Doppler Asymmetric Spatial Heterodyne Spectroscopy (DASH): Concept and Experimental Demonstration

Abstract

We describe the concept of Doppler asymmetric spatial heterodyne spectroscopy (DASH) and present a laboratory Doppler-shift measurement using an infrared laser line. DASH is a modification of spatial heterodyne spectroscopy optimized for high precision, high accuracy Doppler-shift measurements of atmospheric emission lines either from the ground or a satellite. We discuss DASH design considerations, field widening, thermal stability and tracking, noise propagation, advantages, and trade-offs. DASH interferometers do not require moving optical parts and can be built in rugged, compact packages, making them suitable for space flight and mobile ground instrumentation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 10, 2007
Accession Number
ADA481185

Entities

People

  • Christoph R Englert
  • David D. Babcock
  • John M. Harlander

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Data Analysis
  • Detectors
  • Doppler Effect
  • Frequency
  • Interferometers
  • Laser Beams
  • Laser Diodes
  • Lasers
  • Measurement
  • Michelson Interferometers
  • Optical Fibers
  • Phase Shift
  • Space Sciences
  • Spectra
  • Spectral Lines
  • Spectroscopy
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy
  • Space