17920592. Self-Coherent Optical Transmission System and Receiver simplified abstract (Telefonaktiebolaget LM Ericsson (publ))
Self-Coherent Optical Transmission System and Receiver
Organization Name
Telefonaktiebolaget LM Ericsson (publ)
Inventor(s)
Self-Coherent Optical Transmission System and Receiver - A simplified explanation of the abstract
This abstract first appeared for US patent application 17920592 titled 'Self-Coherent Optical Transmission System and Receiver
Simplified Explanation
The abstract describes an optical receiver system that includes a polarisation controller, optical filter apparatus, and coherent optical receiver apparatus. The polarisation controller receives a modulated optical signal and an unmodulated optical carrier signal with aligned polarisation. The optical filter apparatus separates the unmodulated optical carrier signal from the modulated optical signal. The coherent optical receiver apparatus performs coherent detection of the modulated optical signal using the unmodulated optical carrier signal as a local oscillator.
- The system includes a polarisation controller that aligns the polarisation of the modulated optical signal and the unmodulated optical carrier signal.
- An optical filter apparatus separates the unmodulated optical carrier signal from the modulated optical signal.
- The coherent optical receiver apparatus performs coherent detection of the modulated optical signal using the unmodulated optical carrier signal as a local oscillator.
Potential Applications
- Optical communication systems
- Fiber optic networks
- Coherent optical receivers
Problems Solved
- Efficient separation of modulated optical signals from unmodulated optical carrier signals
- Coherent detection of modulated optical signals
Benefits
- Improved signal detection and demodulation in optical communication systems
- Enhanced performance and reliability of fiber optic networks
- Higher data transmission rates and improved signal quality
Original Abstract Submitted
An optical receiver () comprising: a polarisation controller () arranged to receive as its input a first modulated optical signal having a first polarisation and an unmodulated optical carrier signal polarisation aligned with the first modulated optical signal, the first modulated optical signal having negligible spectral power density within a predetermined bandwidth, BW, around an optical spectrum of the unmodulated optical carrier signal; optical filter apparatus () having a main polarisation mode; and coherent optical receiver apparatus (), wherein the polarisation controller is arranged to apply polarisation rotations to the first modulated optical signal and the unmodulated optical carrier signal such that their polarisation is aligned to the main polarisation mode of the optical filter apparatus, the optical filter apparatus is arranged to receive and separate the unmodulated optical carrier signal from the first modulated optical signal, and the coherent optical receiver apparatus is arranged to receive said separated signals and perform coherent detection of the first modulated optical signal using as a local oscillator, LO, signal the unmodulated optical carrier signal.
