Our group develops groundbreaking techniques for producing mid-IR and terahertz coherent radiation and explores their diverse applications. The areas of research embrace generation of ultra-broadband frequency combs in the mid-IR and THz and study of their coherence properties, Fourier-domain mid-IR spectroscopy including dual-comb spectroscopy, ultrasensitive molecular detection, spectroscopic study of dynamic processes (e.g. combustion), and nano-IR spectroscopy. We also explore supercontinuum generation in fibers and waveguides, photonic THz wave generation, THz imaging via up-conversion, as well as applications of lasers and frequency combs for bio-medical research.
M.N. Polyanskiy, I.V. Pogorelsky, M. Babzien, R. Kupfer, K.L. Vodopyanov and M.A. Palmer "Post-compression of long-wave infrared 2 picosecond sub-terawatt pulses in bulk materials" Optics Express, 29(20), pp. 31714-31725 (2021)
M.N. Polyanskiy, M. Babzien, I.V. Pogorelsky, R. Kupfer, K.L. Vodopyanov and M.A. Palmer "Single-shot measurement of the nonlinear refractive index of air at 9.2 mu m with a picosecond terawatt CO2 laser" Optics Letters, 46(9), pp. 2067-2070 (2021)
Q. Ru, T. Kawamori, P.G. Schunemann, S. Vasilyev, S.B. Mirov and K.L. Vodopyanov "Two-octave-wide (3 2 mu m) subharmonic produced in a minimally dispersive optical parametric oscillator cavity" Optics Letters, 46(4), pp. 709-712 (2021)
E.V. Karlovets, I.E. Gordon, D. Konnov, A.V. Muraviev and K.L. Vodopyanov "Dual-comb laser spectroscopy of CS2 near 4.6 mu m" Journal of Quantitative Spectroscopy & Radiative Transfer, 256, A. 107269 (2020)
Z.E. Loparo, E. Ninnemann, Q.T. Ru, K.L. Vodopyanov, and S.S. Vasu "Broadband mid-infrared optical parametric oscillator for dynamic high-temperature multi-species measurements in reacting systems" Optics Letters, 45(2), pp. 491-494 (2020)
D. Martyshkin, V. Fedorov, T. Kesterson, S. Vasilyev, H.R. Gu, J.Q. Liu, W.L. Weng, K.L. Vodopyanov, T.J. Kippenberg, and S. Mirov "Visible-near-middle infrared spanning supercontinuum generation in a silicon nitride (Si3N4) waveguide" Optical Materials Express, 9(6), pp. 2553-2559 (2019)
T. Kawamori, Q. Ru, and K.L. Vodopyanov "Comprehensive model for randomly phase-matched frequency conversion in zinc-blende polycrystals and experimental results for ZnSe" Physical Review Applied, 11, 054015 (2019)
S. Vasilyev, I. Moskalev, V. Smolski, J. Peppers, M. Mirov, A. Muraviev, K.L. Vodopyanov, S. Mirov, and V. Gapontsev "Multi-octave visible to long-wave IR femtosecond continuum generated in Cr:ZnS-GaSe tandem" Optics Express, 27(11), pp. 16405-16413 (2019)
T. Tomberg, A. Muraviev, Q. Ru, and K.L. Vodopyanov "Background-free broadband absorption spectroscopy based on interferometric suppression with a sign-inverted waveform" Optica, 6(2), pp. 147-151 (2019)
S. Vasilyev, I.S. Moskalev, V.O. Smolski, J.M. Peppers, M. Mirov, A.V. Muraviev, Z. Zawilski, P.G. Schunemann, S.B. Mirov, K.L. Vodopyanov, and V.P. Gapontsev "Super-octave longwave mid-infrared coherent transients produced by optical rectification of few-cycle 2.5-mu m pulses" Optica, 6(1), pp. 111-114 (2019)
V. Smolski, S. Vasilyev, I. Moskalev, M. Mirov, Q. Ru, A. Muraviev, P. Schunemann, S. Mirov, V. Gapontev, and K.L. Vodopyanov "Half-Watt average power femtosecond source spanning 3-8 A mu m based on subharmonic generation in GaAs" Applied Physics B-Lasers and Optics, 124(6), pp. 101 (2018)
A.V. Muraviev, V.O. Smolski, Z. E. Loparo, and K.L. Vodopyanov "Massively parallel sensing of trace molecules and their isotopologues with broadband subharmonic mid-infrared frequency combs" Nature Photonics, 12(4), pp. 209-215 (2018)
Z.E. Loparo, J.G. Lopez, S. Neupane, W.P. Partridge Jr., K.L. Vodopyanov, and S.S. Vasu "Fuel-rich n-heptane oxidation: A shock tube and laser absorption study" Combustion and Flame 185, pp. 220–233 (2017)
Q. Ru, Z. E. Loparo, X. Zhang, S. Crystal, S.S. Vasu, P. G. Schunemann, and K.L. Vodopyanov "Self-referenced octave-wide subharmonic GaP optical parametric oscillator centered at 3 µm and pumped by an Er-fiber laser" Optics Letters, 42(1), pp. 4756-4759 (2017)
F. Gou, F. Peng, Q. Ru, Y.-H. Lee, H. Chen, Z. He, T. Zhan, K.L. Vodopyanov, and S.T. Wu "Mid-wave infrared beam steering based on high-efficiency liquid crystal diffractive waveplates" Optics Express, 25(19), pp. 22404-22410 (2017)more...