Frequency Stabilization of a Single Mode Terahertz Quantum Cascade Laser to the Kilohertz Level

Abstract

A simple analog locking circuit was shown to stabilize the beat signal between a 2.408 THz quantum cascade laser and a CH2DOH THz CO2 optically pumped molecular laser to 3-4 kHz (FWHM). This is approximately a tenth of the observed long-term (t ~ sec) linewidth of the optically pumped laser showing that the feedback loop corrects for much of the mechanical and acoustic-induced frequency jitter of the gas laser. The achieved stability should be sufficient to enable the use of THz quantum cascade lasers as transmitters in short-range coherent transceivers.

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Document Details

Document Type
Technical Report
Publication Date
Apr 27, 2009
Accession Number
ADA507781

Entities

People

  • Andrew J. Gatesman
  • Andriy A. Danylov
  • Jerry Waldman
  • Michael J. Coulombe
  • Robert H. Giles
  • Thomas M. Goyette
  • William D. Goodhue
  • William E. Nixon
  • Xifeng Qian

Organizations

  • University of Massachusetts Lowell

Tags

Communities of Interest

  • Advanced Electronics
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplifiers
  • Bandpass Filters
  • Bandwidth
  • Beat Signals
  • Frequency
  • Frequency Shift
  • Gas Lasers
  • Laser Beams
  • Lasers
  • Local Oscillators
  • Measurement
  • Optics
  • Quantum Cascade Lasers
  • Radiation
  • Terahertz Radiation
  • Time Intervals
  • Transmitters

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Radio communications and signal processing.

Technology Areas

  • Directed Energy
  • Quantum Computing