• Detection of hazardous chemicals:  toxic gas, pollution, explosives, etc.
  • Monitoring of atmospheric pollution, industrial chimney, and greenhouse gas.
  • Detection and monitoring of a variety of gas emissions from various industrial processes, including in-line process monitoring and leak detection in critical areas.


Chemical Sensing

Chalcogenide fibers are well suited for chemical sensing applications since most molecular species vibrate in the infrared region.  The chalcogenide fibers can be used in fiber optic chemical sensor systems for quantitative remote detection and identification.  Examples of different sensing techniques include Quantum Cascade Laser (QCL) based molecular detection and imaging system, evanescent/ATR (attenuated total reflectance), diffuse reflectance and absorption spectroscopy.  The diffuse reflectance and evanescent/ATR techniques are useful for samples that scatter or are opaque at the mid

Biological and Chemical Agent Detection

The mid-infrared (2-10 µm) is the fingerprint region for most molecular species.  The development of mid-infrared fiber-optic lasers and broadband sources enable the development of chemical sensors for molecular spectroscopy, chemical process monitoring, and remote detection of chemical and biological agents.

Nonlinear Applications

Optical fibers made from chalcogenide glass exhibit large optical nonlinearities, which can be as large as 100 to 1000 times that of silica glass.  The high nonlinearities allow efficient supercontinuum generation enabling creation of broadband sources that can cover the near to mid-IR spectrum, efficient wavelength conversion through four-wave mixing, and creation fiber lasers and amplifiers in the mid-IR using their large Raman coefficient.  Using this phenomenon opens up the potential for compact and integrated all optical switches in civil, medical and military application.  These appl