Low photon energy of mid-infrared radiation supports generation of non-equilibrium free-carrier plasma in transparent optical materials via nonlinear absorption and associated inter-band electron excitation. The collision rate of the plasma may be low so that the free carriers experience from zero to very few collisions per electron per pulse for pulses shorter than 200 fs. Those features of the free-carrier plasma support specific mechanisms of light absorption. We consider solid-state analogs of the Brunel absorption at interfaces, Landau damping, and nonlinear absorption by free-carrier stimulated inverse bremsstrahlung. Parametric scaling of those mechanisms is compared against that of the traditional models.
{"title":"Specific mechanisms of bulk and surface absorption of ultrashort mid-infrared laser pulses in optical materials","authors":"V. Gruzdev","doi":"10.1117/12.2603324","DOIUrl":"https://doi.org/10.1117/12.2603324","url":null,"abstract":"Low photon energy of mid-infrared radiation supports generation of non-equilibrium free-carrier plasma in transparent optical materials via nonlinear absorption and associated inter-band electron excitation. The collision rate of the plasma may be low so that the free carriers experience from zero to very few collisions per electron per pulse for pulses shorter than 200 fs. Those features of the free-carrier plasma support specific mechanisms of light absorption. We consider solid-state analogs of the Brunel absorption at interfaces, Landau damping, and nonlinear absorption by free-carrier stimulated inverse bremsstrahlung. Parametric scaling of those mechanisms is compared against that of the traditional models.","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133412144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mid-IR high-order multiphoton absorption and nonlinear refraction in GaP, ZnSe, GaSe, and ZGP crystals","authors":"K. Vodopyanov, P. Schunemann, T. Kawamori","doi":"10.1117/12.2601661","DOIUrl":"https://doi.org/10.1117/12.2601661","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126155989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Kiss, R. Flender, M. Kurucz, T. Somoskői, É. Cormier
A simple and cheap technique for post-compression of mid-IR laser pulses relies on nonlinear spectral broadening via SPM in mm-thick optical windows (plates) followed by recompression. Efficient broadening requires peak intensities of ~hundred GW/cm2, which in case of high average power (>10W) drivers puts serious requirements on the used optical materials’ thermal properties, purity, homogeneity, surface quality and LIDT of coatings. Several materials (YAG, fluorides, KBr, Si, ZnSe, ZnS) were tested with 3.2 µm, 13W (130 µJ, 100 kHz), 48 fs pumping. Measured nonlinear absorption, wavefront distortion, spectral broadening and long-term survival as a function of intensity will be shown.
{"title":"Non-linear materials for efficient mid-IR few cycle pulse compression","authors":"B. Kiss, R. Flender, M. Kurucz, T. Somoskői, É. Cormier","doi":"10.1117/12.2602339","DOIUrl":"https://doi.org/10.1117/12.2602339","url":null,"abstract":"A simple and cheap technique for post-compression of mid-IR laser pulses relies on nonlinear spectral broadening via SPM in mm-thick optical windows (plates) followed by recompression. Efficient broadening requires peak intensities of ~hundred GW/cm2, which in case of high average power (>10W) drivers puts serious requirements on the used optical materials’ thermal properties, purity, homogeneity, surface quality and LIDT of coatings. Several materials (YAG, fluorides, KBr, Si, ZnSe, ZnS) were tested with 3.2 µm, 13W (130 µJ, 100 kHz), 48 fs pumping. Measured nonlinear absorption, wavefront distortion, spectral broadening and long-term survival as a function of intensity will be shown.","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132648425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Limitation of dispersive optics for ultrafast physics","authors":"V. Pervak","doi":"10.1117/12.2601385","DOIUrl":"https://doi.org/10.1117/12.2601385","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115615477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Akito Uemura, Haruki Marui, Yuya Tsunezuka, Daichi Shima, T. Kamimura, Julian Long, Kristina Merino, H. Yamaguchi
{"title":"Analysis for damaged surface of Fused Silica with enhanced damage resistance after Magnetic Field-Assisted Finishing","authors":"Akito Uemura, Haruki Marui, Yuya Tsunezuka, Daichi Shima, T. Kamimura, Julian Long, Kristina Merino, H. Yamaguchi","doi":"10.1117/12.2598665","DOIUrl":"https://doi.org/10.1117/12.2598665","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115694475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"LIDT investigations on Ion Beam Sputtered silicon oxynitride coatings","authors":"S. Malobabić, N. Höpfl, S. Herr, L. Mechold","doi":"10.1117/12.2598552","DOIUrl":"https://doi.org/10.1117/12.2598552","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114602382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Single-shot, time-resolved damage of single-crystal YAG using femtosecond near-infrared laser","authors":"M. Tripepi, N. Talisa, E. Deangelis, E. Chowdhury","doi":"10.1117/12.2598673","DOIUrl":"https://doi.org/10.1117/12.2598673","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129476624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Minimizing risk for laser damage due to transverse stimulated raman scattering in large-aperture KDP/DKDP plates for polarization control at 3w","authors":"T. Kosc, T. Kessler, Hu Huang, S. Demos","doi":"10.1117/12.2598783","DOIUrl":"https://doi.org/10.1117/12.2598783","url":null,"abstract":"","PeriodicalId":297423,"journal":{"name":"Laser-Induced Damage in Optical Materials 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126378279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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