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Single-mode InGaAsSb/AlGaAsSb distributed feedback lasers for gas sensing
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View: Figures


Image of FIG. 1.
FIG. 1.

Total light output and voltage vs applied current for a DFB laser diode with uncoated facets in cw operation at . The inset shows the laser spectrum acquired at an injection current of 165 mA.

Image of FIG. 2.
FIG. 2.

Evolution of the DFB laser emission spectrum with increasing cw drive current at . The intensity is presented on a logarithmic scale (dB) in arbitrary units.

Image of FIG. 3.
FIG. 3.

Light intensity vs applied current measured after transmission through HF cell. The measurements were made for laser temperatures from 5 to in steps. (Inset) Variation in absorption dip current with laser diode temperature (symbols). The solid line is a guide for the eye.

Image of FIG. 4.
FIG. 4.

Absorption spectra with current obtained for laser temperatures 5 to in steps.

Image of FIG. 5.
FIG. 5.

TDLAS Absorption spectrum (symbols) obtained for laser temperature of compared with HiTran spectrum calculated for the same HF concentration and path length (solid line).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single-mode 2.4 μm InGaAsSb/AlGaAsSb distributed feedback lasers for gas sensing