Optical communications – Transmitter – Including specific optical elements
Reexamination Certificate
2010-09-01
2011-12-27
Pascal, Leslie (Department: 2613)
Optical communications
Transmitter
Including specific optical elements
C398S188000
Reexamination Certificate
active
08086112
ABSTRACT:
An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation element, and another optical path that connects a third optical directional coupler to which the probe light is input, to the second optical directional coupler via a variable optical attenuator and an optical phase shifter; and a bandpass filter connected to the second optical directional coupler.
REFERENCES:
patent: 4817207 (1989-03-01), Smith et al.
patent: 5754714 (1998-05-01), Suzuki et al.
patent: 2004/0036946 (2004-02-01), Webb et al.
patent: 07-20510 (1995-01-01), None
patent: 08-179385 (1996-07-01), None
patent: 2002-162657 (2002-06-01), None
patent: 2003-195237 (2003-07-01), None
patent: 2006-030295 (2006-02-01), None
Haruhiko Yoshida, et al., “Ultrafast All-Optical Switching and Modulation Using Intersubband Transitions in Coupled Quantum Well Structures,” IEICE Trans. Electron., vol. E87-C, No. 7, pp. 1134-1141, July 2004.
R. Akimoto, et al., “Subpicosecond saturation of intersubband absorption in (CdS/ZnSe)/BeTe quantum-well waveguides at telecommunication wavelength”, Applied Physics Letters 87, 181104 (2005).
Norio Iisuka, et al., “Sub-picosecond all optical gate utillizing aN intersubband transition”, Optics Express., vol. 13, No. 10, pp. 3835-3840, May 16, 2005.
Hidemi Tsuchiya, et al. “10-Gb/s wavelength conversion using cross phase modulation in InGaAs/AlAsSb quantum well intersubband transition”, ASIT, Central Res. Lab. Hitachi, No. 67 Applied Physics Seminer Booklet No. 3, p. 1076, Aug. 30, 2006, Ritsumeikan University.
Hiroshi Ishikawa, et al., Mechanism of TE light phase modulation by TM gate pulse in InGaAs/AlAs/AlAsSb Intersubband transition switch, No. 67 Applied Physics Seminer Booklet No. 3, p. 1076, Aug. 30, 2006, Ritsumeikan University.
Hiroshi Ishikawa, et al., “Ultrafast All-Optical Refractive Index Modulation in Intersubband Transition Switch Using InGaAs/AlAsSb Quantum Well”, Japanese Journal of Applied Physics, vol. 46, No. 8, 2007, pp. L157-L160, (published online Feb. 16, 2007).
Hidemi Tsuchida, et al., “Cross-phase-modulation-based wavelength conversion using intersubband transition in InGaAs/AlAs/AlAsSb coupled quantum wells”, Optical Society of America, Optics Letters, Apr. 1, 2007, vol. 32, No. 7, pp. 751-753 (Publised Mar. 5, 2007).
Notice of Reasons for Rejection from the Japanese Patent Office in JP Application No. 2006-228604, mailed on Mar. 29, 2011.
Ishikawa Hiroshi
Miyazaki Tetsuya
Sarwar Abedin Kazi
Shimoyama Takashi
Tsuchida Hidemi
Law Office of Katsuhiro Arai
National Institute of Advanced Industrial Science and Technology
National Institute of Information and Communications Technology
Pascal Leslie
LandOfFree
Optical signal processing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical signal processing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical signal processing circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4254974