Among the numerous methods for gas analysis, Tunable Laser Absorption Apectroscopy (TLAS) excels e.g. in accuracy and speed, allowing real-time measurements with detection limits down to the ppb level. With the Interband Cascade Laser (ICL) approach, the entire wavelength range between 3 and 6 microns became commercially accessible in 2014. In this spectral region the fundamental absorption features of many technologically and industrially relevant gas species are located, including e.g. formaldehyde, nitric oxide as well as hydrocarbons like methane. In this talk we report on the newest developments of these application-grade Distributed FeedBack (DFB) lasers based on the ICL concept with tuning ranges above 20 nm, high sidemode suppression ratios and low power consumption. These laser devices enable high accuracy sensors for industrial process analysis as well as for applications related to health, safety and environment. In addition, we will give a general overview for the whole TLAS-field with special respect to low cost sensors.
Lars Hildebrandt is director of sales at nanoplus GmbH and has been working in the tunable semiconductor laser market since 1996, mainly in product development (external cavity diode laser and quantum cascade laser systems) and in sales and marketing. Hildebrandt holds a PhD in Physics, earned in 2004 from the University of Potsdam, Germany, working with blue external cavity diode lasers for atom spectroscopy and gas sensing. From 2005 through 2008 he was a project manager in the automotive industry for product innovation and introduction into series production. After gaining experience in this new business field, he returned to semiconductor lasers in 2009. Hildebrandt is now responsible for all sales activities for nanoplus tunable DFB lasers.