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Photonic Generation of Triangular-shaped Waveform Based on External Modulation.

Jin Yuan1, Tigang Ning2, Jing Li1

  • 1Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing, 100044, China.

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|February 22, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for generating triangular waveforms using optical single sideband (OSSB) and optical carrier suppression (OCS) modulation. The technique precisely controls optical components to achieve the desired waveform shape.

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Area of Science:

  • Photonics and Optical Engineering
  • Signal Processing
  • Waveform Generation

Background:

  • Traditional waveform generation methods can be complex and limited in flexibility.
  • Optical modulation techniques offer high-speed and precise signal manipulation.

Purpose of the Study:

  • To develop a novel and efficient method for generating triangular-shaped waveforms.
  • To explore the application of optical single sideband (OSSB) and optical carrier suppression (OCS) modulation for waveform synthesis.

Main Methods:

  • Generation of an OSSB modulated signal with controlled carrier and sideband power ratio using a dual-drive Mach-Zehnder modulator (DD-MZM1).
  • Application of OCS modulation using a second DD-MZM (DD-MZM2) driven by a fundamental frequency.
  • Utilizing a fiber Bragg grating (FBG) to filter out unwanted sidebands and achieve the final triangular waveform.

Main Results:

  • Successfully generated a triangular-shaped waveform by combining OSSB and OCS modulation techniques.
  • Demonstrated precise control over the optical spectrum to isolate desired spectral components.
  • Achieved a specific power ratio (19 dB) between the optical carrier and +1st-order sideband in the initial OSSB modulation stage.

Conclusions:

  • The proposed optical modulation approach provides an effective method for triangular waveform generation.
  • This technique offers a novel pathway for advanced optical signal processing and waveform synthesis.