Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2005-11-08
2011-12-06
Pascal, Leslie (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S082000, C398S092000, C398S147000, C398S159000, C398S192000, C398S193000, C398S194000
Reexamination Certificate
active
08073334
ABSTRACT:
The present invention relates to an optical modulation method and optical modulation system of a wavelength locked Fabry Perot-Laser Diode (FP-LD) by injecting a broadband light source (BLS) using mutual injection of FP-LDs. More specifically, the present invention relates to a novel modulation technology which embodies a wavelength locked FP-LD capable of being used as an economic light source in an optical network based on a wavelength-division multiplexing passive optical network (WDM-PON). According to the present invention, a light modulation system is suggested comprising: BLS being constructed by mutual injection between two FP-LDs and an optical fiber being used for light transmission; first AWG for filtering light from a plurality of oscillation modes of the BLS into n group; n FP-LDs outputting wavelength locked light which is divided through the first AWG; an encoder being provided at a transmitting end of a subscriber to which the output from the first AWG is transmitted; a circulator outputting light which is inputted through the first AWG; second AWG de-multiplexing WDM signals from the first AWG into n group; and a decoder being provided at a receiving end to which the output from the second AWG is transmitted. Therefore, the present invention makes it possible to provide a more economic light source for WDM-PON subscribers by embodying a wavelength locked FP-LD by injecting a low-cost BLS.
REFERENCES:
patent: 5251054 (1993-10-01), Lynn
patent: 5600471 (1997-02-01), Hirohashi et al.
patent: 6469649 (2002-10-01), Helkey et al.
patent: 6470036 (2002-10-01), Bailey et al.
patent: 6674969 (2004-01-01), Ogusu
patent: 7092595 (2006-08-01), Sorin et al.
patent: 7415205 (2008-08-01), Shin et al.
patent: 2001/0004290 (2001-06-01), Lee et al.
patent: 2003/0002121 (2003-01-01), Miyamoto et al.
patent: 2003/0223761 (2003-12-01), Brown et al.
patent: 2004/0184805 (2004-09-01), Shin et al.
patent: 2004/0208208 (2004-10-01), Shin et al.
patent: 2006/0262324 (2006-11-01), Hays et al.
patent: 1394005 (2003-01-01), None
patent: 1 271 808 (2002-06-01), None
patent: 61-114624 (1986-06-01), None
patent: 06-252860 (1994-09-01), None
patent: 10-0325687 (2002-02-01), None
Choi, K.M. “Broadband Light Source by Mutually Injected FP-LDs” OECC/COIN 2004, Jan. 1, 2004, pp. 882-884, XP009126452.
PCT International Search Report for PCT/KR2005/003767, mailed Feb. 17, 2006, 2 pages.
PCT Written Opinion for PCT/KR2005/003767, mailed Feb. 17, 2006, 3 pages.
Shin, et al., “155 Mbit/s Transmission Using ASE-Injected Fabry-Perot Laser Diode in WDM-PON over 70img id="CUSTOM-CHARACTER-00001" he="3.13mm" wi="1.02mm" file="US08073334-20111206-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?0C Temperature Rage,” Electronics Letters, Sep. 4, 2003, vol. 39, No. 18, pp. 1331-1332.
Oh, Tae-Won et al., “Broadband Light Source for Wavelength-Division Multiple Access Passive Optical Network,” Dept. of Elec. Eng., Korea Adv. Institute of Science and Tech., and Novera Optics Korea, Inc. Nov. 29, 2007, OECC 2003.
Kazuko Kikuchi, “Effect of 1/f-Type FM Noise on Semiconductor-Laser Linewidth Residual in High-Power Limit”, IEEE Journal of Quantum Electronics, Apr. 1989, pp. 684-688.
PCT International Preliminary Report on Patentability for PCT Counterpart Application No. PCT/KR2005/003767, May 15, 2007, 4 pages.
Office Action for Counterpart EP Application No: 05820436.3, Mar. 28, 2011, 7 pages.
Office Action for counterpart Chinese Patent Application No. 200580038051.2, 4 pgs (Jul. 14, 2011).
Choi Ki-Man
Lee Chang-Hee
Blakely Sokoloff Taylor & Zafman LLP.
Korea Advanced Institute of Science and Technology
Pascal Leslie
LandOfFree
Optical modulation method and system in wavelength locked... 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 modulation method and system in wavelength locked..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical modulation method and system in wavelength locked... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4255335