Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-05-02
2006-05-02
Keith, Jack (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S341410
Reexamination Certificate
active
07038841
ABSTRACT:
A method for realizing, in a fiber amplifier with three stages of amplifiers, automatic gain control in which a constant gain is obtained when channels are varied, and automatic level control in which a constant output per channel is obtained when a light power is varied because of variations in span loss. A light power or another light power of a specific wavelength is monitored to determine when variations in these light powers take place, current values of pump laser diodes appropriate for an input is read from a lookup table, and pump laser diodes are driven. During this operation, a pump power of the first stage amplifier is constantly maintained, and those of the second or third stage amplifier are controlled.
REFERENCES:
patent: 6178038 (2001-01-01), Taylor et al.
patent: 6396623 (2002-05-01), Wysocki et al.
patent: 6462862 (2002-10-01), Kinoshita
patent: 6466362 (2002-10-01), Friedrich
patent: 6476961 (2002-11-01), Ye et al.
patent: 6738184 (2004-05-01), Hayashi et al.
patent: 6785042 (2004-08-01), Onaka et al.
patent: 6888670 (2005-05-01), Oh et al.
patent: 2002/0054733 (2002-05-01), Kagi
patent: 2004/0001715 (2004-01-01), Katagiri et al.
patent: 2004/0252999 (2004-12-01), Onaka et al.
patent: 1033834 (1999-11-01), None
patent: 1187275 (2001-09-01), None
patent: 10-2000-0069263 (2000-11-01), None
patent: 1020020039447 (2002-05-01), None
16-Channel C-Band Hybrid Fiber Amplifier Comprising an EDFA and a Single Diode Laser Pumped Dispersion Compensating Raman Amplifier, 2 pages.
OSA Tops vol. 25, Optical Amplifiers and Their Applications, Douglas M. Baney, Katsumi Emura, and Jay M. Wiesenfeld (eds.), pp. 72-77.
Journal of Lightwave Technology, vol. 19, No. 11, Nov. 2001, pp. 1759-1767.
Smart EDFA with Embedded Control, pp. 419-420.
Chang Sun-Hyok
Chu Moo-Jung
Chung Hee-Sang
Han Jin-Soo
Kim Seung-Kwan
Blakely & Sokoloff, Taylor & Zafman
Bolda Eric
Electronics and Telecommunications Research Institute
Keith Jack
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