TY - JOUR
T1 - Low-threshold supercontinuum generation in polycrystalline media
AU - Vasilyev, Sergey
AU - Gu, Jiahui
AU - Mirov, Mike
AU - Barnakov, Yury
AU - Moskalev, Igor
AU - Smolski, Viktor
AU - Peppers, Jeremy
AU - Kolesik, Miroslav
AU - Mirov, Sergey
AU - Gapontsev, Valentin
N1 - Funding Information:
Acknowledgment. Authors Sergey Vasilyev and Jiahui Gu equally contributed to this study (its experimental and theoretical parts, respectively). Authors Jiahui Gu and Miroslav Kolesik acknowledge funding from the U.S. Army Research Laboratory (ARL) and the Air Force Office of Scientific Research (AFOSR). Author Sergey Mirov acknowledges funding from the National Institute of Environmental Health Sciences (NIEHS) and the Department of Energy (DOE). We thank Vladimir Fedorov and Dmitry Martyshkin, both with the University of Alabama at Birmingham, and Michelle Sander with Boston University for useful discussions.
Funding Information:
U.S. Department of Energy (DE-SC0018378); National Institute of Environmental Health Sciences (P42ES027723); Air Force Office of Scientific Research (FA9550-16-1-0121); Army Research Laboratory (W911NF1920192). Authors Sergey Vasilyev and Jiahui Gu equally contributed to this study (its experimental and theoretical parts, respectively). Authors Jiahui Gu and Miroslav Kolesik acknowledge funding from the U.S. Army Research Laboratory (ARL) and the Air Force Office of Scientific Research (AFOSR). Author Sergey Mirov acknowledges funding from the National Institute of Environmental Health Sciences (NIEHS) and the Department of Energy (DOE). We thank Vladimir Fedorov and Dmitry Martyshkin, both with the University of Alabama at Birmingham, and Michelle Sander with Boston University for useful discussions.
Publisher Copyright:
© 2021 Optical Society of America
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Until recently, the generation of super-octave continua in bulk materials at full repetition rates of femtosecond (fs) oscillators has been limited to a few special cases of Kerr lens mode-locked Ti:sapphire lasers. In 2019, we described a 3.4-octave fs source with 50 nJ pulse energy at the repetition rate of 78 MHz based on polycrystalline Cr:ZnS [Vasilyev et al., Optica6, 126 (2019)]. Here we explain the mechanism of fs supercontinuum generation in transition-metal doped polycrystalline II-VI semiconductors at relatively low (nJ-level) pulse energy. We demonstrate that this new supercontinuum regime is enabled by a complex, yet well-reproducible, interplay between the effects arising from the third-order nonlinearity, the quadratic nonlinearities, and thermal optical effects in the medium. We also demonstrate the control of fs pulse propagation in disordered χ(2) media via the control of the material microstructure.
AB - Until recently, the generation of super-octave continua in bulk materials at full repetition rates of femtosecond (fs) oscillators has been limited to a few special cases of Kerr lens mode-locked Ti:sapphire lasers. In 2019, we described a 3.4-octave fs source with 50 nJ pulse energy at the repetition rate of 78 MHz based on polycrystalline Cr:ZnS [Vasilyev et al., Optica6, 126 (2019)]. Here we explain the mechanism of fs supercontinuum generation in transition-metal doped polycrystalline II-VI semiconductors at relatively low (nJ-level) pulse energy. We demonstrate that this new supercontinuum regime is enabled by a complex, yet well-reproducible, interplay between the effects arising from the third-order nonlinearity, the quadratic nonlinearities, and thermal optical effects in the medium. We also demonstrate the control of fs pulse propagation in disordered χ(2) media via the control of the material microstructure.
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U2 - 10.1364/JOSAB.417485
DO - 10.1364/JOSAB.417485
M3 - Article
AN - SCOPUS:85105329070
SN - 0740-3224
VL - 38
SP - 1625
EP - 1633
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 5
ER -