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Proceedings Paper

Coherent THz light source based on photo-mixing with a UTC-PD and ASE-free tunable diode laser
Author(s): D. Fukuoka; K. Muro; K. Noda
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Paper Abstract

A terahertz (THz) photo-mixing with a THz wave photo-mixer module using a uni-traveling-carrier photodiode (UTCPD) and home-built 1 μm-band ASE-free tunable external-cavity diode lasers (ECDLs) provides a narrow-band (40 MHz) wide range (up to 4.5 THz) coherent tunable THz light source system. Obtained THz-waves reach 100 nW at 0.9 THz and 100 pW at 4.0 THz. The difference frequency between mixing lights can be tuned over 20 THz, and the frequency tuning has a resettability and an accuracy corresponding to the estimation error of FSR 270 MHz hollow-core etalon as a frequency calibrator, around 1 MHz/THz. Some of dips in the frequency dependence of THz-waves caused by water vaper absorption reach a noise floor of this system, so the dynamic range of this system is demonstrated at least 40 dB in power ratio.

Paper Details

Date Published: 25 February 2016
PDF: 7 pages
Proc. SPIE 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 974717 (25 February 2016); doi: 10.1117/12.2212737
Show Author Affiliations
D. Fukuoka, Spectra Quest Lab. Inc. (Japan)
K. Muro, Spectra Quest Lab. Inc. (Japan)
K. Noda, Oshima Prototype Engineering Co. (Japan)

Published in SPIE Proceedings Vol. 9747:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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