JPS5456462A - Optical isolator - Google Patents

Optical isolator

Info

Publication number
JPS5456462A
JPS5456462A JP12233177A JP12233177A JPS5456462A JP S5456462 A JPS5456462 A JP S5456462A JP 12233177 A JP12233177 A JP 12233177A JP 12233177 A JP12233177 A JP 12233177A JP S5456462 A JPS5456462 A JP S5456462A
Authority
JP
Japan
Prior art keywords
yoke
ferromagnetic material
magnetic path
magnet
faraday rotation
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.)
Pending
Application number
JP12233177A
Other languages
Japanese (ja)
Inventor
Shintaro Hayashi
Hidetoshi Iwamura
Yasutaka Suemune
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 JP12233177A priority Critical patent/JPS5456462A/en
Publication of JPS5456462A publication Critical patent/JPS5456462A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To achieve smaller size, lighter weight and higher performance by using a permanent magnet for magnetization of a ferromagnetic material for Faraday rotation and magnetically connecting the same with a yoke thereby forming the closed magnetic path of bottomed cylinder form.
CONSTITUTION: A ferromagnetic material 4 of column form for Faraday rotation are so provided as to contact the end parts of columnar form parts 16, 17. Hence, the magnetic flux is transmitted from a magnet 14 via the central columnar form part 17 of the yoke 13 to the ferromagnetic material 4 to saturation-magnetize said material and returns via the yoke 12 to the magnet 14 thereby forming a closed magnetic path. At this time, the thickness and value of magnetization of the magnetic material 4 are so selected as to give Faraday rotation of 45°. Since the Faraday rotor by this constitution forms a closed magnetic path, it is magnetically stable and the optical isolator of small size, light weight and high performance may be obtained
COPYRIGHT: (C)1979,JPO&Japio
JP12233177A 1977-10-14 1977-10-14 Optical isolator Pending JPS5456462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12233177A JPS5456462A (en) 1977-10-14 1977-10-14 Optical isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12233177A JPS5456462A (en) 1977-10-14 1977-10-14 Optical isolator

Publications (1)

Publication Number Publication Date
JPS5456462A true JPS5456462A (en) 1979-05-07

Family

ID=14833314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12233177A Pending JPS5456462A (en) 1977-10-14 1977-10-14 Optical isolator

Country Status (1)

Country Link
JP (1) JPS5456462A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185013A (en) * 1981-05-08 1982-11-15 Hoya Corp Optical isolator
JPS58219523A (en) * 1982-06-15 1983-12-21 Ko Taketomi Method for controlling and stabilizing quantity of transmitted light by using double reflection in magnetic field of magnetic fluid, optical memory and its device
US4475359A (en) * 1981-10-27 1984-10-09 Tokyo Shibaura Denki Kabushiki Kaisha Air conditioning apparatus
JPS61114420U (en) * 1984-12-27 1986-07-19
JPS61114421U (en) * 1984-12-27 1986-07-19
JPS61116321U (en) * 1984-12-28 1986-07-23

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185013A (en) * 1981-05-08 1982-11-15 Hoya Corp Optical isolator
US4475359A (en) * 1981-10-27 1984-10-09 Tokyo Shibaura Denki Kabushiki Kaisha Air conditioning apparatus
JPS58219523A (en) * 1982-06-15 1983-12-21 Ko Taketomi Method for controlling and stabilizing quantity of transmitted light by using double reflection in magnetic field of magnetic fluid, optical memory and its device
JPS61114420U (en) * 1984-12-27 1986-07-19
JPS61114421U (en) * 1984-12-27 1986-07-19
JPS61116321U (en) * 1984-12-28 1986-07-23
JPH0123127Y2 (en) * 1984-12-28 1989-07-17

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