Optical transceivers for use in fiber optic communication networks
AssigneeCiena Corporation
InventorsVladimir S. Grigoryan, Michael Y. Frankel, Michael J. Wingrove
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Abstract
The present disclosure provides a polarization multiplexed transceiver, including: a transmitter; a receiver; circuitry within the transmitter configured to insert pilot tones as a reference state of polarization for a polarization multiplexed signal; and circuitry within the receiver configured to de-multiplex the polarization multiplexed signal using the pilot tones. The transmitted signal is constructed in such a manner as to facilitate the division of the receiver processing between the analog and digital domains such that the implementation may be simultaneously both highly spectrally efficient and power efficient.
Claims20
A polarization multiplexed optical system, comprising:
- a transmitter configured to transmit a polarization multiplexed signal and to insert a pilot tone as a state of polarization reference for the polarization multiplexed signal;
- and
- a receiver communicatively coupled to the transmitter and configured to extract the pilot tone and correspondingly detect the polarization multiplexed signal based on the extracted pilot tone;
- wherein detecting the polarization multiplexed signal based on the extracted pilot tone comprises extracting X and Y components of each of a vertically polarized and horizontally polarized pilot tone, with the X and Y components being polarization axes of a polarization beam splitter at the receiver, and processing the X and Y components, each being low speed signals, with a low speed interpolator digital signal processing block.
A polarization multiplexed optical method, comprising:
- inserting a pilot tone as a state of polarization reference for a polarization multiplexed signal;
- transmitting the polarization multiplexed signal with the pilot tone;
- receiving the polarization multiplexed signal with the pilot tone;
- and
- detecting the polarization multiplexed signal using the pilot tone;
- wherein detecting the polarization multiplexed signal using the pilot tone comprises extracting X and Y components of each of a vertically polarized and horizontally polarized pilot tone, with the X and Y components being polarization axes of a polarization beam splitter at the receiver, and processing the X and Y components, each being low speed signals, with a low speed interpolator digital signal processing block.
A polarization multiplexed transceiver, comprising:
- a transmitter;
- a receiver;
- circuitry within the transmitter configured to insert a pilot tone as a state of polarization reference for a polarization multiplexed signal;
- and
- circuitry within the receiver configured to detect the polarization multiplexed signal using the pilot tone;
- wherein the circuitry within the receiver is configured to detect the polarization multiplexed signal using the pilot tone by extracting X and Y components of each of a vertically polarized and horizontally polarized pilot tone, with the X and Y components being polarization axes of a polarization beam splitter at the receiver, and process the X and Y components, each being low speed signals, with a low speed interpolator digital signal processing block.
Dependencies are inferred from the claim text.