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AssigneeNorthrop Grumman Corporation
InventorsDennis M. Hall, Raymond K. DeLong, Donald G. Heflinger, Peter M. Tanner
Estimating the term…
An optical communication system (20) is provided for transmitting a multi-rate data signal between a transmitter (22) and a receiver (24) in a power efficient manner. The optical communication system (20) includes an optical source (32) that supplies an optical carrier signal; an encoder (44) that receives and encodes a data signal; an external phase modulator (42) that modulates the optical carrier signal with the encoded data signal, such that the modulator (42) varies the duty factor of the modulated optical signal based on the encoded data signal; and an optically saturated erbium doped fiber amplifier (36) that amplifies the modulated optical signal prior to transmission by the transmitter (22). In accordance with the present invention, the modulation scheme of the optical communication system (20) varies the duty cycle of the modulation to attain power efficiency during periods of low data demand. In an alternative modulation scheme, data bits are encoded using bi-phase mark encoding and are transmitted in variable-length blocks.
An optical communication system for transmitting a multi-rate data signal between a transmitter and a receiver, said data signal having a variable data rate, the transmitter comprising:
A method for transmitting a power efficient multi-rate data signal between a transmitter and a receiver in an optical communication system, said data signal having a variable data rate, comprising the steps of:
A method for transmitting a power efficient multi-rate data signal between a transmitter and a receiver in an optical communication system, said data signal having a variable data rate, comprising the steps of:
Dependencies are inferred from the claim text.