WO2004057376A3 - Optical multiplexing device - Google Patents

Optical multiplexing device Download PDF

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Publication number
WO2004057376A3
WO2004057376A3 PCT/US2003/040420 US0340420W WO2004057376A3 WO 2004057376 A3 WO2004057376 A3 WO 2004057376A3 US 0340420 W US0340420 W US 0340420W WO 2004057376 A3 WO2004057376 A3 WO 2004057376A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical
diffractive
element set
multiplexing
diffractive element
Prior art date
Application number
PCT/US2003/040420
Other languages
French (fr)
Other versions
WO2004057376A2 (en
Inventor
Dmitri Iazikov
Thomas W Mossberg
Christoph M Greiner
Original Assignee
Lightsmyth Technologies Inc
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 Lightsmyth Technologies Inc filed Critical Lightsmyth Technologies Inc
Priority to AU2003297344A priority Critical patent/AU2003297344A1/en
Publication of WO2004057376A2 publication Critical patent/WO2004057376A2/en
Publication of WO2004057376A3 publication Critical patent/WO2004057376A3/en

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
    • G02B6/26—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
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317—Light guides of the optical fibre type
    • G02B6/29322—Diffractive elements of the tunable type
    • 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
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29325—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide of the slab or planar or plate like form, i.e. confinement in a single transverse dimension only
    • G02B6/29326—Diffractive elements 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
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29325—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide of the slab or planar or plate like form, i.e. confinement in a single transverse dimension only
    • G02B6/29328—Diffractive elements operating in reflection
    • 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
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29325—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide of the slab or planar or plate like form, i.e. confinement in a single transverse dimension only
    • G02B6/29329—Diffractive elements operating in transmission
    • 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
    • G02B6/29379—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 characterised by the function or use of the complete device
    • G02B6/2938—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 characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
    • G02B6/29382—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 characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM including at least adding or dropping a signal, i.e. passing the majority of signals
    • G02B6/29383—Adding and dropping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing

Abstract

An optical multiplexing device includes an optical element having at least one set of diffractive elements (101), and an optical reflector (103). The reflector routes, between first and second optical ports (100, 104), that portion of an optical signal transmitted by the diffractive element set. The diffractive element set routes, between first and multiplexing optical ports (100, 102), a portion of the optical signal that is diffracted by the diffractive element set. More complex optical multiplexing functionality(ies) may be achieved using additional sets of diffractive elements, in a common optical element (and possibly overlaid) or in separate optical elements with multiple reflectors. Separate multiplexing devices may be assembled with coupled ports for forming more complex devices. The respective portions of an optical signal transmitted by and reflected/diffracted from the diffractive element set typically differ spectrally. The portion reflected from the diffractive element set may comprise one or more channels of an optical WDM system.
PCT/US2003/040420 2002-12-17 2003-12-17 Optical multiplexing device WO2004057376A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003297344A AU2003297344A1 (en) 2002-12-17 2003-12-17 Optical multiplexing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43418302P 2002-12-17 2002-12-17
US60/434,183 2002-12-17

Publications (2)

Publication Number Publication Date
WO2004057376A2 WO2004057376A2 (en) 2004-07-08
WO2004057376A3 true WO2004057376A3 (en) 2004-10-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/040420 WO2004057376A2 (en) 2002-12-17 2003-12-17 Optical multiplexing device

Country Status (3)

Country Link
US (2) US7224855B2 (en)
AU (1) AU2003297344A1 (en)
WO (1) WO2004057376A2 (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE42407E1 (en) 2000-03-16 2011-05-31 Steyphi Services De Llc Distributed optical structures with improved diffraction efficiency and/or improved optical coupling
US7773842B2 (en) * 2001-08-27 2010-08-10 Greiner Christoph M Amplitude and phase control in distributed optical structures
US7519248B2 (en) 2000-03-16 2009-04-14 Lightsmyth Technologies Inc Transmission gratings designed by computed interference between simulated optical signals and fabricated by reduction lithography
US6879441B1 (en) * 2000-03-16 2005-04-12 Thomas Mossberg Holographic spectral filter
USRE42206E1 (en) 2000-03-16 2011-03-08 Steyphi Services De Llc Multiple wavelength optical source
USRE41570E1 (en) 2000-03-16 2010-08-24 Greiner Christoph M Distributed optical structures in a planar waveguide coupling in-plane and out-of-plane optical signals
US6987911B2 (en) * 2000-03-16 2006-01-17 Lightsmyth Technologies, Inc. Multimode planar waveguide spectral filter
US7194164B2 (en) 2000-03-16 2007-03-20 Lightsmyth Technologies Inc Distributed optical structures with improved diffraction efficiency and/or improved optical coupling
US7224855B2 (en) 2002-12-17 2007-05-29 Lightsmyth Technologies Inc. Optical multiplexing device
US7260290B1 (en) 2003-12-24 2007-08-21 Lightsmyth Technologies Inc Distributed optical structures exhibiting reduced optical loss
US7181103B1 (en) 2004-02-20 2007-02-20 Lightsmyth Technologies Inc Optical interconnect structures incorporating sets of diffractive elements
US7359597B1 (en) 2004-08-23 2008-04-15 Lightsmyth Technologies Inc Birefringence control in planar optical waveguides
US7120334B1 (en) 2004-08-25 2006-10-10 Lightsmyth Technologies Inc Optical resonator formed in a planar optical waveguide with distributed optical structures
US7330614B1 (en) 2004-12-10 2008-02-12 Lightsmyth Technologies Inc. Integrated optical spectrometer incorporating sets of diffractive elements
US7327908B1 (en) 2005-03-07 2008-02-05 Lightsmyth Technologies Inc. Integrated optical sensor incorporating sets of diffractive elements
US7349599B1 (en) 2005-03-14 2008-03-25 Lightsmyth Technologies Inc Etched surface gratings fabricated using computed interference between simulated optical signals and reduction lithography
US7643400B1 (en) 2005-03-24 2010-01-05 Lightsmyth Technologies Inc Optical encoding of data with distributed diffractive structures
US7190856B1 (en) 2005-03-28 2007-03-13 Lightsmyth Technologies Inc Reconfigurable optical add-drop multiplexer incorporating sets of diffractive elements
US8068709B2 (en) * 2005-09-12 2011-11-29 Lightsmyth Technologies Inc. Transmission gratings designed by computed interference between simulated optical signals and fabricated by reduction lithography
CN101438192A (en) * 2006-03-31 2009-05-20 铱诺博伦斯有限公司 Planar lightwave filter with mixed diffraction elements
US7720334B1 (en) 2006-07-07 2010-05-18 Mossberg Thomas W Laterally-confined holographic spectral filters
US7889991B2 (en) * 2007-02-12 2011-02-15 Jds Uniphase Corporation Planar lightwave circuit based tunable 3 port filter
US8774244B2 (en) 2009-04-21 2014-07-08 Daylight Solutions, Inc. Thermal pointer
US8335413B2 (en) 2010-05-14 2012-12-18 Daylight Solutions, Inc. Optical switch
US9225148B2 (en) 2010-09-23 2015-12-29 Daylight Solutions, Inc. Laser source assembly with thermal control and mechanically stable mounting
US8467430B2 (en) 2010-09-23 2013-06-18 Daylight Solutions, Inc. Continuous wavelength tunable laser source with optimum orientation of grating and gain medium
US9042688B2 (en) 2011-01-26 2015-05-26 Daylight Solutions, Inc. Multiple port, multiple state optical switch
US9162404B2 (en) * 2011-03-05 2015-10-20 Alcatel Lucent Radial optical coupler
US8682120B2 (en) 2011-03-05 2014-03-25 Alcatel Lucent Polarization-independent grating optical coupler
US8965204B2 (en) 2011-05-10 2015-02-24 Invensys Systems, Inc. Multi-drop optical communication
US9140854B2 (en) 2011-09-22 2015-09-22 Alcatel Lucent Spatial division multiplexing optical mode converter
US9134479B2 (en) * 2012-09-05 2015-09-15 International Business Machines Corporation Polarization diverse demultiplexing
US9482862B2 (en) 2013-07-26 2016-11-01 Neophotonics Corporation Adjustable grid tracking transmitters and receivers
US9753220B2 (en) * 2014-09-02 2017-09-05 Huawei Technologies Co., Ltd. System and method for optical input/output arrays
WO2021043424A1 (en) * 2019-09-06 2021-03-11 Telefonaktiebolaget Lm Ericsson (Publ) Optical node and optical transceiver for auto tuning of operational wavelength

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030007202A1 (en) * 2001-05-09 2003-01-09 Ondax, Inc. Microelectromechanical system (MEMS) based tunable hitless add-drop filter
US20030067645A1 (en) * 2001-08-27 2003-04-10 Adc Denmark Aps. Wavelength division multiplexed device

Family Cites Families (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB268215A (en) 1926-08-28 1927-03-31 Union Special Machine Co Improvements in sewing machines
DE2442652A1 (en) 1974-09-06 1976-03-18 Siemens Ag ARRANGEMENT FOR TUNABLE OPTICAL WAVE CONDUCTOR COMPONENTS
US4140362A (en) * 1977-07-14 1979-02-20 Bell Telephone Laboratories, Incorporated Forming focusing diffraction gratings for integrated optics
DE3035849A1 (en) 1980-09-23 1982-05-06 Siemens AG, 1000 Berlin und 8000 München PLANAR WAVE GUIDE BRAGG LENS
US4387955A (en) * 1981-02-03 1983-06-14 The United States Of America As Represented By The Secretary Of The Air Force Holographic reflective grating multiplexer/demultiplexer
NL8304311A (en) * 1983-12-15 1985-07-01 Philips Nv REFLECTION GRID.
US4660934A (en) * 1984-03-21 1987-04-28 Kokusai Denshin Denwa Kabushiki Kaisha Method for manufacturing diffraction grating
US4773063A (en) * 1984-11-13 1988-09-20 University Of Delaware Optical wavelength division multiplexing/demultiplexing system
GB8431087D0 (en) 1984-12-10 1985-01-16 Secr Defence Multiplexing & demultiplexing systems
FR2579044B1 (en) * 1985-03-13 1988-02-26 Commissariat Energie Atomique DEVICE FOR MULTIPLEXING MULTIPLE LIGHT SIGNALS IN INTEGRATED OPTICS
US4824193A (en) * 1985-07-26 1989-04-25 Matsushita Electric Industrial Co., Ltd. Holographic multiplexer/demultiplexer and its manufacturing method
US4743083A (en) * 1985-12-30 1988-05-10 Schimpe Robert M Cylindrical diffraction grating couplers and distributed feedback resonators for guided wave devices
FR2609180B1 (en) * 1986-12-31 1989-11-03 Commissariat Energie Atomique MULTIPLEXER-DEMULTIPLEXER USING A CONCAVE ELLIPTICAL NETWORK AND CONDUCTED IN INTEGRATED OPTICS
EP0282878B1 (en) * 1987-03-16 1995-06-14 Siemens Aktiengesellschaft Arrangement of optical-integrated spectrometer and method for the making the same
US4834474A (en) * 1987-05-01 1989-05-30 The University Of Rochester Optical systems using volume holographic elements to provide arbitrary space-time characteristics, including frequency-and/or spatially-dependent delay lines, chirped pulse compressors, pulse hirpers, pulse shapers, and laser resonators
GB8723050D0 (en) 1987-10-01 1987-11-04 British Telecomm Optical filters
JPH02143203A (en) * 1988-11-25 1990-06-01 Ricoh Co Ltd Optical multiplexer/demultiplexer element
US4923271A (en) * 1989-03-28 1990-05-08 American Telephone And Telegraph Company Optical multiplexer/demultiplexer using focusing Bragg reflectors
US5195161A (en) * 1991-12-11 1993-03-16 At&T Bell Laboratories Optical waveguide comprising Bragg grating coupling means
EP0568236B1 (en) * 1992-04-29 1999-06-16 AT&T Corp. Efficient reflective optical multiplexers and demultiplexers
WO1994019712A1 (en) 1993-02-26 1994-09-01 Yeda Research & Development Co., Ltd. Holographic optical devices
US5357591A (en) * 1993-04-06 1994-10-18 Yuan Jiang Cylindrical-wave controlling, generating and guiding devices
US5917625A (en) * 1993-09-09 1999-06-29 Kabushiki Kaisha Toshiba High resolution optical multiplexing and demultiplexing device in optical communication system
AUPM386794A0 (en) * 1994-02-14 1994-03-10 University Of Sydney, The Optical grating
CA2215021A1 (en) * 1995-03-13 1996-09-19 William Randall Babbitt Apparatus and methods for routing of optical beams via time-domain spatial-spectral filtering
US5768450A (en) * 1996-01-11 1998-06-16 Corning Incorporated Wavelength multiplexer/demultiplexer with varied propagation constant
SE9600758D0 (en) 1996-02-28 1996-02-28 Forskarpatent I Goeteborg Ab Hologram
US5999672A (en) 1997-12-13 1999-12-07 Light Chip, Inc. Integrated bi-directional dual axial gradient refractive index/diffraction grating wavelength division multiplexer
US6011884A (en) 1997-12-13 2000-01-04 Lightchip, Inc. Integrated bi-directional axial gradient refractive index/diffraction grating wavelength division multiplexer
US6011885A (en) 1997-12-13 2000-01-04 Lightchip, Inc. Integrated bi-directional gradient refractive index wavelength division multiplexer
CA2317784A1 (en) 1998-01-07 1999-07-15 Templex Technology, Inc. Composite diffraction gratings for signal processing and optical control applications
WO1999056159A1 (en) 1998-04-24 1999-11-04 Templex Technology Inc. Segmented complex diffraction gratings
US6473232B2 (en) 2000-03-08 2002-10-29 Canon Kabushiki Kaisha Optical system having a diffractive optical element, and optical apparatus
US7054517B2 (en) 2000-03-16 2006-05-30 Lightsmyth Technologies Inc Multiple-wavelength optical source
US6985656B2 (en) 2000-03-16 2006-01-10 Lightsmyth Technologies Inc Temperature-compensated planar waveguide optical apparatus
US6990276B2 (en) 2000-03-16 2006-01-24 Lightsmyth Technologies, Inc. Optical waveform recognition and/or generation and optical switching
US6993223B2 (en) 2000-03-16 2006-01-31 Lightsmyth Technologies, Inc. Multiple distributed optical structures in a single optical element
US6965464B2 (en) * 2000-03-16 2005-11-15 Lightsmyth Technologies Inc Optical processor
US7123794B2 (en) 2000-03-16 2006-10-17 Lightsmyth Technologies Inc Distributed optical structures designed by computed interference between simulated optical signals
US6829417B2 (en) 2001-08-27 2004-12-07 Christoph M. Greiner Amplitude and phase control in distributed optical structures
US6879441B1 (en) * 2000-03-16 2005-04-12 Thomas Mossberg Holographic spectral filter
US7194164B2 (en) 2000-03-16 2007-03-20 Lightsmyth Technologies Inc Distributed optical structures with improved diffraction efficiency and/or improved optical coupling
US6987911B2 (en) 2000-03-16 2006-01-17 Lightsmyth Technologies, Inc. Multimode planar waveguide spectral filter
US7773842B2 (en) * 2001-08-27 2010-08-10 Greiner Christoph M Amplitude and phase control in distributed optical structures
US6928223B2 (en) * 2000-07-14 2005-08-09 Massachusetts Institute Of Technology Stab-coupled optical waveguide laser and amplifier
WO2002054120A1 (en) * 2000-12-28 2002-07-11 Keio University Optical signal processing circuit and method of producing same
EP1430335B1 (en) 2001-08-27 2017-01-11 Steyphi Services DE LLC Amplitude and phase control in distributed optical structures
US7224855B2 (en) 2002-12-17 2007-05-29 Lightsmyth Technologies Inc. Optical multiplexing device
US7063260B2 (en) 2003-03-04 2006-06-20 Lightsmyth Technologies Inc Spectrally-encoded labeling and reading
US6823115B2 (en) 2003-03-10 2004-11-23 Christoph M. Greiner Optical structures distributed among multiple optical waveguides

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030007202A1 (en) * 2001-05-09 2003-01-09 Ondax, Inc. Microelectromechanical system (MEMS) based tunable hitless add-drop filter
US20030067645A1 (en) * 2001-08-27 2003-04-10 Adc Denmark Aps. Wavelength division multiplexed device

Also Published As

Publication number Publication date
US7224855B2 (en) 2007-05-29
WO2004057376A2 (en) 2004-07-08
AU2003297344A8 (en) 2004-07-14
USRE43226E1 (en) 2012-03-06
US20040131360A1 (en) 2004-07-08
AU2003297344A1 (en) 2004-07-14

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