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Conference Paper
Portable Terahertz Spectrometer with InP Related Semiconductor Photonic Devices
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- Authors
- Kyung Hyun Park, Namje Kim, Hyunsung Ko, Han-Cheol Ryu, Jung-Woo Park, Sang-Pil Han, Min Yong Jeon
- Issue Date
- 2012-12
- Citation
- Terahertz Technology and Applications V (SPIE 8261), v.8261, pp.1-10
- Publisher
- SPIE
- Language
- English
- Type
- Conference 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. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
- KSP Keywords
- Broadband Antenna, Dual-mode laser, Electroabsorption modulator(EAM), Frequency tuning range, InP-based, Laser diode, Micro-heater, Optical Components, Optical instrumentation, Semiconductor optical amplifiers(SOAs), THz Spectrometer