CA2246500A1 - Multilayer thin film bandpass filter - Google Patents

Multilayer thin film bandpass filter

Info

Publication number
CA2246500A1
CA2246500A1 CA002246500A CA2246500A CA2246500A1 CA 2246500 A1 CA2246500 A1 CA 2246500A1 CA 002246500 A CA002246500 A CA 002246500A CA 2246500 A CA2246500 A CA 2246500A CA 2246500 A1 CA2246500 A1 CA 2246500A1
Authority
CA
Canada
Prior art keywords
ripple
cavities
wave
thin film
stacks
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
CA002246500A
Other languages
French (fr)
Other versions
CA2246500C (en
Inventor
David Henry Cushing
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.)
Lumentum Ottawa Inc
Original Assignee
Jds Fitel Inc.
David Henry Cushing
Jds Uniphase 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 Jds Fitel Inc., David Henry Cushing, Jds Uniphase Inc. filed Critical Jds Fitel Inc.
Publication of CA2246500A1 publication Critical patent/CA2246500A1/en
Application granted granted Critical
Publication of CA2246500C publication Critical patent/CA2246500C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • G02B5/288—Interference filters comprising deposited thin solid films comprising at least one thin film resonant cavity, e.g. in bandpass filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters

Abstract

A novel design for producing band pass filters with essentially square shapes with little or no ripple in the passband zone. Filters are of the all-dielectric type consist of multiple cavities of band passes. Quarter wave thick layers of low index material separate all of the cavities from each other. Multiple half-waves may be added to the outer cavity quarter-wave stacks in particular. This invention provides the addition of half wave to some of the inner cavity stacks to remove ripple that would otherwise be present.
Together, these additional half wave layers added to the outer and inner cavities sharpen the transition from low transmission to high transmission without unduly adding ripple to the high transmission zone.
CA002246500A 1997-09-12 1998-09-03 Multilayer thin film bandpass filter Expired - Fee Related CA2246500C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/928,479 1997-09-12
US08/928,479 US6018421A (en) 1995-06-28 1997-09-12 Multilayer thin film bandpass filter

Publications (2)

Publication Number Publication Date
CA2246500A1 true CA2246500A1 (en) 1999-03-12
CA2246500C CA2246500C (en) 2003-03-25

Family

ID=25456294

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002246500A Expired - Fee Related CA2246500C (en) 1997-09-12 1998-09-03 Multilayer thin film bandpass filter

Country Status (4)

Country Link
US (1) US6018421A (en)
EP (1) EP0902305A1 (en)
JP (1) JPH11153711A (en)
CA (1) CA2246500C (en)

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EP0966696B1 (en) * 1998-01-15 2004-05-26 Ciena Corporation Optical interference filter
WO1999047956A1 (en) * 1998-03-19 1999-09-23 Ciena Corporation Fabry-perot optical filter and method of making the same
JP3332879B2 (en) * 1998-12-02 2002-10-07 キヤノン株式会社 Dichroic mirror
GB9901858D0 (en) * 1999-01-29 1999-03-17 Secr Defence Optical filters
US6396632B1 (en) 2000-07-25 2002-05-28 Nortel Networks Limited Tunable optical filter and optical modulator
US6587608B2 (en) 2000-11-14 2003-07-01 Chameleon Optics, Inc. Reconfigurable, all optical add/drop nodes using non-interrupting switching apparatus and methods
JP3893533B2 (en) * 2001-02-09 2007-03-14 株式会社日立製作所 Liquid crystal display
US6763046B2 (en) * 2001-03-01 2004-07-13 Applied Optoelectronics, Inc. Method and system employing multiple reflectivity band reflector for laser wavelength monitoring
US6781757B2 (en) 2001-04-20 2004-08-24 Micron Optics, Inc. Polarization insensitive tunable optical filters
US7049004B2 (en) * 2001-06-18 2006-05-23 Aegis Semiconductor, Inc. Index tunable thin film interference coatings
WO2003001251A1 (en) * 2001-06-25 2003-01-03 Massachusetts Institute Of Technology Air gaps for optical applications
JP4653912B2 (en) * 2001-08-30 2011-03-16 光伸光学工業株式会社 Multi-cavity bandpass filter and manufacturing method thereof
JP3687848B2 (en) * 2001-11-28 2005-08-24 日立金属株式会社 Thin film filter for optical multiplexer / demultiplexer and method for manufacturing the same
US6850366B2 (en) * 2002-10-09 2005-02-01 Jds Uniphase Corporation Multi-cavity optical filter
US7228025B1 (en) * 2002-10-31 2007-06-05 Finisar Corporation Thin film interleaver
MD2346G2 (en) * 2003-03-14 2004-09-30 Ион ТИГИНЯНУ Optical filter
US20040234198A1 (en) * 2003-03-21 2004-11-25 Aegis Semiconductor, Inc. Tunable and switchable multiple-cavity thin film optical filters
US6831784B2 (en) * 2003-03-31 2004-12-14 Kyocera Corporation Multilayered optical thin-film filter, method of designing the same and filter module utilizing the same
US6911674B2 (en) * 2003-04-16 2005-06-28 Zeolux Corporation Feedback and coupling structures and methods
JP2007524828A (en) * 2003-06-20 2007-08-30 アイギス セミコンダクター インコーポレイテッド Thermo-optic filter and infrared sensor using the same
WO2005022900A2 (en) * 2003-08-26 2005-03-10 Redshift Systems Corporation Infrared camera system
US7221827B2 (en) * 2003-09-08 2007-05-22 Aegis Semiconductor, Inc. Tunable dispersion compensator
CA2540184A1 (en) * 2003-10-07 2005-04-21 Aegis Semiconductor, Inc. Tunable optical filter with heater on a cte-matched transparent substrate
CN100373184C (en) * 2004-01-06 2008-03-05 同济大学 Broad cut-off band bipassage bandpass optical filter and its preparation method
JP4383194B2 (en) * 2004-02-03 2009-12-16 古河電気工業株式会社 Dielectric multilayer filter having predetermined wavelength optical characteristics, design method thereof, design program thereof, and optical add / drop system using the dielectric multilayer filter
TWI237129B (en) * 2004-06-17 2005-08-01 Asia Optical Co Inc CWDM filter
TWI234010B (en) * 2004-07-16 2005-06-11 Asia Optical Co Inc CWDM filter for eliminating noise signals
JP2006215212A (en) * 2005-02-02 2006-08-17 Omron Corp Optical multiplexer/demultiplexer and method of manufacturing the same
TWI295102B (en) * 2006-01-13 2008-03-21 Ind Tech Res Inst Multi-functional substrate structure
US7773302B2 (en) * 2006-09-01 2010-08-10 Semrock, Inc. Low cost filter for fluorescence systems
CN101614832A (en) * 2008-06-24 2009-12-30 鸿富锦精密工业（深圳）有限公司 Film stacking structure
TWI383173B (en) * 2008-07-04 2013-01-21 Hon Hai Prec Ind Co Ltd Film stacked structure
CN102841396A (en) * 2011-06-21 2012-12-26 亚洲光学股份有限公司 Light filter device
US8724221B2 (en) * 2011-06-22 2014-05-13 Asia Optical Co., Inc. Optical interference bandpass filter
US20210282663A1 (en) * 2017-01-16 2021-09-16 Koninklijke Philips N.V. Capnography with lead selenide detector and integrated bandpass filter
CN114500894A (en) * 2020-10-27 2022-05-13 三星电子株式会社 Spectral filter, image sensor including the spectral filter, and electronic device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD226742A3 (en) * 1983-04-04 1985-08-28 Zeiss Jena Veb Carl INTERFERENCE FILTER WITH A THROUGH BAND
US5144498A (en) * 1990-02-14 1992-09-01 Hewlett-Packard Company Variable wavelength light filter and sensor system
US5999322A (en) * 1995-06-28 1999-12-07 Cushing; David Henry Multilayer thin film bandpass filter
US5719989A (en) * 1995-06-28 1998-02-17 Jds Fitel Inc. Multilayer thin film bandpass filter

Also Published As

Publication number Publication date
EP0902305A1 (en) 1999-03-17
JPH11153711A (en) 1999-06-08
US6018421A (en) 2000-01-25
CA2246500C (en) 2003-03-25

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