Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers

Sylwester Latkowski, Ramón Maldonado-Basilio, Kevin Carney, Josué Parra-Cetina, Séverine Philippe, Pascal Landais

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

An all-optical heterodyne approach based on a room-temperature controlled semiconductor optical amplifier (SOA) for measuring the frequency and linewidth of the terahertz beat-tone signal from a passively mode-locked laser is proposed. Under the injection of two external cavity lasers, the SOA acts as a local oscillator at their detuning frequency and also as an optical frequency mixer whose inputs are the self-modulated spectrum of the device under test and the two laser beams. Frequency and linewidth of the intermediate frequency signal (and therefore, the beat-tone signal) are resolved by using a photodiode and an electrical spectrum analyzer.
Original languageEnglish
Article number081113
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number8
DOIs
Publication statusPublished - 1 Aug 2010
Externally publishedYes

Keywords

  • frequency measurement
  • heterodyne detection
  • laser mode locking
  • laser variables measurement
  • remote sensing by laser beam
  • semiconductor optical amplifiers
  • spectral line breadth
  • terahertz wave detectors
  • Modulation tuning and mode locking
  • Semiconductor lasers
  • laser diodes
  • Time and frequency
  • Submillimeter wave microwave and radiowave spectrometers
  • magnetic resonance spectrometers auxiliary equipment and techniques
  • Efficiency stability gain and other operational parameters
  • Beam characteristics: profile intensity and power
  • spatial pattern formation

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