1Formerly Scientist-G, Laser Science and Technology Centre, Defence Research and Development Organization (DRDO), Ministry of Defence, Metcalfe House, Delhi-110054, India
2Research Scientist, Photonics Group and Thin Films Lab, Indian Institute of Technology, Haus Khas, New Delhi-110016, India
3Professor, Maharaja Agrasen Institute of Technology, GGSIP University, Rohini, New Delhi-110086, India
4Former Visiting Professor, Netaji Subhas University of Technology, Formerly Netaji Subhas Institute of Technology, Dwarka, New Delhi-110078, India
Applications of the GaSb-based Type-I Diode Lasers for Gas Sensing and Air Pollutants Detection have been discussed in this paper. GaSb-based Type-I Diode Lasers Operating in the Optical Spectral Region ≥3μm are very useful for a variety of applications including trace gas sensing, free-space optical communications, and infrared countermeasures. Also, Tunable GaInAsSb/AlGaAsSb quantum well (QW) lasers grown by molecular beam epitaxy on GaSb substrates; and their GB, from 2.0 to 2.5 /dm, make them suitable for the detection of many gas species in the wavelength range, which corresponds to an atmospheric transmission window. Designing and synthesis of laser diodes of the desired modulated laser signal, is quite complicated technique, in the sense that un Mathematical and Characteristics considerations of Laser diodes are to be optimised, along with the consideration of their Parameters. The purpose of the present paper is to provide the technical analysis of the Modelling and Designing of these lasers for optimised results, besides giving a brief qualitative review of the recent important investigations on their novel applications. It is hoped that this paper should be really useful for the new researchers, and also the technologists in the field.
GaSb-based Type I diode lasers operating at ≥3μm, Broad area diode laser bars, Tapered diode laser bars, Detection of air pollutants
