Hybrid Continuous-Wave Demodulating Multipixel Terahertz Imaging Systems

Author

Friederich, Fabian ; Spickermann, Gunnar ; Roggenbuck, Axel ; Deninger, Anselm ; Weg, Christian Am ; Von Spiegel, Wolff ; Lison, Frank ; Bolívar, Peter Haring ; Roskos, Hartmut G.

Author_Institution

Phys. Inst., Goethe Univ., Frankfurt, Germany

Volume

58

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2022

Lastpage

2026

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.

Keywords

distributed feedback lasers; electro-optical devices; semiconductor lasers; terahertz wave imaging; demodulating detector array; demodulating multipixel; distributed-feedback diode laser pair; electrooptic terahertz imaging; femtosecond laser; hybrid continuous-wave; synchronized laser beat signal; terahertz imaging systems; terahertz radiation; Demodulating detector array; electrooptic (EO) terahertz detection; laser synchronization; photonic-mixer device; terahertz imaging;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2010.2050390

Filename

5484701