BROWSE
Detail
Journal Article
Real-Time Continuous-Wave Terahertz Line Scanner Based on a Compact 1 × 240 InGaAs Schottky Barrier Diode Array Detector
- Authors
- Sang-Pil Han, Hyunsung Ko, Namje Kim, Won-Hui Lee, Kiwon Moon, Il-Min Lee, Eui Su Lee, Dong Hun Lee, Wangjoo Lee, Seong-Tae Han, Sung-Wook Choi, Kyung Hyun Park
- Issue Date
- 2014-12
- Citation
- Optics Express, v.22, no.23, pp.28977-28983
- ISSN
- 1094-4087
- Publisher
- Optical Society of America(OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- We demonstrate real-time continuous-wave terahertz (THz) line-scanned imaging based on a 1 × 240 InGaAs Schottky barrier diode (SBD) array detector with a scan velocity of 25 cm/s, a scan line length of 12 cm, and a pixel size of 0.5 × 0.5 mm2. Foreign substances, such as a paper clip with a spatial resolution of approximately 1 mm that is hidden under a cracker, are clearly detected by this THz line-scanning system. The system consists of the SBD array detector, a 200-GHz gyrotron source, a conveyor system, and several optical components such as a high-density polyethylene cylindrical lens, metal cylindrical mirror, and THz wire-grid polarizer. Using the THz polarizer, the signal-to-noise ratio of the SBD array detector improves because the quality of the source beam is enhanced.
- KSP Keywords
- Continuous-wave terahertz, Conveyor System, Cylindrical lens, Diode array detector, High-density polyethylene(HDPE), Pixel size, Real-Time, Scan line, Scanning System, Signal noise ratio(SNR), Signal-to-Noise
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
