1
James E DeGrange Jr, Sridhar Balakrishnan: Method and system for controlling amplifier power in an optical communications network. Ciena Corporation, Michael R Cammarata, David A Fox, September 2, 2003: US06614589 (6 worldwide citation)

The invention includes a method for controlling amplifier output power in an optical communications network. A first transmission parameter is determined at a first amplifier. In an exemplary embodiment, the first transmission parameter is a composite express signal to noise ratio. The total output ...


2
Balakrishnan Sridhar, Clark Scrandis, James E DeGrange Jr, Michael G Taylor, Jun Bao: Three-stage optical amplifier having flat spectral gain. CIENA Corporation, Michael R Cammarata, May 31, 2005: US06900931 (5 worldwide citation)

A three stage optical amplifier is disclosed having a substantially flat gain profile. The amplifier includes a variable optical attenuator coupled between second and third stages of the amplifier and a dispersion compensating element. The attenuation of the optical attenuator is adjusted in accorda ...


3
James E DeGrange Jr: Method and system for coordinating and utilizing channel power information in an optical communications network. Ciena Corporation, Clements Wlaker, Christopher L Bernard, Tyler S Brown, July 10, 2007: US07242863 (4 worldwide citation)

A method of coordinating channel power information in a wavelength division multiplexed (WDM) optical communication system is disclosed. The method determines weighting values for each channel of the WDM signal based on channel launch powers. A source data object may used to transmit the channel wei ...


4
James E DeGrange Jr, Balakrishnan Sridhar: Power balanced optical add multiplexer and power balancing methods therefore. CIENA Corporation, Michael R Cammarata, June 7, 2005: US06904241 (4 worldwide citation)

To improve a power balance of an optical add multiplexer, an add amplifier is optically coupled to an add path of an optical add module. A through loss associated with a signal passing through the add module, and an add loss associated with a signal travelling an add path of the add module are known ...


5
James E DeGrange Jr, Sridhar Balakrishnan: Method and system for determining channel power in an optical communications network. Ciena Corporation, Michael R Cammarata, May 6, 2003: US06559985 (4 worldwide citation)

The invention includes a method for determining channel power in an optical communications network. The method includes determining at least one transmission parameter for a channel. Exemplary transmission parameters include transmission rate and transmission format. A number of channel units is det ...


6
James E DeGrange Jr, Balakrishnan Sridhar: Power balanced optical add/drop multiplexer and power balancing methods therefore. CIENA Corporation, Michael R Cammarata, April 26, 2005: US06885825 (1 worldwide citation)

To improve a power balance of an optical add/drop multiplexer, an add amplifier is optically coupled to an add path of an optical add/drop module. A through loss associated with a signal passing through the add/drop module, a drop loss associated with a signal travelling a drop path of the add/drop ...


7
James E DeGrange Jr, Sridhar Balakrishnan: Method and system for controlling amplifier power in an optical communications network having add/drop capability. Ciena Corporation, Michael R Cammarata, July 29, 2003: US06600596 (1 worldwide citation)

The invention includes a method for controlling amplifier output power in an optical communications network having channel add/drop capability. A first transmission parameter and a second transmission parameter are determined at a first amplifier. In an exemplary embodiment, the first transmission p ...


8
James E DeGrange Jr, Sridhar Balakrishnan: Method and system for controlling amplifier power in an optical communications network having add/drop capability. CIENA Corporation, Dougherty Clements, Christopher L Bernard, Tyler S Brown, July 25, 2006: US07081986

The invention includes a method for controlling amplifier output power in an optical communications network having channel add/drop capability. A first transmission parameter and a second transmission parameter are determined at a first amplifier. In an exemplary embodiment, the first transmission p ...