Wideband Single Sideband Modulation of Optical Carriers

Abstract

The wideband single-sideband modulator generates single-sideband (SSB) modulation with suppressed carrier utilizing traveling-wave LiNbO3 modulators in a Sagnac loop. In the wideband single-sideband modulator, optical light from a linearly-polarized source is injected into polarization-maintaining fiber (PolMF) where it is split equally via a Polarization-maintaining (PolM) directional fiber coupler, resulting in counterpropagating lightwaves in a Sagnac loop. These counterpropagating waves are II/2 out of phase due to the action of the coupler and remain so when they return to the coupler because they travel equal distances around the loop. Because the coupler is a reciprocal device, if the waves return to the coupler with equal amplitudes, they will recombine and exit the original port toward the polarized light source. The technique achieves true carrier cancellation over a range of V radio' frequency (RF) power levels, thereby serving as an enabling architecture for photonically-remoted ultrawide-band single- sideband suppressed-carrier (SSB-SC) modulated links.

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Document Details

Document Type
Technical Report
Publication Date
Feb 23, 2000
Accession Number
ADD019905

Entities

People

  • Lee T. Nichols
  • Ronald D. Esman

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amplitude
  • Amplitude Modulation
  • Amplitude Modulators
  • Cancellation
  • Directional
  • Electro-Optic Modulators
  • Frequency
  • Light Sources
  • Modulation
  • Modulators
  • Optical Modulators
  • Phase Modulators
  • Power Levels
  • Radio Frequency
  • Single Sideband Modulation
  • Traveling Waves
  • Waveguides

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Radio communications and signal processing.