Improvement of THz imaging

Author

Jiang, Z. ; Zhang, X.-C.

Author_Institution

Dept. of Phys., Appl. Phys., & Astron., Rensselaer Polytech. Inst., Troy, NY, USA

fYear

2000

fDate

7-12 May 2000

Firstpage

464

Lastpage

465

Abstract

Summary form only given. In contrast to the scanning THz imaging system, the speed of which is limited by the mechanical scanning, the CCD-based THz imaging system promises real-time two-dimensional (2D) imaging capability. However, because the lock-in amplifier that suppresses the noise greatly can not be used with the CCD imager, the CCD-based THz imaging system suffers from low signal-to-noise ratio (SNR). We adopt the principle of the lock-in detection in a CCD THz imaging system, the SNR is greatly improved. As an example, the 2D distribution of the relatively weak THz pulses generated by an optical rectification emitter is measured.

Keywords

CCD image sensors; infrared imaging; optical images; optical noise; optical pulse generation; real-time systems; rectification; 2D distribution; CCD imager; CCD-based THz imaging system; THz imaging; lock-in amplifier; lock-in detection; low signal-to-noise ratio; mechanical scanning; noise suppression; optical rectification emitter; pulse generation; real-time two-dimensional imaging capability; relatively weak THz pulse; scanning THz imaging system; Charge coupled devices; Low-noise amplifiers; Nonlinear optics; Optical amplifiers; Optical imaging; Optical pulse generation; Pulse measurements; Real time systems; Signal to noise ratio; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on

Conference_Location

San Francisco, CA, USA

Print_ISBN

1-55752-634-6

Type

conf

DOI

10.1109/CLEO.2000.907258

Filename

907258