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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Simple pulse compression scheme based on filtering self-phase modulation-broadened spectrum and its application in an
Yanfu Yang1, Caiyun Lou, Hongbo Zhou
1Department of Electronic Engineering, Tsinghua University, Beijing, China. yyf02@mails.tsinghua.edu.cn
Applied Optics
|September 20, 2006
Summary
This study introduces a simple pulse compression technique using nonlinear fiber optics. Offset filtering enhances compressed pulse quality, achieving a pedestal-free output and improving extinction ratios for optical communication systems.
Area of Science:
- Nonlinear Optics
- Optical Communications
- Fiber Optics
Background:
- Pulse compression is crucial for high-speed optical systems.
- Existing methods face challenges with pulse quality and complexity.
- Self-phase modulation (SPM) is a key nonlinear effect in optical fibers.
Purpose of the Study:
- To develop a simple and stable pulse compression scheme.
- To improve compressed pulse quality, specifically eliminating pulse pedestals.
- To enhance the pulse extinction ratio for better signal integrity.
Main Methods:
- Utilizing a highly nonlinear fiber (HNLF) for spectrum broadening via self-phase modulation.
- Implementing an offset filtering technique for spectral selection.
- Conducting experimental validation and numerical simulations.
- Integrating the compressed pulse train into a 4 x 10 Gbits/s optical time-division multiplexing (OTDM) system.
Main Results:
- Experimentally demonstrated a pedestal-free compressed pulse using offset filtering.
- Achieved superior pulse quality compared to center filtering.
- Numerical simulations indicated potential for improved pulse extinction ratio.
- Verified the high pulse quality through successful operation in a 40 Gbits/s OTDM system.
Conclusions:
- The proposed scheme offers a simple and stable method for pulse compression.
- Offset filtering is advantageous for producing high-quality, pedestal-free pulses.
- The technique shows promise for enhancing extinction ratios in optical signal processing.
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