Optical: systems and elements – Optical amplifier – Particular active medium
Reexamination Certificate
2007-10-02
2007-10-02
Hughes, Deandra M (Department: 3663)
Optical: systems and elements
Optical amplifier
Particular active medium
Reexamination Certificate
active
11491646
ABSTRACT:
Provided is an apparatus and method for simultaneous optical wavelength conversion and optical clock signal extraction using semiconductor optical amplifiers (SOAs). The apparatus includes: a wavelength converter receiving a pump beam having input information and a probe beam having a different wavelength from the pump beam, and outputting the pump beam with an overshoot shifted to a red wavelength and an undershoot shifted to a blue wavelength due to non-linear characteristics and self-phase modulation of semiconductor optical amplifiers (SOAs) and the probe beam delivered the input information from the pump beam; an optical divider dividing output paths of the probe beam to which the input information has been delivered and the pump beam having the overshoot and the undershoot; a converted-wavelength extractor filtering the probe beam received from the optical divider; and a clock data regenerator obtaining a pseudo return-to-zero (PRZ) signal from the pump beam received from the optical divider and extracting a clock signal from the PRZ signal.The apparatus and method can simultaneously perform wavelength conversion and optical clock signal extraction on an NRZ signal using an optical method, without converting the NRZ signal into an electrical signal.
REFERENCES:
patent: 6335819 (2002-01-01), Cho et al.
patent: 6636318 (2003-10-01), Sarathy et al.
patent: 6731873 (2004-05-01), Zuhdi et al.
patent: 7010235 (2006-03-01), Ueno
patent: 2002/0063944 (2002-05-01), Kim et al.
patent: 2002/0176157 (2002-11-01), Dave et al.
patent: 2003/0169473 (2003-09-01), Cotter et al.
patent: 2004/0212872 (2004-10-01), Auge et al.
patent: 2005/0259698 (2005-11-01), Park et al.
patent: 2004326087 (2004-11-01), None
Mao et al. All-Optical Clock Recovery From RZ-Format Data by Using a Two-Section Gain-Coupled DFB Laser. Journal of Lightwave Technology. vol. 20. No. 9. Sep. 2002.
Mao et al. All-Optical Enhancement of Clock and Clock-to-Data Suppression Ratio of NRZ Data. IEEE Photonics Technology Letters. vol. 13. No. 3. Mar. 2001.
All-Optical NRZ-to-PRZ Converter at 10 Gb/s Based on Self-Phase Modulation of Fabry-Perot Laser Diode. IEEE Photonics Technology Letters. vol. 16. No. 4. Apr. 2004.
Optical Signal Procssing Based on Self-Induced Polarization Rotation in A Semiconductor Optical Amplifier. Journal of Lightwave Technology. vol. 22. No. 2. Feb. 2004.
‘Simultaneous Clock Component Extraction and Wavelength Conversion of NRZ Signal Using an SOA Loop Mirror’ Hong et al., vol. 16, No. 4, Apr. 2004, 2004 IEEE, pp. 1116-1118, Photonics Technology Letters.
‘All-optical clock recovery from NRZ data with simple NRZ-to-PRZ converter based on self-phase modulation of semiconductor optical amplifier’ Lee et al., Electronic Letters, Jun. 10, 1999, vol. 35, No. 12, pp. 989-990.
Jeon Min Yong
Kim Dong Churl
Kim Sung Bock
Leem Young Ahn
Park Kyung Hyun
Electronics and Telecommunications Research Institute
Hughes Deandra M
Ladas & Parry LLP
LandOfFree
Apparatus and method for wavelength conversion and clock... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for wavelength conversion and clock..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for wavelength conversion and clock... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3843726