Abstract

We demonstrate the possibility of nonlinear-optical detection of terahertz (THz) wave radiation without phase-locking between a source and a detector. Spectrally resolved room-temperature incoherent nonlinear-optical detection is demonstrated for 0.22-THz continuous wave (CW) radiation by upconversion using a 100-mW CW laser in a 15-mm-long $\mathrm{Mg}\text{:}{\mathrm{LiNbO}}_3$ crystal.

© 2016 Optical Society of America

Upconversion imaging using an all-fiber supercontinuum source

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