Solid state devices have ignited revolution after revolution in modern sciences and technologies, e.g. transistors in integrated circuitry, semiconductor lasers and detectors in the telecommunication, entertainment and lighting industries. Now, quantum cascade lasers are knocking at the door of traditional Infrared spectroscopy community, which have been using black body lamps for over a century.

- LIDAR using FM spectroscopy, Isotope NDIR, we are developing sensors that could are setting a record in sensing distance using FM spectroscopy technique
- Inelastic scattering: RAMAN, LIF, we are developing several setups for high temperature and pressure RAMAN and LIF sensing.

- Elastic Scattering: Mie/Rayleigh, OCT, we are developing multicolor lasers and novel setups for improved non-intrusive sensing on particulates and submerged tissues.

- Such sensors are low cost and easy to manufacture, but suffers from baseline drift and slow response.
- At PEER, we are developing novel "sniffing" schemes coupled with MEMS technology to remove the drift problem and improve response time.