Wavelength-Agile External-Cavity Diode Laser

A prototype wavelength-agile external-cavity diode laser (ECDL) was demonstrated in the first phase of a continuing effort to develop noninvasive laser-based instruments that would measure absolute concentrations of trace gases. As envisioned, these instruments would offer a combination of high sensitivity, versatility, large bandwidth, long-term stability, accuracy, and reliability - attributes that would make them attractive for use in research on combustion.