JPS5729005A - Optical branching filter - Google Patents

Optical branching filter

Info

Publication number
JPS5729005A
JPS5729005A JP10357480A JP10357480A JPS5729005A JP S5729005 A JPS5729005 A JP S5729005A JP 10357480 A JP10357480 A JP 10357480A JP 10357480 A JP10357480 A JP 10357480A JP S5729005 A JPS5729005 A JP S5729005A
Authority
JP
Japan
Prior art keywords
rays
wavelength
photodetector
constitution
lens
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
JP10357480A
Other languages
Japanese (ja)
Inventor
Ryuichi Watanabe
Kiyoshi Nosu
Kazuhito Onishi
Yoji Fujii
Kenji Okada
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 JP10357480A priority Critical patent/JPS5729005A/en
Publication of JPS5729005A publication Critical patent/JPS5729005A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
    • 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
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29307—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide components assembled in or forming a solid transparent unitary block, e.g. for facilitating component alignment
    • 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
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29308—Diffractive element having focusing properties, e.g. curved gratings
    • 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
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/2931—Diffractive element operating in reflection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Communication System (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To facilitate forming an optical circuit of a small size and a small loss and to integrated it with an electric circuit into one body by providing wavelength dispersing elements on the exit side of an input optical fiber, and receiving the rays consisting of different wavelengths dispersed by said elements respectively by separate photodetectors. CONSTITUTION:An input optical fiber 1 and a photodetector 6 are arranged in such a way that the center of the core of the former and that of the photodetecting surfaces 71-7n of the latter align on one straight line and that the end faces thereof array on the same plane. The rays consisting of plural different wavelengths emitting from the fiber 1 are converted to parallel rays by a lens 2. These rays receive wavelength dispersion by a diffraction grating 3 and are reflected at the angles differing with each wavelength. These reflected rays are converged again by the lens 2 and form focus at the pisitions differing for each wavelength. Since the surfaces 71- 7n of the photodetector 6 are installed in the focal positions of these respective wavelengths, the rays of the respective wavelengths operate as optical branching filters detected at the respectively different photodetecting surfaces. Hence, with such constitution, the optical circuit of a small size and a low loss and an electric circuit are easily formed into one body.
JP10357480A 1980-07-30 1980-07-30 Optical branching filter Pending JPS5729005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10357480A JPS5729005A (en) 1980-07-30 1980-07-30 Optical branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10357480A JPS5729005A (en) 1980-07-30 1980-07-30 Optical branching filter

Publications (1)

Publication Number Publication Date
JPS5729005A true JPS5729005A (en) 1982-02-16

Family

ID=14357555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10357480A Pending JPS5729005A (en) 1980-07-30 1980-07-30 Optical branching filter

Country Status (1)

Country Link
JP (1) JPS5729005A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095508A (en) * 1983-10-31 1985-05-28 Nec Corp Diffraction grating type optical multiplexer
WO1999046629A1 (en) * 1998-03-11 1999-09-16 Nippon Sheet Glass Co., Ltd. Optical demultiplexer
WO2000076000A1 (en) * 1999-06-04 2000-12-14 Nippon Sheet Glass Co., Ltd. Photodetector array device and optical demultiplexer using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521011A (en) * 1978-07-30 1980-02-14 Ritsuo Hasumi Thin fllm spectral module
JPS5588030A (en) * 1978-12-26 1980-07-03 Ricoh Co Ltd Photo branching method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521011A (en) * 1978-07-30 1980-02-14 Ritsuo Hasumi Thin fllm spectral module
JPS5588030A (en) * 1978-12-26 1980-07-03 Ricoh Co Ltd Photo branching method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095508A (en) * 1983-10-31 1985-05-28 Nec Corp Diffraction grating type optical multiplexer
WO1999046629A1 (en) * 1998-03-11 1999-09-16 Nippon Sheet Glass Co., Ltd. Optical demultiplexer
US6373606B1 (en) 1998-03-11 2002-04-16 Nippon Sheet Glass Co., Ltd. Optical demultiplexer
WO2000076000A1 (en) * 1999-06-04 2000-12-14 Nippon Sheet Glass Co., Ltd. Photodetector array device and optical demultiplexer using the same
US6710330B1 (en) 1999-06-04 2004-03-23 Nippon Sheet Glass Co., Ltd. Light-receiving element array device and optical demultiplexer using the same

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