Optical communications – Transmitter – Having particular modulation
Reexamination Certificate
2006-05-15
2010-10-12
Curs, Nathan M (Department: 2613)
Optical communications
Transmitter
Having particular modulation
C398S077000, C398S188000
Reexamination Certificate
active
07813652
ABSTRACT:
The present invention is an optical pulse time spreading device comprising a plurality of optical pulse time spreaders that output an input optical pulse as a series of chip pulses stream that are sequentially arranged time-spread on a time axis in accordance with optical phase code. Each of the optical pulse time spreaders comprises phase control means that supplies a phase difference between adjacent chip pulses. Identification parameters are introduced to realize channel discrimination by changing the phase difference conditions supplied between adjacent chip pulses for each of the phase control means. The phase control means have a structure in which an SSFBG is fixed to the core of the optical fiber, for example. The SSFBG has unit FBGs that are arranged in series in the waveguide direction of the core. The code values of the optical phase code established for the phase control means correspond each one-on-one with each of the unit FBGs.
REFERENCES:
patent: 7440656 (2008-10-01), Sasaki et al.
patent: 2002/0163696 (2002-11-01), Huang et al.
patent: 2004/0264965 (2004-12-01), Kobayashi et al.
patent: 2005/0084266 (2005-04-01), Pohjola et al.
patent: 2005/0089328 (2005-04-01), Nishiki et al.
patent: 2007/0223927 (2007-09-01), Sasaki et al.
patent: 2004-228840 (2004-08-01), None
“Optical code division multiplexing network”, Hideyuki Sotobayashi, Applied Physics, vol. 71, 7.(2002), pp. 853-859.
“Encoder/decoder on planar lightwave circuit for time-spreading/wavelength hopping optical CDMA” Koichi Takiguchi et al., OFC 2002, TuK8, Mar. 2002.
“A 10 Gb/s Optical Code Division Multiplexing Using 8-Chip Optical Bipolar Code and Coherent Detection”, Naoya Wada, et al., Journal of Lightwave Technology, vol. 7, No. 10., Oct. 1999.
“Development of planar light wave circuit into optical function device” Koichi Takiguichi, Applied Physics Journal, vol. 72, 11, pp. 1387-1392 (2003).
“Development of Encoder/Decoder of OCDM using a SSFBG” Akihiko Nishiki, et al., Technical Report of IEICE OFT2002-66, (Nov. 2002).
Office Action issued in counterpart Japanese Patent Application No. 2005-142368 on Dec. 1, 2009, with English-language translation.
Curs Nathan M
Oki Electric Industry Co. Ltd.
Rabin & Berdo PC
LandOfFree
Optical pulse time spreading device 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 pulse time spreading device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pulse time spreading device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4162342