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JPS5522729A - Photo isolator - Google Patents

Photo isolator

Info

Publication number
JPS5522729A
JPS5522729A JP9522178A JP9522178A JPS5522729A JP S5522729 A JPS5522729 A JP S5522729A JP 9522178 A JP9522178 A JP 9522178A JP 9522178 A JP9522178 A JP 9522178A JP S5522729 A JPS5522729 A JP S5522729A
Authority
JP
Japan
Prior art keywords
light
crystals
double refractive
magneto
fiber
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
Application number
JP9522178A
Other languages
Japanese (ja)
Other versions
JPS5828561B2 (en
Inventor
Takao Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP53095221A priority Critical patent/JPS5828561B2/en
Priority to US06/060,881 priority patent/US4239329A/en
Priority to DE2931474A priority patent/DE2931474C2/en
Priority to GB7927082A priority patent/GB2030316B/en
Priority to CA000333214A priority patent/CA1116906A/en
Priority to NLAANVRAGE7905972,A priority patent/NL181053C/en
Priority to FR7920039A priority patent/FR2432723A1/en
Publication of JPS5522729A publication Critical patent/JPS5522729A/en
Publication of JPS5828561B2 publication Critical patent/JPS5828561B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE: To obtain the extremely good photo isolator by selectively combining two or three flat plate form double refractive crystals as well as magneto-optic materials and crystals having rotatory polarization or onisotropy.
CONSTITUTION: A lens 10, flat plate form double refractive crystals 11, 12, magneto-optic material 13 and crystal 14 having rotatory polarization or anisotropy are provided to the optical guide consisting of optical fibers 8, 9. The double refractive crystals 11, 12 have the function of performing separation and synthesis of normal light and abnormal light and are so installed that their optical axes are within the same plane. The material 13 exhibits Faraday effect through magnetization from the outside and its length is so determined that the deflection directions of incident light and exit light vary by 45°. The length of the crystal 14 is also so determined similarly as to vary these by 45°. Such constitution allows even the mutually orthogonally intersecting different polarized light to be entered from the fiber 8 to 9 without any loss and prohibits the incidence from the fiber 9 to 8, hence the extremely good photo isolator may be realized.
COPYRIGHT: (C)1980,JPO&Japio
JP53095221A 1978-08-04 1978-08-04 optical isolator Expired JPS5828561B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP53095221A JPS5828561B2 (en) 1978-08-04 1978-08-04 optical isolator
US06/060,881 US4239329A (en) 1978-08-04 1979-07-26 Optical nonreciprocal device
DE2931474A DE2931474C2 (en) 1978-08-04 1979-08-02 Non-reciprocal optical device
GB7927082A GB2030316B (en) 1978-08-04 1979-08-03 Optical nonreciprocal device
CA000333214A CA1116906A (en) 1978-08-04 1979-08-03 Optical coupling nonreciprocal device
NLAANVRAGE7905972,A NL181053C (en) 1978-08-04 1979-08-03 OPTICAL, NON-RECIPROKE DEVICE FOR OPTICALLY COUPLING TWO OPPOSITE OPTICAL FIBERS.
FR7920039A FR2432723A1 (en) 1978-08-04 1979-08-03 NON-REFLECTIVE OPTICAL DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53095221A JPS5828561B2 (en) 1978-08-04 1978-08-04 optical isolator

Publications (2)

Publication Number Publication Date
JPS5522729A true JPS5522729A (en) 1980-02-18
JPS5828561B2 JPS5828561B2 (en) 1983-06-16

Family

ID=14131680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53095221A Expired JPS5828561B2 (en) 1978-08-04 1978-08-04 optical isolator

Country Status (1)

Country Link
JP (1) JPS5828561B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341442A (en) * 1979-03-06 1982-07-27 Max-Planck-Gesellschaft Zur Forderung D. Wissenschaften E. V. Fiber optical transmission filter with double-refraction element
JPS57185013A (en) * 1981-05-08 1982-11-15 Hoya Corp Optical isolator
JPS58116515A (en) * 1981-12-29 1983-07-11 Fujitsu Ltd optical isolator
JPS58135717U (en) * 1982-03-05 1983-09-12 富士通株式会社 optical isolator
JPH0451214A (en) * 1990-06-20 1992-02-19 Shinkosha:Kk Optical isolator
US5278853A (en) * 1991-05-28 1994-01-11 Mitsubishi Gas Chemical Co., Ltd. Optical isolator
EP0691563A2 (en) 1991-02-20 1996-01-10 Sumitomo Electric Industries, Ltd. Optical isolator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5643936B2 (en) 2011-06-29 2014-12-24 フルウチ化学株式会社 Collimator and optical isolator with collimator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53149046A (en) * 1977-05-31 1978-12-26 Nec Corp Optical isolator
JPS54147059A (en) * 1978-05-11 1979-11-16 Mitsubishi Electric Corp Optical device
JPS54159245A (en) * 1978-06-06 1979-12-15 Mitsubishi Electric Corp Optical device
JPS556326A (en) * 1978-06-27 1980-01-17 Matsushita Electric Ind Co Ltd Light isolator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53149046A (en) * 1977-05-31 1978-12-26 Nec Corp Optical isolator
JPS54147059A (en) * 1978-05-11 1979-11-16 Mitsubishi Electric Corp Optical device
JPS54159245A (en) * 1978-06-06 1979-12-15 Mitsubishi Electric Corp Optical device
JPS556326A (en) * 1978-06-27 1980-01-17 Matsushita Electric Ind Co Ltd Light isolator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341442A (en) * 1979-03-06 1982-07-27 Max-Planck-Gesellschaft Zur Forderung D. Wissenschaften E. V. Fiber optical transmission filter with double-refraction element
JPS57185013A (en) * 1981-05-08 1982-11-15 Hoya Corp Optical isolator
JPS58116515A (en) * 1981-12-29 1983-07-11 Fujitsu Ltd optical isolator
JPS6255766B2 (en) * 1981-12-29 1987-11-20 Fujitsu Ltd
JPS58135717U (en) * 1982-03-05 1983-09-12 富士通株式会社 optical isolator
JPH0451214A (en) * 1990-06-20 1992-02-19 Shinkosha:Kk Optical isolator
EP0691563A2 (en) 1991-02-20 1996-01-10 Sumitomo Electric Industries, Ltd. Optical isolator
US5278853A (en) * 1991-05-28 1994-01-11 Mitsubishi Gas Chemical Co., Ltd. Optical isolator

Also Published As

Publication number Publication date
JPS5828561B2 (en) 1983-06-16

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