KR970028617A - All Fiber Polarization Scatter Meter - Google Patents

All Fiber Polarization Scatter Meter Download PDF

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Publication number
KR970028617A
KR970028617A KR1019950039790A KR19950039790A KR970028617A KR 970028617 A KR970028617 A KR 970028617A KR 1019950039790 A KR1019950039790 A KR 1019950039790A KR 19950039790 A KR19950039790 A KR 19950039790A KR 970028617 A KR970028617 A KR 970028617A
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South Korea
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optical
light
optical fiber
path difference
generating means
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KR1019950039790A
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Korean (ko)
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KR0154619B1 (en
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김향균
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양승택
한국전자통신연구원
이준
한국전기통신공사
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Priority to KR1019950039790A priority Critical patent/KR0154619B1/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3181Reflectometers dealing with polarisation

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Lasers (AREA)

Abstract

본 발명은 전 광섬유 편광모드 분산 측정기에 관한 것으로, 각 부분이 광섬유로 융착 접속되어 있는 전 광섬유 편광모드 분산 측정기를 제공하기 위하여, 광 발생 수단(24); 제1,2,3,4광섬유(25,22,29,31); 상기 광원발생 수단(24)으로 입력되는 광을 차단하는 아이솔레이터(26); 상기 광발생 수단(24)으로부터 입력되는 입사광을 서로 수직한 성분으로 분할하거나 반사광을 결합하는 편극 광분할 수단(27); 경로차를 발생하는 제1,2경로차 발생 수단(23,30); 입력받은 광신호의 편광에 대하여 수직된 편광의 반사광을 출력하는 제1,2패러데이 회전거울(21,28); 편광모드 분산에 의한 광경로 차를 유도하는 측정소자(32); 광신호를 입력받아 간섭신호로 변환하는 편극기(33); 및 광세기를 검출하는 광세기 측정기(34)를 구비하여 접속 손실이 적고, 외부의 진동등에 대해서 안정하며, 광섬유의 편광섭동에 전혀 영향받지 않는 효과가 있다.The present invention relates to an all-optical polarization mode dispersion meter, comprising: light generating means (24) to provide an all-fiber polarization mode dispersion meter in which each part is fusion-spliced with an optical fiber; First, second, third, and fourth optical fibers 25,22,29,31; An isolator 26 for blocking light input to the light source generating means 24; Polarized light splitting means (27) for dividing incident light input from said light generating means (24) into components perpendicular to each other or combining reflected light; First and second path difference generating means (23,30) for generating a path difference; First and second Faraday rotating mirrors 21 and 28 which output reflected light having polarization perpendicular to the polarization of the received optical signal; A measuring element 32 for inducing optical path differences due to polarization mode dispersion; A polarizer 33 which receives an optical signal and converts it into an interference signal; And an optical intensity meter 34 for detecting the light intensity, which has a low connection loss, is stable against external vibration, and the like, and has no effect on the polarization perturbation of the optical fiber.

Description

전 광섬유 편광모드 분산 측정기All Fiber Polarization Scatter Meter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 전 광섬유 편광모드 분산 측정기.2 is a full-fiber polarization mode dispersion meter according to the present invention.

Claims (6)

광신호를 발생하는 광 발생 수단(24); 상기 광 발생 수단(24)에 일측이 연결되어 광신호를 입력받는 제1광섬유(25); 상기 제1광섬유(25) 중의 소정의 위치에 연결되어 상기 광원 발생 수단(24)으로 입력되는 광을 차단하는 아이솔레이터(26); 상기 제1광섬유(25)의 타측에 연결되어 상기 광 발생 수단(24)으로부터 입력되는 입사광을 서로 수직한 성분으로 분할하거나 반사광을 결합하는 편극 광분할 수단(Polarization beam splitter)(27); 상기 편극 광분할 수단(27)에 일측이 연결되어 수직 분할된 하나의 광을 입력받는 제2광섬유(22); 상기 제2광섬유(22) 중의 소정의 위치에 연결되어 경로차를 발생하는 제1경로차 발생 수단(23); 상기 편극 광분할 수단(27)에 일측이 연결되어 수직 분할된 타 광을 입력받는 제3광섬유(29); 상기 제3광섬유(29) 중의 소정의 위치에 연결되어 경로차를 발생하는 제2경로차 발생 수단(30); 상기 제2광섬유(22)의 타측에 연결되어 입력받은 광신호의 편광에 대하여 수직된 편상의 반사광을 상기 제2광섬유(22)를 통하여 상기 편극 광분할 수단(27)으로 출력하는 제1패러데이 회전 거울(Faraday Rotating Mirror) (28); 상기 편극 광분할 수단(27)에 일측이 연결되어 입력받은 광신호의 편광에 대하여 수직된 편광의 반사광을 상기 제3광섬유(29)를 통하여 상기 편극 광분할수단(27)으로 출력되는 제2패러데이 회전 거울울(Faraday Rotating Mirror) (28); 상기 편극 광분할 수단(27)에 일측이 연결되어결합된 반사광을 입력받는 제4광섬유(31); 상기 제4광섬유(31)의 타측에 연결되어 편광모드 분산에 의한 광경로차를 유도하는 측정소자(32); 상기 측정소자(32)를 통과한 광신호를 입력받아 간섭신호로 변환하는 편극기(33); 및 상기 편극기(33)에 연결되어 광세기를 검출하는 광세기 측정기(34)를 구비하는 것을 특징으로 하는 전 광섬유 편광모드 분산 측정기.Light generating means 24 for generating an optical signal; A first optical fiber 25 connected to one side of the light generating means 24 to receive an optical signal; An isolator (26) connected to a predetermined position in the first optical fiber (25) to block light input to the light source generating means (24); Polarization beam splitter (27) connected to the other side of the first optical fiber (25) for splitting incident light input from the light generating means (24) into vertical components or combining reflected light; A second optical fiber 22 having one side connected to the polarized light splitter 27 and receiving one vertically divided light; First path difference generating means (23) connected to a predetermined position in the second optical fiber (22) to generate a path difference; A third optical fiber 29 having one side connected to the polarized light splitting means 27 to receive other vertically divided light; Second path difference generating means (30) connected to a predetermined position in the third optical fiber (29) to generate a path difference; First Faraday rotation, which is connected to the other side of the second optical fiber 22 and outputs reflected light having a vertical polarization to the polarization of the input optical signal to the polarized light splitting means 27 through the second optical fiber 22. Faraday Rotating Mirror (28); The second Faraday, which one side is connected to the polarized light splitting means 27 and outputs reflected light of polarized light perpendicular to the polarized light of the input optical signal to the polarized light splitting means 27 through the third optical fiber 29. Faraday Rotating Mirror (28); A fourth optical fiber 31 having one side connected to the polarized light splitter 27 and receiving the reflected light coupled thereto; A measuring element 32 connected to the other side of the fourth optical fiber 31 to induce an optical path difference by polarization mode dispersion; A polarizer 33 which receives an optical signal passing through the measuring element 32 and converts the optical signal into an interference signal; And a light intensity meter (34) connected to the polarizer (33) to detect light intensity. 제1항에 있어서, 상기 광 발생 수단(24)은, 발광다이오드(LED) 또는 에르븀 첨가 광증폭기인 것을 특징으로 하는 전 광섬유 편광모드 분산 측정기.The all-optical polarization mode dispersion meter according to claim 1, wherein the light generating means (24) is a light emitting diode (LED) or an erbium-added optical amplifier. 제1항에 있어서, 상기 제1경로차 발생 수단(23)은, 상기 제2광섬유(22)의 길이 변화로 광경로 차를 발생하도록 구성하고, 상기 제2경로차 발생 수단(30)은, 상기 제3광섬유(29)의 길이 변화로 광경로 차를 발생하도록 구성한 것임을 특징으로 하는 전 광섬유 편광모드 분산 측정기.The method of claim 1, wherein the first path difference generating means 23 is configured to generate the optical path difference by the change in the length of the second optical fiber 22, the second path difference generating means 30, All-optical polarization mode dispersion meter, characterized in that configured to generate the optical path difference by the change in the length of the third optical fiber (29). 제3항에 있어서, 상기 각 경로차 발생 수단(23,30)은, 원통형 압전소자(PZT)(23)로 구성한 것임을 특징으로 하는 전 광섬유 편광모드 분산 측정기.4. The all-optical polarization mode dispersion meter according to claim 3, wherein the path difference generating means (23, 30) are constituted by cylindrical piezoelectric elements (PZT) (23). 제3항에 있어서, 상기 경로차 발생 수단(23,30)은, 기계적으로 광섬유를 압축하거나 인장하도록 구성한 것임을 특징으로 하는 전 광섬유 편광모드 분산 측정기.The all-optical polarization mode dispersion meter according to claim 3, wherein the path difference generating means (23, 30) is configured to mechanically compress or stretch the optical fiber. 제1항에 있어서, 상기 제1경로차 발생 수단(23)은, 제2광섬유(22)의 소정의 위치에 자유 공간을 설정하고, 상기 제2경로차 발생 수단(29)은, 상기 제3광섬유(29)의 소정의 위치에 자유 공간을 설정한 것임을 특징으로 하는 전 광섬유 편광모드 분산 측정기.The said 1st path difference generation means 23 sets a free space in the predetermined position of the 2nd optical fiber 22, The said 2nd path difference generation means 29 is said 3rd. All optical fiber polarization mode dispersion measuring instrument characterized in that the free space is set at a predetermined position of the optical fiber (29). ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019950039790A 1995-11-04 1995-11-04 All optical fiber polarization mode distribution tester KR0154619B1 (en)

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KR1019950039790A KR0154619B1 (en) 1995-11-04 1995-11-04 All optical fiber polarization mode distribution tester

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100444902B1 (en) * 2001-12-19 2004-08-21 한국전력공사 Monitoring System of Environment by Detecting the Birefringence Changes of the Optical Fiber
KR100950150B1 (en) * 2003-06-13 2010-03-30 주식회사 케이티 Optical signal to noise ratio measurement apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100444902B1 (en) * 2001-12-19 2004-08-21 한국전력공사 Monitoring System of Environment by Detecting the Birefringence Changes of the Optical Fiber
KR100950150B1 (en) * 2003-06-13 2010-03-30 주식회사 케이티 Optical signal to noise ratio measurement apparatus and method

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KR0154619B1 (en) 1998-12-15

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