Tunable diode lasers of lead-salt materials have been demonstrated to be a useful tool for trace gas analysis, high resolution spectroscopy and infrared astronomy studies. Only recently, applications such as optogalvanic spectroscopy, spectroscopy of molecules in solids and on surfaces, and industrial process control have been explored. This paper reviews the recent advances in tunable diode laser technology to achieve high temperature, single mode operation for these applications. The use of the molecular beam epitaxy technique for the fabrication of heterojunction structure, stripe geometry diode lasers will be emphasized.
Dale L. Partin,
"Overview Of Tunable Diode Laser Technology", Proc. SPIE 0461, New Lasers for Analytical & Industrial Chemistry, (23 May 1984); doi: 10.1117/12.941065; https://doi.org/10.1117/12.941065