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Proceedings Paper

Portable terahertz spectrometer with InP related semiconductor photonic devices
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Paper Abstract

We demonstrate several optical beating sources based on 1.55 μm photonic devices. Broadband antenna-integrated, low-temperature-grown (LTG) InGaAs photomixers for widely tunable continuous-wave THz generation and detection are also verified. The novel optical beat sources show a beat frequency tuning range from 0.3THz to over 1.34 THz. The dual-mode laser diode (DML) consists of one phase and two active sections. Micro-heaters are used to independently tune the wavelengths of the two DML laser modes. Broadband antenna-integrated, LTG InGaAs photomixers are used as THz wave generators and detectors. This use of 1.55 μm photonic devices could connect current THz and InP-based communication technologies because the well-developed InP-based optoelectronic technologies are already expected to enable the integration of tunable LD sources with other optical components such as semiconductor optical amplifiers (SOAs), electro-absorption modulators, and waveguide-type THz photomixers. As well as realizing an optical fibercoupled THz time-domain spectroscopy (TDS) system, we also successfully achieved continuous frequency tuning of the CW THz emissions. Our results show that photomixing using the photonic devices is a promising approach to realize compact, cost-effective, and portable THz spectrometer.

Paper Details

Date Published: 1 March 2012
PDF: 10 pages
Proc. SPIE 8261, Terahertz Technology and Applications V, 826103 (1 March 2012); doi: 10.1117/12.907629
Show Author Affiliations
Kyung Hyun Park, Electronics and Telecommunications Research Institute (Korea, Republic of)
Namje Kim, Electronics and Telecommunications Research Institute (Korea, Republic of)
Hyunsung Ko, Electronics and Telecommunications Research Institute (Korea, Republic of)
Han-Cheol Ryu, Electronics and Telecommunications Research Institute (Korea, Republic of)
Jung-Woo Park, Electronics and Telecommunications Research Institute (Korea, Republic of)
Sang-Pil Han, Electronics and Telecommunications Research Institute (Korea, Republic of)
Min Yong Jeon, Chungnam National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8261:
Terahertz Technology and Applications V
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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