1. Hybrid Continuous-Wave Demodulating Multipixel Terahertz Imaging Systems
- Author
-
W. von Spiegel, Anselm Deninger, Fabian Friederich, Hartmut G. Roskos, Peter Haring Bolívar, Frank Lison, C. am Weg, Gunnar Spickermann, and Axel Roggenbuck
- Subjects
Physics ,Distributed feedback laser ,Radiation ,business.industry ,Terahertz radiation ,Physics::Medical Physics ,Far-infrared laser ,Detector ,Physics::Optics ,Condensed Matter Physics ,Laser ,Semiconductor laser theory ,law.invention ,Photomixing ,Optics ,law ,Optoelectronics ,Continuous wave ,Physics::Atomic Physics ,Electrical and Electronic Engineering ,business - Abstract
We present an electrooptic (EO) terahertz imaging technique providing a demodulating detector array for phase-sensitive multipixel terahertz detection. The terahertz radiation from a quartz-stabilized microelectronic emitter is mixed with the synchronized laser beat signal of a continuous-wave distributed-feedback diode laser pair. A fast laser current control loop provides stable phase locking between the terahertz emitter and the laser difference frequency, whereby a demodulating near-infrared photonic-mixer-device camera is used for depth-resolving EO terahertz imaging. Alternatively, a femtosecond laser is used for the EO read-out.
- Published
- 2010
- Full Text
- View/download PDF