KR101137229B1 - Contactless optical fiber interconnecting apparatus - Google Patents

Contactless optical fiber interconnecting apparatus Download PDF

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Publication number
KR101137229B1
KR101137229B1 KR1020110063634A KR20110063634A KR101137229B1 KR 101137229 B1 KR101137229 B1 KR 101137229B1 KR 1020110063634 A KR1020110063634 A KR 1020110063634A KR 20110063634 A KR20110063634 A KR 20110063634A KR 101137229 B1 KR101137229 B1 KR 101137229B1
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South Korea
Prior art keywords
lens
optical fiber
ferrule
hole
contact
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KR1020110063634A
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Korean (ko)
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이수영
권오덕
손근식
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(주)포스텍
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    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • 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
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2848—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, e.g. lenses, holograms
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861—Adhesive bonding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE: A contactless optical fiber connecting device is provided to stably transmit signals regardless of dusts and abnormal materials by diffusing beam through a lens. CONSTITUTION: A first ferrule(220) forms a through-hole passing through a body, and a first optical fiber is inserted into the through-hole. The first optic(230) is separated from the front end of the first ferrule. A second ferrule(250) is formed with the through-hole, and a second optical fiber is inserted into the through-hole. A second lens(240) is separated from the front end of the second ferrule and faces to the first lens with being separated from each other. The external diameter of a diffusing part is enlarged gradually toward to the front end of the first optical fiber or the second optical fiber.

Description

비접촉식 광섬유 연결장치{Contactless optical fiber interconnecting apparatus}Contactless optical fiber interconnecting apparatus

본 발명은 광섬유 연결장치에 관한 것으로, 특히 광섬유 연결시 렌즈를 이용하여 비접촉방식으로 광신호를 전달하는 비접촉식 광섬유 연결장치에 관한 것이다.
The present invention relates to an optical fiber connection device, and more particularly, to a non-contact optical fiber connection device for transmitting an optical signal in a non-contact manner by using a lens when the optical fiber connection.

각종 통신신호를 에러없이 장거리 전송하기 위하여 광섬유가 많이 사용되고 있는데, 이러한 광섬유를 연결하는 방식으로 광커넥터가 사용되고 있다.Optical fibers are widely used to transmit various communication signals over long distances without errors, and optical connectors are used to connect such optical fibers.

이러한 일반적인 광 커넥터는 도1에 도시한 바와같이, 제1페룰(110)을 관통시켜 제1광섬유(111)를 삽입하고, 또한, 제2페룰(120)에는 제2광섬유(121)를 관통하여 삽입한 다음 제1페룰(110)의 선단과 제2페룰(120)의 선단이 맞닿아 고정되도록 그 연결부위 외측으로 슬리브(100)가 장착된다.As shown in FIG. 1, the general optical connector penetrates the first ferrule 110 to insert the first optical fiber 111, and the second ferrule 120 penetrates the second optical fiber 121. After insertion, the sleeve 100 is mounted to the outside of the connection portion such that the tip of the first ferrule 110 and the tip of the second ferrule 120 abut and are fixed.

또한, 제1페룰(110)과 제2페룰(120)의 접촉력을 좋게 하기 위해, 제1페룰(110)과 제2페룰(120)의 선단은 곡선으로 형성됨으로써 그 곡선에 의한 탄성압력이 작용함으로써 정렬상태가 고정된다.In addition, in order to improve the contact force between the first ferrule 110 and the second ferrule 120, the front ends of the first ferrule 110 and the second ferrule 120 are formed in a curve, so that the elastic pressure due to the curve acts. By doing so, the alignment is fixed.

그런데, 이러한 종래의 광 커넥터는 페룰을 청소하는 과정중에 광섬유에 손상이 발생하게 되면, 손상된 광섬유에 의해 광손실이 발생하고, 또한 페룰이 접촉하는 과정중에 페룰이 손상됨으로써 페룰로부터 떨어져 나온 파편이나 먼지에 의해 광신호의 전송이 방해되어 신호 전달의 오류가 발생하게 되는 문제점이 있다.
However, in the conventional optical connector, when the optical fiber is damaged during the process of cleaning the ferrule, optical loss is generated by the damaged optical fiber, and the ferrule is damaged during the contact of the ferrule, and the debris or dust that is separated from the ferrule is lost. There is a problem that the transmission of the optical signal is disturbed by the error of signal transmission.

본 발명은 종래의 이러한 문제점을 해결하기 위하여, 페룰들의 선단에 렌즈를 구비하고, 그 렌즈들을 서로 이격시킴으로써 렌즈를 이용하여 신호의 전달이 이루어지도록 함으로써 비접촉식으로 광섬유를 정렬하여 종래의 문제점을 해결하도록 한 비접촉식 광섬유 연결장치를 제공하는데 그 목적이 있다.
The present invention is to solve the conventional problem by providing a lens at the front end of the ferrules, and by transmitting the signal by using the lens by separating the lenses from each other to solve the conventional problem by solving the conventional problem. It is an object to provide a contactless optical fiber connection device.

상기의 목적을 달성하기 위한 본 발명의 비접촉식 광섬유 연결장치는,Non-contact optical fiber connection device of the present invention for achieving the above object,

몸체를 직선으로 관통하는 관통공이 형성되고, 그 관통공에 제1광섬유가 삽입된 제1페룰;A first ferrule having a through-hole penetrating the body in a straight line and having a first optical fiber inserted therein;

상기 제1페룰의 선단에서 이격되어 구비된 제1렌즈;A first lens spaced apart from the front end of the first ferrule;

몸체를 직선으로 관통하는 관통공이 형성되고, 그 관통공에 제2광섬유가 삽입된 제2페룰;A second ferrule having a through hole penetrating the body in a straight line and having a second optical fiber inserted therein;

상기 제2페룰의 선단에서 이격되어 구비되며, 상기 제1렌즈와 마주보면서 서로 이격되어 위치하는 제2렌즈;로 구성된다.
And a second lens spaced apart from the front end of the second ferrule and spaced apart from each other while facing the first lens.

이러한 본 발명에 의하면, 광섬유가 직접 접촉하지 않은 상태에서 신호의 전달이 이루어지는 구조이므로 광섬유의 손상이 발생하지 않고, 또한 페룰도 비접촉식으로 설치되므로 이 또한 손상이 발생하지 않아 신호의 전송 오류가 발생하지 않는다.According to the present invention, since the transmission of the signal in a state in which the optical fiber is not in direct contact with the optical fiber does not cause damage, and also because the ferrule is installed in a non-contact, this also does not cause damage, so no signal transmission error occurs Do not.

이로인해, 신호 전송의 신뢰성이 확보되고, 또한 렌즈에 의해 빔이 확산되어 전달되므로 작은 먼지나 이물질이 있더라도 안정적인 신호의 전달이 이루어지는 장점이 있는 것이다.
Due to this, the reliability of signal transmission is secured, and since the beam is spread and transmitted by the lens, there is an advantage that stable signal transmission is achieved even with small dust or foreign matter.

도1은 일반적인 접촉식 광 커넥터의 구조를 보인 도.
도2는 본 발명에 의한 비접촉식 광섬유 연결장치의 구조를 보인 도.
도3는 본 발명의 다른 형태를 보인 도.
도4는 본 발명에서 적용되는 구면 렌즈와 비구면 렌즈의 빔 전달 형태를 보인 도.
도5는 본 발명의 또 다른 형태를 보인 도.1 shows a structure of a general contact optical connector.
Figure 2 is a view showing the structure of a non-contact optical fiber connection device according to the present invention.
Figure 3 shows another form of the present invention.
Figure 4 is a view showing a beam transmission form of the spherical lens and the aspherical lens applied in the present invention.
Figure 5 shows another form of the present invention.

이와같이 구성된 본 발명을 첨부한 도면을 참조하여 상세히 설명한다.The present invention configured as described above will be described in detail with reference to the accompanying drawings.

도2는 본 발명의 비접촉식 광섬유 연결장치를 보인 도로서, 제1페룰(220)은 몸체를 관통하는 관통공(221)이 형성되어 있고, 상기 관통공(221)으로 제1광섬유(210)의 코어(211)가 제1페룰(220)의 선단까지 삽입된다.Figure 2 is a view showing a non-contact optical fiber connection device of the present invention, the first ferrule 220 is formed with a through hole 221 penetrating through the body, the through hole 221 of the first optical fiber 210 The core 211 is inserted to the tip of the first ferrule 220.

상기 제1페룰(220)의 선단에는 초점거리(d1)만큼 이격된 거리에 구(Ball) 형태의 제1렌즈(230)가 위치하고, 상기 제1렌즈(230)의 선단으로부터 평행거리(d2)만큼 이격된 거리에 제2렌즈(240)가 서로 마주보면서 위치한다.A first lens 230 having a ball shape is positioned at a distance spaced apart by a focal length d1 from the front end of the first ferrule 220, and a parallel distance d2 from the front end of the first lens 230. The second lens 240 is positioned to face each other at a distance separated by each other.

또한, 상기 제2렌즈(240)의 후단으로부터 초점거리(d3)만큼 이격된 거리에 제2페룰(250)이 위치하고, 제2페룰(250)을 관통하여 형성된 관통공(251)에 제1광섬유(260)의 코어(261)가 제1페룰(250)의 선단까지 삽입된다.In addition, the first optical fiber is located in the through-hole 251 formed through the second ferrule 250 is located at a distance spaced from the rear end of the second lens 240 by the focal length d3. The core 261 of 260 is inserted to the tip of the first ferrule 250.

그리고, 제1광섬유(210)의 선단부위, 제1페룰(220), 제1렌즈(230), 제2렌즈(240), 제2페룰(250), 제2광섬유(260)의 선단부위를 외부로 보호할 수 있도록 하우징(200)이 씌워지는데, 도2에서는 하우징(200)의 구조가 본 발명의 요지가 아니므로 개략적으로 도시하였지만 내장된 구조물을 고정시키고, 외부의 충격이나 절단, 그리고 방수 등으로부터 내장된 구조물을 보호하기 위한 구조를 가지는 것이 바람직하다.The tip portion of the first optical fiber 210, the first ferrule 220, the first lens 230, the second lens 240, the second ferrule 250, and the second optical fiber 260 may be formed. The housing 200 is covered to protect the outside. In FIG. 2, the structure of the housing 200 is not the gist of the present invention, but is schematically illustrated. It is desirable to have a structure for protecting the built-in structure from the back.

따라서, 제1광섬유(210)를 통해 전송되어진 광신호는 제1페룰(220)의 선단에서 출사되어 초점거리(d1)만큼 이격된 제1렌즈(230)에 초점이 맞취져면서 입사되고, 제1렌즈(230)에 의해 확산된 빔(B)은 평행거리(d2)만큼 이동하여 제2렌즈(240)로 입사된다.Accordingly, the optical signal transmitted through the first optical fiber 210 is incident on the first lens 230, which is emitted from the tip of the first ferrule 220 and is focused by the focal length d1, and is focused. The beam B diffused by the first lens 230 moves by the parallel distance d2 and is incident to the second lens 240.

상기 제2렌즈(240)로 입사된 빔은 초점거리(d3)에 의해 초점이 맞취져 출사된 다음 제2페룰(250)에 장착된 제2광섬유(260)로 입사되어 비접촉식으로 광신호의 전송이 이루어진다.The beam incident on the second lens 240 is focused by the focal length d3 and then emitted, and then is incident on the second optical fiber 260 mounted on the second ferrule 250 to transmit an optical signal in a non-contact manner. This is done.

제1렌즈(230)에 의해 확산된 빔(B)에 의해 제1렌즈(230)와 제2렌즈(250)의 사이에 조그마한 이물질이 있더라도 제2렌즈(240)에 신호의 전송이 이루어질 수 있으므로 신호전달의 오류가 발생하지 않는다.Even though there is a small foreign material between the first lens 230 and the second lens 250 by the beam B diffused by the first lens 230, a signal may be transmitted to the second lens 240. There is no error in signal transmission.

한편, 제1페룰(220)과 제1렌즈(230)를 초점거리(d1)만큼 이격된 위치에서 고정하는 방법으로는 제1페룰(220)과 제1렌즈(230) 사이에 에폭시를 채워 접합 및 초점거리(d1)의 유지가 가능하도록 한다.Meanwhile, a method of fixing the first ferrule 220 and the first lens 230 at a position spaced apart by the focal length d1 may be performed by filling an epoxy between the first ferrule 220 and the first lens 230. And the focal length d1 can be maintained.

물론, 제1렌즈(240)와 제2페룰(250)도 동일한 방식을 사용한다.
Of course, the first lens 240 and the second ferrule 250 use the same method.

도3은 반 원기둥 형태의 제3렌즈(231)와 제4렌즈(241)가 장착된 형태로서, 제3렌즈(231)와 제4렌즈(241)는 원 또는 타원의 단면을 갖는 기둥체가 길이방향으로 절반이 잘려진 상태의 렌즈로서 곡선의 외주면이 렌즈로 작용한다.3 is a shape in which a third cylindrical lens 231 and a fourth lens 241 are mounted in a semi-cylindrical shape. The lens is cut in half in the direction, and the outer peripheral surface of the curve acts as a lens.

이러한 구조는 제1페룰(220)의 전면에 제3렌즈(231)의 후면이 초점거리(d1)를 두고 설치된 형태로서 충전재인 에폭시에 의해 접합시 면접촉이 이루어지므로 광섬유(210)와의 정렬이 쉬워 정렬 오류가 감소되므로 광신호의 왜곡이 줄어들며, 부피가 감소되는 장점이 있다.This structure is a form in which the rear surface of the third lens 231 is installed at the front surface of the first ferrule 220 at a focal length d1, and the surface contact is made by bonding the epoxy with the filler, so that the alignment with the optical fiber 210 is improved. It is easy to reduce the alignment error, the distortion of the optical signal is reduced, there is an advantage that the volume is reduced.

또한, 제4렌즈(241)와 제2페룰(250)도 제1페룰(220) 및 제3렌즈(231)와 동일한 형태로 되어있다.In addition, the fourth lens 241 and the second ferrule 250 may have the same shape as the first ferrule 220 and the third lens 231.

이때, 도4(a)와 같이 제3렌즈(231)의 빔 출사부위가 구면(232)으로 형성된 경우 출사되는 빔(B)이 평행하게 전송되지 못하므로, (b)와 같이 비구면(233)으로 형성하면 빔이 평행하게 제4렌즈(241)로 전송될 수 있다.
In this case, when the beam exit portion of the third lens 231 is formed as the spherical surface 232 as shown in FIG. 4A, the beam B emitted is not transmitted in parallel. Aspheric surface 233 as shown in (b) of FIG. In this case, the beams may be transmitted to the fourth lens 241 in parallel.

도5는 본 발명에 의하여 제1광섬유(210)와 제1렌즈(231)와의 정렬시에 정렬이 틀어진 경우가 발생할 수 있는데, 이러한 정렬 오류를 보상하기 위하여 광섬유(210)의 코어(211) 전방부를 선단으로 갈수록 확산되도록 열에 의해 확산된 확산부(212)를 형성함으로써 정렬 오류가 발생하더라도 광신호를 제1렌즈(231)로 올바르게 전달할 수 있도록 한다.5 is a case where the alignment is misaligned when the first optical fiber 210 and the first lens 231 are aligned according to the present invention, in order to compensate for this misalignment in front of the core 211 of the optical fiber 210 By forming the diffusion part 212 diffused by heat so that the part is diffused toward the tip, even if an alignment error occurs, the optical signal can be correctly transmitted to the first lens 231.

물론, 제2광섬유(260)의 코어(261) 전방부도 확산부(262)를 형성함으로써 광 신호의 입사를 효율적으로 받아들일 수 있도록 한다.
Of course, the front portion of the core 261 of the second optical fiber 260 also forms the diffusion portion 262 so that the incident of the optical signal can be efficiently received.

200 : 하우징 210,260 : 광섬유
211,261 : 코어 212,262 : 확산부
220,250 : 페룰 221,251 : 관통공
230,231,240,241 : 렌즈
200: housing 210,260: optical fiber
211,261: core 212,262: diffusion
220,250: Ferrule 221,251: Through hole
230,231,240,241: Lens

Claims (5)

몸체를 직선으로 관통하는 관통공이 형성되고, 그 관통공에 제1광섬유가 삽입된 제1페룰;
상기 제1페룰의 선단에서 이격되어 구비된 제1렌즈;
몸체를 직선으로 관통하는 관통공이 형성되고, 그 관통공에 제2광섬유가 삽입된 제2페룰;
상기 제2페룰의 선단에서 이격되어 구비되며, 상기 제1렌즈와 마주보면서 서로 이격되어 위치하는 제2렌즈;로 구성되며,
상기 제1광섬유 또는 제2광섬유의 전방부는 선단으로 갈수록 외경이 커지는 확산부를 가지는 것을 특징으로 하는 비접촉식 광섬유 연결장치
A first ferrule having a through-hole penetrating the body in a straight line and having a first optical fiber inserted therein;
A first lens spaced apart from the front end of the first ferrule;
A second ferrule having a through hole penetrating the body in a straight line and having a second optical fiber inserted therein;
And a second lens spaced apart from the front end of the second ferrule and spaced apart from each other while facing the first lens.
Non-contact optical fiber connection device, characterized in that the front portion of the first optical fiber or the second optical fiber has a diffusion portion that increases in outer diameter toward the tip
제1항에 있어서, 상기 제1렌즈 또는 제2렌즈는 구형태 또는 반 원기둥 형태인 것을 특징으로 하는 비접촉식 광섬유 연결장치.
The contactless optical fiber connection device of claim 1, wherein the first lens or the second lens has a spherical shape or a semi-cylindrical shape.
제2항에 있어서, 상기 제1렌즈 또는 제2렌즈는 비구면으로 형성된 것을 특징으로 하는 비접촉식 광섬유 연결장치
The non-contact optical fiber connection device of claim 2, wherein the first lens or the second lens is formed as an aspherical surface.
삭제delete 제1항에 있어서, 제1페룰과 제1렌즈 또는 제2페룰과 제2렌즈의 이격거리는 광의 초점이 형성되는 거리인 것을 특징으로 하는 비접촉식 광섬유 연결장치.The non-contact optical fiber connecting device of claim 1, wherein the separation distance between the first ferrule and the first lens or the second ferrule and the second lens is a distance at which the focus of light is formed.
KR1020110063634A 2011-06-29 2011-06-29 Contactless optical fiber interconnecting apparatus KR101137229B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101480833B1 (en) * 2013-07-05 2015-01-13 국방과학연구소 Optical connector and method for manufacturing the connector
KR101585915B1 (en) * 2014-10-14 2016-01-15 한국산업기술대학교산학협력단 Ball lens and non-contact optical connector using it

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07181339A (en) * 1993-12-24 1995-07-21 Toshiba Corp Optical fiber connector
JPH08152581A (en) * 1994-11-29 1996-06-11 Nippon Telegr & Teleph Corp <Ntt> Collimator and collimator array
KR20030027781A (en) * 2001-09-27 2003-04-07 마츠시타 덴끼 산교 가부시키가이샤 Aspherical rod lens and method of manufacturing aspherical rod lens
JP2005326523A (en) 2004-05-13 2005-11-24 Yazaki Corp Optical coupling structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07181339A (en) * 1993-12-24 1995-07-21 Toshiba Corp Optical fiber connector
JPH08152581A (en) * 1994-11-29 1996-06-11 Nippon Telegr & Teleph Corp <Ntt> Collimator and collimator array
KR20030027781A (en) * 2001-09-27 2003-04-07 마츠시타 덴끼 산교 가부시키가이샤 Aspherical rod lens and method of manufacturing aspherical rod lens
JP2005326523A (en) 2004-05-13 2005-11-24 Yazaki Corp Optical coupling structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101480833B1 (en) * 2013-07-05 2015-01-13 국방과학연구소 Optical connector and method for manufacturing the connector
KR101585915B1 (en) * 2014-10-14 2016-01-15 한국산업기술대학교산학협력단 Ball lens and non-contact optical connector using it

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