IEEE Photonics Technology Letters · 2006 · 250 citations · 12 references
Natural SciencesPhysicsBiomedical ImagingOpticsPhotonicsDetector TechnologyImagingOptical DetectorsOptical ImagingTerahertz PhotonicsTerahertz SpectroscopyFocal Plane ArraysNoise Equivalent PowerOptical NoiseQuantum Cascade LasersReal-time ImagingTerahertz DetectorsTerahertz ImagingTerahertz Quantum Cascade Lasers
We report the use of a ~50-mW peak power 4.3-THz quantum cascade laser (QCL) as an illumination source for real-time imaging with a 320 times 240 element room-temperature microbolometer focal-plane array detector. The QCL is modulated synchronously with the focal-plane array for differential imaging. Signal-to-noise ratios of ~340 are achieved at a 20-frame/s acquisition rate, and the optical noise equivalent power of the detector array at 4.3 THz is estimated to be ~320 pW/radicHz. Both reflection and transmission mode imaging are demonstrated
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Engineering, Electrical Engineering, Condensed Matter Physics +16