D. Jaroszynski, M. P. Amnania, C. Aniculaesei, G. Battaglia, E. Brunetti, S. Chen, S. Cipiccia, B. Ersfeld, D. Reboredo Gil, D. W. Grant, P. Grant, M. Hur, L. I. Iñigo Gamiz, T. Kang, K. Kokurewicz, A. Kornaszewski, W. Li, A. Maitrallain, G. Manahan, A. Noble, L. Reid, M. Shahzad, R. Spesyvtsev, A. Subiel, M. Tooley, G. Vieux, S. Wiggins, G. Welsh, S. Yoffe, X. Yang
{"title":"Compact radiation sources based on laser-driven plasma waves","authors":"D. Jaroszynski, M. P. Amnania, C. Aniculaesei, G. Battaglia, E. Brunetti, S. Chen, S. Cipiccia, B. Ersfeld, D. Reboredo Gil, D. W. Grant, P. Grant, M. Hur, L. I. Iñigo Gamiz, T. Kang, K. Kokurewicz, A. Kornaszewski, W. Li, A. Maitrallain, G. Manahan, A. Noble, L. Reid, M. Shahzad, R. Spesyvtsev, A. Subiel, M. Tooley, G. Vieux, S. Wiggins, G. Welsh, S. Yoffe, X. Yang","doi":"10.1117/12.2522929","DOIUrl":"https://doi.org/10.1117/12.2522929","url":null,"abstract":"Here we explore ways of transforming laser radiation into incoherent and coherent electromagnetic radiation using laserdriven plasma waves. We present several examples based on the laser wakefield accelerator (LWFA) and show that the electron beam and radiation from the LWFA has several unique characteristics compared with conventional devices. We show that the energy spread can be much smaller than 1% at 130-150 MeV. This makes LWFAs useful tools for scientists undertaking time resolved probing of matter subject to stimuli. They also make excellent imaging tools. We present experimental evidence that ultra-short XUV pulses, as short as 30 fs, are produced directly from an undulator driven by a LWFA, due to the electron bunches having a duration of a few femtoseconds. By extending the electron energy to 1 GeV, and for 1-2 fs duration pulses of 2 nm radiation peak powers of several MW per pC can be produced. The increased charge at higher electron energies will increase the peak power to GW levels, making the LWFA driven synchrotron an extremely useful source with a spectral range extending into the water window. With the reduction in size afforded by using LWFA driven radiation sources, and with the predicted advances in laser stability and repletion rate, ultra-short pulse radiation sources should become more affordable and widely used, which could change the way science is done.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122673487","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}
A. Ionin, A. Drakin, I. Kholin, A. L’dov, G. Mikaelyan, D. Sinitsin, N. Ustinovskii, D. Zayarnyi
{"title":"Transverse optical pumping of e-beam excited high-pressure He/Ar mixture with a laser diode array","authors":"A. Ionin, A. Drakin, I. Kholin, A. L’dov, G. Mikaelyan, D. Sinitsin, N. Ustinovskii, D. Zayarnyi","doi":"10.1117/12.2521790","DOIUrl":"https://doi.org/10.1117/12.2521790","url":null,"abstract":"An opportunity of developing a laser with optical pumping from metastable ArI levels produced by a relativistic electron beam in high-pressure He-Ar gas mixtures was studied. It was shown that high population and long lifetime of the 1s5 level of Ar atom and broad width (~ 10 nm) of the absorption spectral line made it possible to obtain the most optimal lasing conditions in the afterglow of electron beam pulse within the classical three-level pumping scheme. Rate constants for collisional quenching of low-lying 4s-levels of excited argon atom in He-Ar mixtures in the pressure range from 4.0 to 0.75 atm were measured. An increase of photoluminescence on the 2p10-1s5 transition (912.3 nm) upon application of transverse optical pumping with a laser diode array (811.5 nm) was observed. An application of a semi-transparent cavity resulted in a significant increase of this photoluminescence signal in the afterglow indicating amplified spontaneous emission.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124100406","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}
Yuanhu Wang, L. Duo, Yuqi Jin, Shukai Tang, Liucheng Li, Haijun Yu, Jian Wang
{"title":"Improvement of line selected hydrogen fluoride laser output efficiency by cascade effect","authors":"Yuanhu Wang, L. Duo, Yuqi Jin, Shukai Tang, Liucheng Li, Haijun Yu, Jian Wang","doi":"10.1117/12.2522439","DOIUrl":"https://doi.org/10.1117/12.2522439","url":null,"abstract":"The optical and temporal characteristics of a cw hydrogen fluoride chemical laser with spectral lines is investigated. The distributions of populations on the energy levels of transition line are altered by the cascade effect. The output power of the target line is improved due to this process. Also the laser operational parameters is optimized, in order to demonstrate single line oscillation and laser output enhancement.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131644786","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":"Alignment tolerances of self imaging configurations for passive coherent beam combining","authors":"A. Lapucci, M. Ciofini","doi":"10.1117/12.2522108","DOIUrl":"https://doi.org/10.1117/12.2522108","url":null,"abstract":"We study guided self-imaging schemes useful to obtain Passive Laser Resonators Coupling (PLRC) for Coherent Beam Combining (CBC). Self-imaging schemes are well established methods for PLRC, but they are usually considered limited by large values of edge diffractive losses. In facts the Talbot effect (exact diffractive self-imaging) is obtained with infinite arrays only. This problem can be opposed by using a guided self-imaging that extends the finite array by means of a kaleidoscopic effect. This can be done in 2D with square or hexagonal symmetry or generating an infinite 1D array by winding up a linear array on a circle. In this case cyclic boundary conditions exactly produce an infinite array in the azimuthal direction. We report on numerical simulations performed to assess the coupling efficiency with particular attention to the alignment tolerance. Calculations are carried out with reference to a system of several fiber lasers. Our results indicate this as a viable solution for fiber lasers CBC.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131699960","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":"High power laser activities at Kawasaki Heavy Industries, Ltd.","authors":"F. Wani","doi":"10.1117/12.2522454","DOIUrl":"https://doi.org/10.1117/12.2522454","url":null,"abstract":"Activities on high power laser at Kawasaki Heavy Industries, Ltd. (KHI) are reviewed. We started R and D of high power laser technologies from the development of Chemical Oxygen-Iodine Laser (COIL) for industrial application in 1886. With advent of the 21st century, we shifted the application of our COIL technologies, and successfully received the contract of major high power laser R and D program from the Japan Ministry of Defense (J-MoD) in 2010. The COIL has many attractive features such as high power, good beam quality, etc., but the system is a bit complicated due to the chemical pumping. Currently, we are developing single-mode fiber laser and beam combing technologies for the downsizing of military high power laser.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128308062","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}
D. Yano, M. Shiraishi, Kazuhiro Watanabe, S. Kubodera
{"title":"Observation of inner surface laser-induced periodic surface structures in a microhole produced in a glass optical fiber by varying femtosecond laser pulse number and energy","authors":"D. Yano, M. Shiraishi, Kazuhiro Watanabe, S. Kubodera","doi":"10.1117/12.2522444","DOIUrl":"https://doi.org/10.1117/12.2522444","url":null,"abstract":"Laser-induced periodic surface structures (LIPSS) formation was observed inside a microhole produced in an optical fiber, when the femtosecond laser pulse number and the laser energy were optimized to be 150 and 30μJ, respectively. We have also found that LIPSS were formed only at the bottom of the microhole, which may be responsible for the strong evanescent field produced by the femtosecond laser propagating inside the microhole.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127468464","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}
J. Krása, D. Klír, K. Rezac, J. Cikhardt, A. Velyhan, M. Pfeifer, J. Dostál, M. Krůs, R. Dudzak, S. Buryšková, V. Nassisi, D. Delle Side
{"title":"Target current: an appropriate parameter for characterizing the dynamics of laser-matter interaction","authors":"J. Krása, D. Klír, K. Rezac, J. Cikhardt, A. Velyhan, M. Pfeifer, J. Dostál, M. Krůs, R. Dudzak, S. Buryšková, V. Nassisi, D. Delle Side","doi":"10.1117/12.2520177","DOIUrl":"https://doi.org/10.1117/12.2520177","url":null,"abstract":"A resistive target probes were employed to obtain unique characteristics of the dynamic of the laser-matter interaction through the observation of a return current neutralizing the positive target charge caused by electrons definitely leaving the plasma. Experimental observations show that three phases of the laser-produced plasma are well recognized, i.e. the plasma ignition phase, active plasma phase, and afterglow phase already for the lowest laser intensity at the focal point of 108 Wcm-2 . Then, at higher intensities the first two phases strongly dominate and the target current reaches a value of 10 kA. A throughput of plasma barrier for the fastest electrons leaving the plasma is defined, and its value is experimentally estimated. We also present key experiments proving that the duration of the electrical charge on the target is much longer than the duration of the laser-plasma interaction for the entire intensity range.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129958240","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}
C. Zesch, S. Schrader, P. Prosposito, O. Lux, H. Eichler
{"title":"Raman lasers for trace gas detection","authors":"C. Zesch, S. Schrader, P. Prosposito, O. Lux, H. Eichler","doi":"10.1117/12.2522463","DOIUrl":"https://doi.org/10.1117/12.2522463","url":null,"abstract":"The emission of commercial solid-state lasers is shifted by Raman lasers to selected wavelengths suitable for trace gas detection. High power Raman lasers based on Ba(NO3)2, diamond and silicon detect CO2, O3 and H2O. Raman lasers base on the physical effect of stimulated Raman scattering. Two new Raman crystals (Spodumene and LuAlO3) are investigated and their SRS-spectra is shown.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124674799","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":"High-power excimer laser with excellent energy stability","authors":"Kazuhiro Hirata, Kazuhiro Saida, H. Kato","doi":"10.1117/12.380860","DOIUrl":"https://doi.org/10.1117/12.380860","url":null,"abstract":"A 200 watts excimer laser with excellent energy stability has been developed. The laser is based on the XMR model 5300, and thorough improvements were made over the XMR5300. The laser can produce a stable output of 200 watts (667 mJ, 300 Hz) under servo-controlled operation over 24 hours (greater than 25 million pulses). During this operation, the output fluctuation was found to be less than 1.5% for (sigma) and 10% for peak to peak. Horizontal and vertical beam divergences were less than 1 mrad and 4 mrad, respectively.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"39 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120853601","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}
H. Furukawa, Norimitsu Hiura, Y. Kato, H. Matsui, M. Yamanaka, Y. Izawa, S. Nakai, C. Yamanaka
{"title":"Evaluation of thermal birefringence power loss in the laser-diode-pumped Nd:glass laser","authors":"H. Furukawa, Norimitsu Hiura, Y. Kato, H. Matsui, M. Yamanaka, Y. Izawa, S. Nakai, C. Yamanaka","doi":"10.1117/12.380939","DOIUrl":"https://doi.org/10.1117/12.380939","url":null,"abstract":"A 3D analysis code of thermal birefringence in solid-state lasers was developed. Basic equations include thermal conduction, absorption of laser energy, thermal stress and thermal birefringence. Relative phase shift induced by thermal effects are measured and found to be in good agreement with quantitative simulation results. Edge effects of thermal birefringence are quantitatively estimated by 3D simulation. Those are unable to be estimated by 2D analysis.","PeriodicalId":375593,"journal":{"name":"Advanced High-Power Lasers and Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126618567","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}