Uncooled MWIR & LWIR Imaging Using Non-Degenerate Two Photon Absorption with Custom InGaAsP Detector Arrays
Princeton Infrared Technologies, Inc. (PIRT) will team with University of California Irvine (UCI) to develop a room temperature imager with detectivity from 3 to 12 μm spanning the mid-wave infrared (MWIR) and longwave infrared (LWIR) spectral range using non-degenerate two-photon absorption. This novel detection strategy captures MWIR/LWIR images at high pixel densities, high sensitivity, and low noise without cooling. Currently, MWIR and LWIR imaging requires expensive low-bandgap semi-conducting materials, such as HgCdTe and InSb. Cooled cameras that are commonly used to cover the entire 3 to 12 μm spectrum have low pixel densities such as 128x128, precluding the use of high definition (HD) sampling for acquiring high quality videos for applications such as microscopy and hyperspectral imaging. In this program, the team will deliver a 1280x1024 resolution camera using a custom InxGa1xAsyP1-y array integrated with optics and high speed lasers that operate at room temperature to image light from 3 to 12 μm at video rates. The system will enable hyperspectral imaging at high rates as it can image a single wavelength in every frame. In addition, a pulse laser will enable three-dimensional thermal imaging through certain materials. Phase I will be a proof of concept. In Phase II the team will build a system that can be utilized by Air Force lab personnel in various applications.