2010032650A (ja) | 活線検出装置 | |
Li et al. | Spiral optical delay lines in silicon-on-insulator | |
JP2006010961A (ja) | フォトニッククリスタルファイバおよびレーザ加工機 | |
JP2009237374A (ja) | 光ファイバ部品およびこの光ファイバ部品を用いた光モジュール | |
JP2004170741A (ja) | レーザ光伝達用光ファイバーおよびレーザ光伝達装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007041689 Country of ref document: US Ref document number: 10553842 Country of ref document: US |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTIFICATION OF LOSS OF RIGHTS ACCORDING TO RULE 69(1) EPC (1205A SENT ON 09-06-06) |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 10553842 Country of ref document: US |