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Wavelength tunable coherent burst-mode receiver design under transient frequency offset
Optics Express
|October 10, 2013
Summary
A new optical coherent burst-mode receiver (BMR) design enables simultaneous dispersion compensation and frequency offset estimation. This flexible BMR supports dynamic WDM networks with minimal training, even with transient frequency shifts.
Area of Science:
- Optical Communications
- Signal Processing
- Telecommunications Network Engineering
Background:
- Dynamic Wavelength Division Multiplexing (WDM) networks require flexible optical receivers.
- Existing receivers face challenges in compensating for dispersion and estimating frequency offsets simultaneously.
- Burst-mode receivers (BMR) offer potential for dynamic network adaptability.
Purpose of the Study:
- To propose and evaluate a novel wavelength-tunable optical coherent burst-mode receiver (BMR).
- To achieve simultaneous dispersion compensation and frequency offset estimation within the BMR.
- To enhance the performance and flexibility of dynamic WDM networks.
Main Methods:
- A new BMR design incorporating a dispersion equalizer and a frequency offset estimator.
- Extensive performance verification through simulations.
- Analysis of the required training sequence length for initialization.
Main Results:
- The proposed BMR design effectively performs simultaneous dispersion compensation and frequency offset estimation.
- A short training sequence (4 K symbols, 160 ns) is sufficient for 200 km transmission.
- The BMR demonstrates robustness against frequency offsets up to ± 5 GHz.
- The design functions correctly even with transient frequency offsets from wavelength tuning.
Conclusions:
- The novel BMR design offers a viable solution for flexible and efficient optical network operation.
- The BMR provides sub-wavelength granularity and adaptability for dynamic WDM systems.
- The demonstrated performance validates the BMR's capability for robust optical signal reception.
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