Optical homodyne DPSK receiver with optical amplifier
AssigneeUniversity of Ottawa
InventorsMohsen Kavehrad, Mansour I. Irshid
Life of this patent
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Abstract
An optical homodyne differential phase shift keying (DPSK) receiver for receiving and demodulating optical input signals, is provided with a power splitter for splitting the input signal into first and second signals, a delay is applied to the second signal, an optical amplifier optically amplifies the delayed second signal, and a balanced noise reduction circuit combines the first signal and the delayed amplified second signal to produce a demodulated output signal.
Claims20
An optical homodyne differential phase shift keying receiver for receiving and demodulating optical signals, comprising:
- input means for receiving an optical signal;
- power splitting means for splitting said received optical signal into first and second signals, said first and second signals being transmitted away from said power splitting means on respective first and second optical paths;
- delay means in the second optical path for delaying said second signal to thereby produce a delayed second signal;
- optical amplifying means for receiving said delayed second signal and optically amplifying said delayed second signal to thereby produce a delayed amplified second signal;
- and
- balanced noise reduction circuit means for receiving said delayed amplified second signal from the optical amplifying means and said first signal from said power splitting means, and for combining said first signal and said delayed amplified second signal to produce a demodulated output signal.
An optical homodyne differential phase shift keying receiver for receiving and demodulating optical signals, includes:
- input means for receiving an optical signal and transmitting said signal to a power splitting means for splitting said signal into first and second signals, each of which is transmitted away from said power splitting means along a respective optical path;
- delay means in the path of said second signal, for delaying said second signal to thereby produce a delayed second signal;
- optical amplifying means in the path of said delayed second signal, for optically amplifying said delayed second signal;
- and
- balanced noise reduction circuit means receiving inputs from the paths of both said first signal and said delayed amplified second signal, for combining said first signal and said delayed amplified second signal to produce a demodulated output signal.
Dependencies are inferred from the claim text.