Application of antimonide diode lasers in photoacoustic spectroscopy.

Ultrabroadband Solid-state Lasers in Trace Gas Sensing

Application of ultrabroadband Cr2+-doped mid-infrared lasers to sensitive molecular spectroscopy in the 2–3 μm wavelength range is demonstrated using two different techniques: scanning photoacoustic spectroscopy and intracavity absorption spectroscopy. It is shown, that the broad gain bandwidth is a crucial parameter, allowing multicomponent analysis and extreme sensitivity down to 10−5 mbar of...

Novel method for wavelength locking of tunable diode lasers based on photoacoustic spectroscopy

Novel Helmholtz-based photoacoustic sensor for trace gas detection at ppm level using GaInAsSb/GaAlAsSb DFB lasers.

A new and compact photoacoustic sensor for trace gas detection in the 2-2.5 microm atmospheric window is reported. Both the development of antimonide-based DFB lasers with singlemode emission in this spectral range and a novel design of photoacoustic cell adapted to the characteristics of these lasers are discussed. The laser fabrication was made in two steps. The structure was firstly grown by...

Spectroscopic gas analyzers based on indium-phosphide, antimonide and lead-salt diode-lasers.

Currently available semiconductor lasers for spectroscopy in the near- and mid-infrared region based on direct band-to-band transitions as gallium-arsenide, indium-phosphide, antimonides and lead-salt containing compounds will be discussed together with the main features of different tunable diode-laser absorption spectrometers for trace gas analysis. Measurements of atmospheric carbon dioxide ...

Tunable Diode Lasers (TDL) for Spectroscopy and Environmental Monitoring

The current status of III-V tunable diode lasers (TDLs) emitting between 1 -5pm wavelengths for spectroscopy and chemical analysis is described. Single mode distributed feedback (DFB) strained layer lnGaAs(P) lasers grown on lnP substrates with emission wavelength from 1.2 to 2.06 pm have been developed at JPL. DFB ridge waveguide lasers at 2,06pm have operated continuous wave (CW) up to 50°C w...