Optical: systems and elements – Optical amplifier – Dispersion compensation
Reexamination Certificate
2008-05-27
2008-05-27
Hughes, Deandra M (Department: 3663)
Optical: systems and elements
Optical amplifier
Dispersion compensation
Reexamination Certificate
active
07379235
ABSTRACT:
Reducing polarization dependence of a dispersion variation monitor includes receiving an optical signal. The optical signal is split into a first polarized signal having first photons and a second polarized signal having second photons. The first photons are received at a first material of a first detector, where the first material is operable to produce a reaction in response to the arrival of a predetermined number of photons. The second photons are received at a second material of a second detector, where the second material is substantially similar to the first material. A first current produced by the first material in response to receiving the first photons and a second current produced by the second material in response to receiving the second photons are monitored. Whether there is wavelength dispersion variation among the plurality of components is established in accordance with the first current and the second current.
REFERENCES:
patent: 6271952 (2001-08-01), Epworth
patent: 6396606 (2002-05-01), Mao
patent: 6493473 (2002-12-01), Wooten
patent: 6738181 (2004-05-01), Nakamoto et al.
patent: 6829440 (2004-12-01), Ooi et al.
patent: 6999688 (2006-02-01), Hui et al.
patent: 7106979 (2006-09-01), Taylor
patent: 2002/0118422 (2002-08-01), Cao
patent: 2003/0123776 (2003-07-01), Koch et al.
patent: 2003/0156776 (2003-08-01), Han et al.
patent: 2004/0095582 (2004-05-01), Holbrook
patent: 2004/0208618 (2004-10-01), Roberts et al.
patent: 2004/0208646 (2004-10-01), Choudhary et al.
patent: 2005/0078964 (2005-04-01), Takahara et al.
patent: 2005/0265727 (2005-12-01), Glingener
patent: 2006/0013592 (2006-01-01), Isomura et al.
Brida et al. Twin-Photon Techniques for Photo-Detector Calibration. Laser Physics Letters 3. (2006) 115. published May 2005.
Ogawa et al. High-Sensitivity Pulse Spectrogram measurement using two-photon absroption in a semiconductor at a 1.5 micron wavelength. Jul. 31, 2000. Optics Express. vol. 7. No. 3.
Gisen et al. Twin-Photon Techniques for Fiber Measurements. arXiv:quant-ph/9807063v122Jul1998.
Petersen, M.N., et al., “Dispersion monitoring and compensation using a single in-band subcarrier tone”, © 2000 Optical Society of America, pp. WH4-1-WH4-3.
Pan, Z., et al., “Chromatic dispersion monitoring and automated compensation for NRZ and RZ data using clock regeneration and fading without adding signaling”, © 2000 Optical Society of America, pp. WH5-1-WH5-3.
Nezam, S.M.R. Motaghian, et al., “Chromatic Dispersion Monitoring Using Partial Optical Filtering and Phase-Shift Detection of Bit Rate and Doubled Half Bit Rate Frequency Components”, © 2004 Optical Society of America, 3 pages.
Bhandare, Suhas, et al., “Fully automatic, tunable chromatic dispersion compensation at 40 Gbit/s in ASK and DPSK, NRZ and CSRZ, 263 km transmission experiments”, 15C1-4; Ninth Optoelectronics and Communications Conference, Third International Conference on Optical Internet (OECC/COIN2004), Technical Digest, Jul. 2004, 2 pages.
Kawasaki, Takeshi, et al., “Adaptive Dispersion Compensation Experiment in 15×43Gbit/s 400km Transmission by a Simple Dispersion Monitoring Scheme utilizing the periodic frequency response of AWG”, Ninth Optoelectronics and Communications Conference, Third International Conference on Optical Internet (OECC/COIN2004), Technical Digest, Jul. 2004, 2 pages.
Hayashi, M., et al., “All-Optical Chromatic Dispersion Monitor Using Optical Correlation with Cross Absorption Modulation Effect”, European Conference on Optical Communication, 2 pages, Sep. 2004.
Mohs, G., et al., “Rapid dispersion compensation optimization without BER measurements”, European Conference on Optical Communication, 2 pages, Sep. 2004.
Patent Application entitled, “Monitoring Wavelength Dispersion Variation Using Photon Absorption”, 28 pages specification, claims and abstract, 2 pages of drawings, inventors Cechan (nmi) Tian et al, Feb. 18, 2005.
Kinoshita Susumu
Tian Cechan
Baker & Botts L.L.P.
Fujitsu Limited
Hughes Deandra M
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