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US 8,045,862 B2Granted
Optical communication method and apparatus
AssigneeAlcatel Lucent
InventorsXiang Liu, Yikai Su, Xing Wei
Life of this patent
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Abstract
An optical amplification method and apparatus implemented using RZ-DPSK modulation or variants thereof and a deeply saturated semiconductor optical amplifier.
Claims5
A method comprising:
- generating a phase-shift keyed optical signal;
- and
- propagating the phase shift keyed optical signal through a semiconductor optical amplifier in deep saturation, wherein −4dBm<PIN<4dBm, such that an optical signal exhibiting a regulated, amplified optical power is produced;
- wherein the amplified optical power is regulated to a saturation output power such that ΔPOUT(dB)/ΔPIN(dB) of the optical amplifier is less than about 0.25, wherein POUT is the power of the optical signal output from the amplifier, and PIN is the power of the optical signal input into the amplifier.
1 more element
A method for optical limiting amplification comprising:
- inputting a phase-shift keyed optical signal having a data independent intensity profile into a semiconductor optical amplifier in a deep saturation regime wherein −4dBm<PIN<4dBm such that an optical signal exhibiting a regulated, amplified optical power is produced and output, wherein ΔPOUT(dB)/ΔPIN(dB) is less than 0.25, where POUT is the power of the optical signal output from the amplifier, and PIN is the power of the optical signal input into the amplifier.
An optical signal processor apparatus comprising:
- a semiconductor optical amplifier device adapted to operate in deep saturation wherein −4dBm<PIN<4dBm and to receive an RZ-DPSK optical signal having an amplitude-shift keyed optical label portion, such that the optical label portion of the signal is removed upon propagation through the semiconductor optical amplifier device;
- wherein ΔPOUT(dB)/ΔPIN(dB) is less than 0.25, where POUT is the power of the optical signal output from the amplifiers, and PIN is the power of the optical signal input into the amplifiers.
An optical communication system for transmitting multi-channel phase-shift keyed optical signals comprising:
- a plurality of semiconductor optical amplifiers,
- wherein the system is adapted to transmit the optical signals such that the plurality of semiconductor optical amplifiers operate in a deep saturation regime wherein −4dBm<PIN<4dBm so as to provide optical power equalization of a plurality of channels of the multi-channel optical signals,
- wherein ΔPOUT(dB)/ΔPIN(dB) is less than about 0.25, where POUT is the power of the optical signal output from the amplifiers, and PN is the power of the optical signal input into the amplifiers.
An apparatus comprising:
- a means for generating a phase-shift keyed optical signal;
- and
- a means for propagating the optical signal through a semiconductor optical amplifier in deep saturation wherein −4dBm<PIN<4dBm to regulate the amplified optical power;
- wherein ΔPOUT(dB)/ΔPIN(dB) is less than 0.25, where POUT is the power of the optical signal output from the amplifiers, and PIN is the power of the optical signal input into the amplifiers.
1 more element
Dependencies are inferred from the claim text.