Coherent THz light source based on photo-mixing with a UTC-PD and ASE-free tunable diode laser

D. Fukuoka; K. Muro; K. Noda

doi:10.1117/12.2212737

25 February 2016 Coherent THz light source based on photo-mixing with a UTC-PD and ASE-free tunable diode laser

D. Fukuoka, K. Muro, K. Noda

Proceedings Volume 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX; 974717 (2016) https://doi.org/10.1117/12.2212737
Event: SPIE OPTO, 2016, San Francisco, California, United States

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.

Citation Download Citation

D. Fukuoka, K. Muro, and K. Noda "Coherent THz light source based on photo-mixing with a UTC-PD and ASE-free tunable diode laser", Proc. SPIE 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 974717 (25 February 2016); https://doi.org/10.1117/12.2212737

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