Title:
BISTABLE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2011/090079
Kind Code:
A1
Abstract:
Disclosed is a bistable element which can have a reduced size compared with conventional bistable elements and can have a broad bistable hysteresis width. Specifically disclosed is a bistable element (100) comprising: a multi-mode interference optical waveguide (1) which is arranged on a substrate (10), has two ports on one edge face (1a) thereof, and has one port on the other edge face (1b) thereof; a first group of optical waveguides (2) which are arranged on the substrate (10), and each of which is composed of two optical waveguides (a first optical waveguide (2a), a second optical waveguide (2b)) each having one edge face connected to each port arranged on the one edge face (1a) side of the multi-mode interference optical waveguide (1); and a second group of optical waveguides (3) which are arranged on the substrate (10), and each of which is composed of one optical waveguide (a third optical waveguide (3a)) having one edge face connected to each port arranged on the other edge face (1b) side of the multi-mode interference optical waveguide (1). The multi-mode interference optical waveguide (1) has a saturable absorption region (22) where the absorption coefficient is reduced to cause the saturation of the amount of absorbed light when the intensity of incident light becomes high.
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Inventors:
HAMAMOTO KIICHI (JP)
Application Number:
PCT/JP2011/050881
Publication Date:
July 28, 2011
Filing Date:
January 19, 2011
Export Citation:
Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
HAMAMOTO KIICHI (JP)
HAMAMOTO KIICHI (JP)
International Classes:
G02F3/02; H01S5/50
Foreign References:
| JP2004071875A | 2004-03-04 | |||
| JP2003084327A | 2003-03-19 | |||
| JP2008250110A | 2008-10-16 |
Other References:
BASTAWROUS, H.A. ET AL.: "Optical memory elements with extremely wide hysteresis window (94mA) using partly saturable-absorber novel active MMI bi-stable laser diodes", OPTICAL FIBER COMMUNICATION (OFC), COLLOCATED NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, 2010 CONFERENCE ON (OFC/NFOEC), 2010, XP031677094
BASTAWROUS, H.A. ET AL.: "Extremely wide and uniform hysteresis window (32mA) for integrated optical RAM using novel active MMI-BLD", OPTICAL FIBER COMMUNICATION - INCLUDES POST DEADLINE PAPERS, 2009 CONFERENCE ON, 2009, XP031467941
TAKENAKA, M. ET AL.: "All-optical flip-flop multimode interference bistable laser diode", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 17, no. 5, May 2005 (2005-05-01), pages 968 - 970, XP011130725
TAKEDA, K. ET AL.: "Experimental study on wavelength tunability of all-optical flip-flop based on multimode-interference bistable laser diode", IEEE PHOTONICS JOURNAL, vol. 1, no. 1, 1 June 2009 (2009-06-01), pages 40 - 47, XP011484888
M. TAKENAKA: "Multimode Interference Bistable Laser Diode", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 15, no. 8, pages 1035 - 1037, XP011432651, DOI: doi:10.1109/LPT.2003.815361
H. A. BASTAWROUS: "A Novel Active MMI Bi-Stable Laser Using Cross-Gain Saturation Between Fundamental and First Order Modes", PROCEEDINGS OF THE 34TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION, vol. 15, September 2008 (2008-09-01), pages 81 - 82
See also references of EP 2527917A4
BASTAWROUS, H.A. ET AL.: "Extremely wide and uniform hysteresis window (32mA) for integrated optical RAM using novel active MMI-BLD", OPTICAL FIBER COMMUNICATION - INCLUDES POST DEADLINE PAPERS, 2009 CONFERENCE ON, 2009, XP031467941
TAKENAKA, M. ET AL.: "All-optical flip-flop multimode interference bistable laser diode", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 17, no. 5, May 2005 (2005-05-01), pages 968 - 970, XP011130725
TAKEDA, K. ET AL.: "Experimental study on wavelength tunability of all-optical flip-flop based on multimode-interference bistable laser diode", IEEE PHOTONICS JOURNAL, vol. 1, no. 1, 1 June 2009 (2009-06-01), pages 40 - 47, XP011484888
M. TAKENAKA: "Multimode Interference Bistable Laser Diode", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 15, no. 8, pages 1035 - 1037, XP011432651, DOI: doi:10.1109/LPT.2003.815361
H. A. BASTAWROUS: "A Novel Active MMI Bi-Stable Laser Using Cross-Gain Saturation Between Fundamental and First Order Modes", PROCEEDINGS OF THE 34TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION, vol. 15, September 2008 (2008-09-01), pages 81 - 82
See also references of EP 2527917A4
Attorney, Agent or Firm:
HIRAI YASUO (JP)
Yasuo Hirai (JP)
Yasuo Hirai (JP)
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Claims: