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Related Experiment Video

Updated: Jul 5, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Approach to all-optical bipolar direct-sequence ultrawideband coding.

Qing Wang1, Jianping Yao

  • 1Microwave Photonics Research Laboratory, School of Information Technology and Engineering, University of Ottawa, ON K1N 6N5, Canada.

Optics Letters
|May 3, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces an all-optical method for bipolar direct-sequence ultrawideband (UWB) encoding using fiber Bragg gratings. This technique enables efficient UWB code generation for advanced communication systems.

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Quasi-light Storage for Optical Data Packets
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Last Updated: Jul 5, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

  • Optoelectronics
  • Optical Communications
  • Signal Processing

Background:

  • Ultrawideband (UWB) communication systems offer high data rates and spectral efficiency.
  • Optical encoding methods are crucial for high-speed signal processing in modern communication networks.
  • Bipolar codes are essential for advanced modulation and multiple access schemes.

Purpose of the Study:

  • To propose and demonstrate an all-optical approach for bipolar direct-sequence ultrawideband (UWB) encoding.
  • To utilize electro-optic modulation and fiber Bragg gratings (FBGs) for UWB code generation.
  • To enable efficient multiple access communications through optical UWB encoding.

Main Methods:

  • Employing electro-optic phase modulation and phase modulation to intensity modulation (PM-IM) conversion.
  • Utilizing a fiber Bragg grating (FBG) array as a multichannel frequency discriminator.
  • Generating bipolar UWB codes by positioning optical carriers on the slopes of FBG reflection spectra.

Main Results:

  • Successfully demonstrated an all-optical bipolar direct-sequence UWB encoding system.
  • Achieved UWB code generation with a code length of 4.
  • Validated the FBG array's capability to act as a frequency discriminator for UWB encoding.

Conclusions:

  • The proposed all-optical UWB encoding method is feasible and effective.
  • FBG-based optical signal processing offers a promising solution for high-speed UWB communications.
  • This approach facilitates the development of advanced optical multiple access communication systems.