Optical communication system having dynamic gain equalization

Details Optical communication system having dynamic gain equalization Optical communication system having dynamic gain equalization

2006-07-11

2006-07-11

Hughes, Deandra M. (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C398S067000

Reexamination Certificate

active

07075711

ABSTRACT:
An optical communication device, and related method, are provided for reducing ripple in WDM systems. In particular, the optical communication device includes a dynamic gain equalization (DGE) circuit is coupled to an optical communication path carrying the WDM optical signals. The DGE circuit adjusts the powers associated with each channel on a channel-by-channel basis so that the WDM optical signal has a desired power spectrum. The DGE is controlled in response to sense signals generated by an optical performance monitoring (OPM) circuit located downstream from the DGE or substantially co-located with the DGE. The OPM monitors the WDM spectrum for optical signal power variations and outputs the sense signal when the variations fall outside a given tolerance. Typically, one DGE is associated with a group of concatenated amplifiers so that multiple DGEs are provided in a system having many groups of such amplifiers. Likewise, multiple OPMs are provided in such systems, each corresponding to a respective DGE, so that ripple can be reduced and desired WDM optical signal powers can be achieved in the WDM system.

REFERENCES:
patent: 5986782 (1999-11-01), Alexander et al.
patent: 6271945 (2001-08-01), Terahara
patent: 6278536 (2001-08-01), Kai et al.
patent: 6307986 (2001-10-01), Duerksen et al.
patent: 6429962 (2002-08-01), Xu et al.
patent: 6580551 (2003-06-01), Terahara
patent: 6614589 (2003-09-01), DeGrange et al.
patent: 6621621 (2003-09-01), Jones et al.
patent: 6621625 (2003-09-01), Zhang et al.
patent: 6771905 (2004-08-01), Bortz
patent: 2001/0048545 (2001-12-01), Shimojoh
patent: 2001/0055133 (2001-12-01), Yamaguchi et al.
patent: 2002/0041433 (2002-04-01), Terahara
patent: 2002/0186432 (2002-12-01), Roorda et al.
Hiromu Toba, et al., “A 100-Channel Optical FDM Six-Stage In-Line Amplifier System Employing Tunable Gain Equalizers,” IEEE Photonics Technology Letters, vol. 5, No. 2, Feb., 1993, pps 248-251.
M. Birk, et al., “System Margin Enhancement in Terabit Capacity 40Gb/s Systems Using an Integrated EDFA with Dynamic Gain Equalizer,” OFC 2002, Mar., 2002, pps. 755-756.
J.L. Zyskind, et al., “High Capacity, Ultra-Long Haul Transmission,” Proc. NFOEC 2000.
S.F. Su, et al., Gain Equalization in Multiwavelength Lightwave Systems Using Acoustoopic Tunable Filters, IEEE Photonics Technology Letters, vol. 4, No. 3, Mar. 1992, pps. 269-271.
A.R. Pratt et al., Marconi, Coventry, UK: “5, 745 km DWM Transcontinental Field Trial Using 10 Gbit/s Dispersion managed Solitons and Dynamic Gain Equalization,” pps. PD26-1 to PD26-3.
Heather Patrick, Optinel Systems, Inc. USA: “Gain and Power Equalization,” OFC 2003, Tuesday Afternoon, vol. 1, pps 244.

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