Abstract
We investigate synchronous upconversion of a pulsed, tunable quantum cascade laser (QCL) in the important 5.4–10.2 µm range, with a 30 kHz, Q-switched, 1064 nm laser. The possibility to accurately control the repetition rate and pulse duration of the QCL results in a good temporal overlap with the Q-switched laser, leading to an upconversion quantum efficiency of 16% in a 10 mm-long AgGaS2 crystal. We investigate the noise properties of the upconversion process in terms of pulse-to-pulse energy stability and timing jitter. For QCL pulses in the 30–70 ns range the upconverted pulse-to-pulse stability is approximately 1.75%. The demonstrated combination of broad tunability and high signal to noise in the system is well-suited for mid-IR spectral analysis of highly absorbing samples.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yu-Pei Tseng, Christian Pedersen, and Peter Tidemand-Lichtenberg
Opt. Mater. Express 8(5) 1313-1321 (2018)
Peter Tidemand-Lichtenberg and Christian Pedersen
Opt. Lett. 49(9) 2233-2236 (2024)
Michael G. Hansen, Evangelos Magoulakis, Qun-Feng Chen, Ingo Ernsting, and Stephan Schiller
Opt. Lett. 40(10) 2289-2292 (2015)