JPH01255803A - Optical fixed attenuator - Google Patents

Optical fixed attenuator

Info

Publication number
JPH01255803A
JPH01255803A JP63083068A JP8306888A JPH01255803A JP H01255803 A JPH01255803 A JP H01255803A JP 63083068 A JP63083068 A JP 63083068A JP 8306888 A JP8306888 A JP 8306888A JP H01255803 A JPH01255803 A JP H01255803A
Authority
JP
Japan
Prior art keywords
optical
fixed attenuator
optical fiber
end
suppressed
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
JP63083068A
Inventor
Koji Matsumoto
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP63083068A priority Critical patent/JPH01255803A/en
Publication of JPH01255803A publication Critical patent/JPH01255803A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/25Preparing the ends of light guides for coupling, e.g. cutting
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/264Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • G02B6/266Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator

Abstract

PURPOSE:To suppress the deterioration in transmission characteristic by forming a reflecting film to the clad part on both faces of an optical fiber. CONSTITUTION:The optical fixed attenuator, one end of which is used as an optical connector plug and the other end as an optical receptacle, is used as an object and the reflecting film 9 is formed to the clad part 8 of the optical fiber 1 at both end faces of the optical fiber 1. A spacer 3 is provided to the receptacle side of a terminal fitting 2 and the quantity of loss (quantity of attenuation) is determined by the length of this spacer 3. Since the reflecting film 9 is formed to the clad part 8 of the optical fiber 1, the light propagation of a clad mode in the juncture of the connector plug of a transmission line and the connector plug of the optical fixed attenuator can be suppressed. The interference of the clad mode propagated light at the other end of the optical fixed attenuator and the core mode propagated light is thereby suppressed and the deterioration in the transmission characteristic is suppressed.
JP63083068A 1988-04-06 1988-04-06 Optical fixed attenuator Pending JPH01255803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63083068A JPH01255803A (en) 1988-04-06 1988-04-06 Optical fixed attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63083068A JPH01255803A (en) 1988-04-06 1988-04-06 Optical fixed attenuator

Publications (1)

Publication Number Publication Date
JPH01255803A true JPH01255803A (en) 1989-10-12

Family

ID=13791863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63083068A Pending JPH01255803A (en) 1988-04-06 1988-04-06 Optical fixed attenuator

Country Status (1)

Country Link
JP (1) JPH01255803A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6490391B1 (en) 2000-07-12 2002-12-03 Oluma, Inc. Devices based on fibers engaged to substrates with grooves
US6501875B2 (en) 2000-06-27 2002-12-31 Oluma, Inc. Mach-Zehnder inteferometers and applications based on evanescent coupling through side-polished fiber coupling ports
US6516114B2 (en) 2000-06-27 2003-02-04 Oluma, Inc. Integration of fibers on substrates fabricated with grooves
US6542663B1 (en) 2000-09-07 2003-04-01 Oluma, Inc. Coupling control in side-polished fiber devices
US6571035B1 (en) 2000-08-10 2003-05-27 Oluma, Inc. Fiber optical switches based on optical evanescent coupling between two fibers
US6597833B1 (en) 2000-06-27 2003-07-22 Oluma, Inc. Wavelength-division multiplexers and demultiplexers based on mach-zehnder interferometers and evanescent coupling
US6621952B1 (en) 2000-08-10 2003-09-16 Oluma, Inc. In-fiber variable optical attenuators and modulators using index-changing liquid media
US6621951B1 (en) 2000-06-27 2003-09-16 Oluma, Inc. Thin film structures in devices with a fiber on a substrate
US6625349B2 (en) 2000-06-27 2003-09-23 Oluma, Inc. Evanescent optical coupling between a waveguide formed on a substrate and a side-polished fiber
US6744948B1 (en) 2001-06-20 2004-06-01 Oluma, Inc. Fiber tap monitor based on evanescent coupling

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685702A (en) * 1979-12-14 1981-07-13 Fujitsu Ltd Variable attenuator
JPS5743406B2 (en) * 1976-12-22 1982-09-14
JPS597312A (en) * 1982-07-02 1984-01-14 Nec Corp Optical isolator
JPS62172306A (en) * 1986-01-24 1987-07-29 Nippon Telegr & Teleph Corp <Ntt> Method for forming film on end surface of optical fiber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5743406B2 (en) * 1976-12-22 1982-09-14
JPS5685702A (en) * 1979-12-14 1981-07-13 Fujitsu Ltd Variable attenuator
JPS597312A (en) * 1982-07-02 1984-01-14 Nec Corp Optical isolator
JPS62172306A (en) * 1986-01-24 1987-07-29 Nippon Telegr & Teleph Corp <Ntt> Method for forming film on end surface of optical fiber

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6597833B1 (en) 2000-06-27 2003-07-22 Oluma, Inc. Wavelength-division multiplexers and demultiplexers based on mach-zehnder interferometers and evanescent coupling
US6501875B2 (en) 2000-06-27 2002-12-31 Oluma, Inc. Mach-Zehnder inteferometers and applications based on evanescent coupling through side-polished fiber coupling ports
US6516114B2 (en) 2000-06-27 2003-02-04 Oluma, Inc. Integration of fibers on substrates fabricated with grooves
US6625349B2 (en) 2000-06-27 2003-09-23 Oluma, Inc. Evanescent optical coupling between a waveguide formed on a substrate and a side-polished fiber
US6556746B1 (en) 2000-06-27 2003-04-29 Oluma, Inc. Integrated fiber devices based on Mach-Zehnder interferometers and evanescent optical coupling
US6621951B1 (en) 2000-06-27 2003-09-16 Oluma, Inc. Thin film structures in devices with a fiber on a substrate
US6490391B1 (en) 2000-07-12 2002-12-03 Oluma, Inc. Devices based on fibers engaged to substrates with grooves
US6690857B2 (en) 2000-07-12 2004-02-10 Oluma, Inc. Fiber devices having side evanescent coupling port
US6571035B1 (en) 2000-08-10 2003-05-27 Oluma, Inc. Fiber optical switches based on optical evanescent coupling between two fibers
US6621952B1 (en) 2000-08-10 2003-09-16 Oluma, Inc. In-fiber variable optical attenuators and modulators using index-changing liquid media
US6542663B1 (en) 2000-09-07 2003-04-01 Oluma, Inc. Coupling control in side-polished fiber devices
US6744948B1 (en) 2001-06-20 2004-06-01 Oluma, Inc. Fiber tap monitor based on evanescent coupling

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