Continuous-wave THz homodyne spectroscopy and imaging system with electro-optical phase modulation for high dynamic range
SCIE
SCOPUS
- Title
- Continuous-wave THz homodyne spectroscopy and imaging system with electro-optical phase modulation for high dynamic range
- Authors
- Kim, JY; Song, HJ; Ajito, K; Yaita, M; Kukutsu, N
- Date Issued
- 2013-03
- Publisher
- IEEE Trans. Terahertz Science and Technology
- Abstract
- We present a terahertz (THz) continuous-wave coherent homodyne spectroscopy and imaging system based on THz phase control using electrooptic (EO) phase modulation for fast measurement without mechanical delay movement. After describing the degradation effects of detection signal by the optical laser noise and parasitic amplitude modulation, we propose the push-pull EO phase modulation with optical delay control for dynamic range enhancement. Using wideband unitraveling-carrier photodiode and InGaAs photoconductive antenna, spectroscopy up to a 1.5-THz frequency range and imaging are demonstrated.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37347
- DOI
- 10.1109/TTHZ.2012.2228896
- ISSN
- 2156-342X
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, vol. 3, no. 2, page. 158 - 164, 2013-03
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