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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Chromatic dispersion measurement using single sideband spectrum phase difference detection for OOK signal link
Bin Li1, Fengguang Luo, Weilin Zhou
1Wuhan National Laboratory for Optoeletronics, Wuhan, China.
Optics Express
|January 26, 2012
Summary
This study introduces a new method for measuring residual chromatic dispersion (CD) in fiber optic links. The single sideband spectrum phase difference technology accurately detects positive and negative CD, crucial for high-speed data transmission.
Area of Science:
- Optical Communications Engineering
- Photonics
- Telecommunications
Background:
- Chromatic dispersion (CD) is a critical parameter affecting signal integrity in high-speed fiber optic links.
- Accurate measurement of residual CD, including its sign, is essential for link performance optimization.
- Existing CD measurement techniques may have limitations in range, resolution, or applicability to different data rates.
Purpose of the Study:
- To theoretically and experimentally demonstrate a novel method for measuring residual chromatic dispersion (CD) in optical fiber links.
- To validate the capability of the proposed technology to differentiate between positive and negative CD.
- To assess the method's performance across different data rates and modulation formats.
Main Methods:
- Development and application of a novel single sideband (SSB) spectrum phase difference detection technology.
- Utilizing two local oscillator (LO) signals with adjustable frequency difference (FD).
- Experimental verification on 10 Gbit/s NRZ and 40 Gbit/s NRZ/RZ intensity modulation direct detection (IM/DD) links.
Main Results:
- Successful theoretical and experimental demonstration of residual CD measurement.
- The method accurately differentiates positive and negative residual CD.
- For a 10G NRZ link with 4 GHz FD, a measuring range of ±1000 ps/nm and resolution better than 5 ps/nm were achieved.
- The measurement technique is independent of the data rate for IM/DD links.
Conclusions:
- The novel SSB spectrum phase difference detection technology provides an effective solution for residual CD measurement.
- The method offers high accuracy, good resolution, and flexibility in measuring both positive and negative CD.
- This technology is suitable for various high-speed optical communication systems, independent of data rate.
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