Title :
Multi-pixel continuous-wave THz-imaging by electro-optic sampling using a photonic-mixer-device camera
Author :
Friederich, Fabian ; Spickermann, Gunnar ; Bolívar, Peter Haring ; Löffler, Torsten ; Roskos, Hartmut G.
Author_Institution :
Phys. Inst., Goethe Univ. Frankfurt am Main, Frankfurt am Main, Germany
Abstract :
We present a new approach, in which a time-of-flight (TOF) camera is used instead of a conventional CCD camera. The TOF camera is based on photonic-mixer-device (PMD) technology. Every pixel acts as a lock-in detector which allows measuring both amplitude and phase of a modulated light signal simultaneously, while suppressing the background light. Consequently, high-resolution images with low THz field amplitudes can be obtained within seconds. This technique measures both the amplitude and phase, and hence can be used in coherent imaging applications.
Keywords :
electro-optical modulation; image sensors; optical variables measurement; phase measurement; terahertz wave detectors; terahertz wave imaging; TOF camera; coherent imaging; electro-optic detection; electro-optic sampling; light signal modulation; lock-in detector; multipixel continuous-wave THz-imaging; photonic-mixer-device camera; time-of-flight camera; Amplitude modulation; Cameras; Charge coupled devices; Charge-coupled image sensors; Optical modulation; Phase detection; Phase measurement; Phase modulation; Photonics; Sampling methods;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5191924
