Optical waveguides – Planar optical waveguide
Reexamination Certificate
2007-02-20
2007-02-20
Healy, Brian M. (Department: 2883)
Optical waveguides
Planar optical waveguide
C385S014000, C385S123000, C385S130000, C385S131000, C385S141000, C359S033000, C359S341100
Reexamination Certificate
active
10933477
ABSTRACT:
An optically amplifying waveguide that can have a gain having a small wave-length dependency in a wavelength range shorter than the C-band, and the like. The optical amplifier module1optically amplifies a signal lightwave that has a wavelength lying in a wavelength range of 1,490 to 1,530 nm and that has entered an input connector11to output the optically amplified signal lightwave from an output connector12.An optical isolator21,a WDM coupler31,an Er-doped optical fiber (EDF)50,a WDM coupler32,and an optical isolator22are provided in this order on a signal lightwave-transmitting path from the input connector11to the output connector12.A pump source41connected to the WDM coupler31and a pump source42connected to the WDM coupler32are also provided. In the EDF50,at least one of the stimulated-emission cross section and the absorption cross section assumes a maximum value at the shorter-wavelength side of a peak at a wavelength range of 1.53 μm.
REFERENCES:
patent: 5500764 (1996-03-01), Armitage et al.
patent: 2003/0007763 (2003-01-01), Bazylenko et al.
patent: 2003/0058526 (2003-03-01), Kakui
patent: 2004/0223211 (2004-11-01), Kakui et al.
patent: 2005/0078905 (2005-04-01), Kakui et al.
patent: 2001-313433 (2001-11-01), None
Etsuko Ishikawa et al.; “Novel 1500 nm-Brand EDFA with Discrete Raman Amplifier”;27th European Conference on Optical Communication; c. 2001; pp. 48-49.
Denis Barbier; “Performance and Potential Application of Erbium Doped Planar Waveguide Amplifiers and Lasers”;Optical Amplifiers and their Applications Technical Digest; c. 1997; pp. 72-92.
Motoki Kakui et al.; “Long-Wavelength-Band Optical Amplifiers Employing Silica-Based Erbium Doped Fibers Designed for Wavelength Division Multiplexing Systems and Networks;The English Journal of the Institute of Electronics, Information and Communication Engineers of Japan”; vol. E83-C, No. 6; c. 2000; pp. 799-815.
H. Ono et al.; “S-Band Erbium-Doped Silica Fibre Amplifier with Flattened-Gain of Over 21 dB”;Electronics Letters; vol. 38, No. 19; c. 2002; pp. 1084-1085.
Hitoshi Hatayama et al.; Variable Attenuation Slope Compensator (VASC) Using Silica-Based Planar Lightwave Circuit Technology for Active Gain Slope Control in EDFAs;Optical Fiber Communication Conference Technical Digest; c. 2000.
Fukuda Chie
Kakui Motoki
Healy Brian M.
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
LandOfFree
Optically amplifying waveguide, optical amplifier module,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically amplifying waveguide, optical amplifier module,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically amplifying waveguide, optical amplifier module,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3881897