Abstract
Optical frequency combs (OFCs) enable high resolution, sensitivity, and speed in spectroscopic measurements. An efficient way of generating an optical frequency comb in the mid-infrared (mid-IR) is the difference frequency generation (DFG) process, which involves the interaction of two input waves in a non-linear crystal, resulting in the generation of a third wave with a frequency that is the difference in frequency of the two input beams [1]. The classical way of extending the path of light-gas interaction in spectroscopic measurements, thus increasing the sensitivity, is to use multi-pass cells (MPC). However, MPCs have disadvantages related to the difficulty of aligning laser light into the cell or optical fringes. An alternative approach is to use the so-called antiresonant hollow-core fibres (ARHCF) [2]. ARHCFs are characterized by a wide low-loss transmission range in the mid-IR, high quality of the delivered beam, and their air core can be filled with the target gas sample, which makes them well suited for laser-based gas sensing.
© 2023 IEEE
PDF ArticleMore Like This
Piotr Jaworski, Fei Yu, Piotr Bojęś, Dakun Wu, Paweł Kozioł, Grzegorz Dudzik, Krzysztof Abramski, Meisong Liao, and Karol Krzempek
JTu2G.33 CLEO: Applications and Technology (CLEO:A&T) 2020
Piotr Jaworski, Grzegorz Dudzik, Paweł Kozioł, Pier J. Sazio, Walter Belardi, and Karol Krzempek
JW2A.6 Applied Industrial Spectroscopy (AIS) 2021
S. Markmann, M. Franckié, M. Bertrand, M. Shahmohammadi, A. Forrer, P. Jouy, M. Beck, J. Faist, and G. Scalari
ch_13_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2023