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Infrared absorption at 1127 cm−1 in silicon 硅中1127 cm−1的红外吸收
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90075-I
M.M. Pradhan
{"title":"Infrared absorption at 1127 cm−1 in silicon","authors":"M.M. Pradhan","doi":"10.1016/0020-0891(93)90075-I","DOIUrl":"10.1016/0020-0891(93)90075-I","url":null,"abstract":"","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 441-442"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90075-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082400","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}
引用次数: 0
100 ps far-infrared laser pulses from optically pumped D2O 光抽运D2O的100 ps远红外激光脉冲
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90063-D
W. Schatz, M.A. Heusinger, R.S. Nebosis, K.F. Renk, P.T. Lang
{"title":"100 ps far-infrared laser pulses from optically pumped D2O","authors":"W. Schatz,&nbsp;M.A. Heusinger,&nbsp;R.S. Nebosis,&nbsp;K.F. Renk,&nbsp;P.T. Lang","doi":"10.1016/0020-0891(93)90063-D","DOIUrl":"10.1016/0020-0891(93)90063-D","url":null,"abstract":"<div><p>In this paper we report the generation of ultrashort far-infrared laser pulses with durations less than 100 ps, powers exceeding 200 kW and intensities of more than 1.5 MW/cm<sup>2</sup>. Far-infrared radiation was produced via stimulated resonance Raman scattering using a high-pressure CO<sub>2</sub>-laser as pump source and the heavy water isotopes D<sub>2</sub><sup>16</sup>O and D<sub>2</sub><sup>18</sup>O as far-infrared laser media. Pulses achieved from this laser system were detected by a novel type of detector, sensitive over a broad spectral range from the far-infrared to the visible, basing on quasiparticle heating in a strip-line structured YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−δ</sub> thin film.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 339-344"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90063-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081764","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}
引用次数: 15
Detection of thermal emission from atmospheric gases by laser heterodyne radiometry 用激光外差辐射法探测大气气体的热辐射
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90072-F
D. Courtois, D. Delahaigue, C. Thiebeaux
{"title":"Detection of thermal emission from atmospheric gases by laser heterodyne radiometry","authors":"D. Courtois,&nbsp;D. Delahaigue,&nbsp;C. Thiebeaux","doi":"10.1016/0020-0891(93)90072-F","DOIUrl":"10.1016/0020-0891(93)90072-F","url":null,"abstract":"<div><p>A gaseous component is considered as a self emitting source that can be detected and characterized remotely by its thermal emission spectrum. The required spectrum analyser should have an appropriately narrow bandwidth. For an atmospheric component, with isolated absorption lines, the linewidths are about 0.1 cm<sup>−1</sup> or 3 GHz under standard conditions. This leads to the need for a high resolution radiometer. A laser heterodyne radiometer (LHR) has been used to detect the emission of two components (C<sub>2</sub>H<sub>4</sub> and NH<sub>3</sub>) at 10 μm wavelength under atmospheric pressure.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 407-413"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90072-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082358","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}
引用次数: 2
1.5410.6-μm eyesafe laser rangefinders performance under adverse weather conditions 1.5410.6 μm激光测距仪在恶劣天气条件下的安全性能
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90074-H
V. Larochelle, D. Hutt , D. Bonnier, J.-M. Thériault
{"title":"1.5410.6-μm eyesafe laser rangefinders performance under adverse weather conditions","authors":"V. Larochelle,&nbsp;D. Hutt ,&nbsp;D. Bonnier,&nbsp;J.-M. Thériault","doi":"10.1016/0020-0891(93)90074-H","DOIUrl":"10.1016/0020-0891(93)90074-H","url":null,"abstract":"<div><p>In this investigation, the performance of a CO<sub>2</sub> laser rangefinder at 10.6 μm and an erbium:glass rangefinder at 1.54 μm are evaluated and compared under various atmospheric conditions. Both systems and the trial site are described. The effect of atmospheric extinction and scattering is discussed. Also, the maximum range capability of the two laser rangefinders under these degraded weather conditions is assessed. The results show that the tested CO<sub>2</sub> laser rangefinder performed better than the Er:glass LRF used for the trials under all weather conditions. However, comparing two state-of-the-art systems does not lead necessarily to the same conclusion.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 421-439"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90074-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082382","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}
引用次数: 2
Applications des lasers, principes optiques avec problèmes commentés 激光的应用，光学原理与问题评论
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90076-J
A. Hadni
{"title":"Applications des lasers, principes optiques avec problèmes commentés","authors":"A. Hadni","doi":"10.1016/0020-0891(93)90076-J","DOIUrl":"10.1016/0020-0891(93)90076-J","url":null,"abstract":"","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Page 443"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90076-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082411","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}
引用次数: 1
Linear and nonlinear response of the avalanche breakdown far-infrared photodetector 雪崩击穿远红外光电探测器的线性和非线性响应
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90067-H
Fielding Brown, James Partan
{"title":"Linear and nonlinear response of the avalanche breakdown far-infrared photodetector","authors":"Fielding Brown,&nbsp;James Partan","doi":"10.1016/0020-0891(93)90067-H","DOIUrl":"10.1016/0020-0891(93)90067-H","url":null,"abstract":"<div><p>It is found that the Avalanche Breakdown far-infrared photodetector responds linearly with incident power, <em>i</em><sub>s</sub> ∝ <em>P</em><sub>s</sub>, when subjected to a specially coherent signal, for example to the beam of a free electron laser, but responds according to a law, <em>i</em><sub>s</sub> ∝ <em>P</em><sup>β</sup><sub>s</sub>, with 0.5 ⩽ β ⩽ 1.0, when irradiated with incoherent radiation, as from a multimode far-infrared laser. Here the detector signal current is <em>i</em><sub>s</sub> and the incident signal intensity is <em>P</em><sub>s</sub>.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 365-369"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90067-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082303","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}
引用次数: 0
Calibration and performance of doped-Ge photoconductors for the ISO Long Wavelength Spectrometer ISO长波谱仪中掺杂锗光导体的标定与性能
Infrared physics Pub Date : 1993-08-01 DOI: 10.1016/0020-0891(93)90071-E
S.E. Church , M.J. Griffin , P.A.R. Ade , M.C. Price , R.J. Emery , B.M. Swinyard
{"title":"Calibration and performance of doped-Ge photoconductors for the ISO Long Wavelength Spectrometer","authors":"S.E. Church ,&nbsp;M.J. Griffin ,&nbsp;P.A.R. Ade ,&nbsp;M.C. Price ,&nbsp;R.J. Emery ,&nbsp;B.M. Swinyard","doi":"10.1016/0020-0891(93)90071-E","DOIUrl":"10.1016/0020-0891(93)90071-E","url":null,"abstract":"<div><p>The Long Wavelength Spectrometer (LWS), part of the Infrared Space Observatory (ISO), uses an array of 10 doped-germanium photoconductors to cover the wavelength range 45–180 μm. The array comprises one Ge:Be detector for the 45–50 μm range, five unstressed Ge:Ga detectors for wavelengths between 50 and 110 μm and four stressed Ge:Ga detectors for the long wavelength range 110–180 μm. We have calibrated the performance of the detectors, both individually and in the LWS. Optimum values of detector bias and operating temperature that maximize the sensitivity of the LWS have been established, resulting in detector NEPs ranging from 10<sup>−17</sup> W Hz<sup>−<span><math><mtext>1</mtext><mtext>2</mtext></math></span></sup> for Ge:Be to 5 × 10<sup>−19</sup> W Hz<sup>−<span><math><mtext>1</mtext><mtext>2</mtext></math></span></sup> for stressed Ge:Ga. Under the low flux conditions expected in the LWS (&lt;10<sup>−14</sup> W at the detector), doped-Ge photoconductors exhibit a number of other non-linearities and memory effects. The characteristics of these effects are described and the implications for operation and calibration of the LWS considered.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 4","pages":"Pages 389-406"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90071-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53082348","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}
引用次数: 4
Static and thermoelastic properties of alkali cyanide crystals 碱氰化物晶体的静态和热弹性性质
Infrared physics Pub Date : 1993-06-01 DOI: 10.1016/0020-0891(93)90022-Y
B.R.K. Gupta
{"title":"Static and thermoelastic properties of alkali cyanide crystals","authors":"B.R.K. Gupta","doi":"10.1016/0020-0891(93)90022-Y","DOIUrl":"10.1016/0020-0891(93)90022-Y","url":null,"abstract":"<div><p>In the present paper an attempt has been made to analyse the thermoelastic properties of alkali cyanide crystals by estimating the values of their cohesive energy, bulk modulus and their pressure derivatives, Debye temperature and Gruneisen parameter. The modified form of the three-body force shell model used in the present study consists of long-range Coulomb and three-body interactions, short-range overlap repulsion of HZ-type, and van der Waals interactions. The van der Waals interaction coefficients are determined using the Kirkwood-Muller theory based on quantum mechanical considerations. Results obtained are compared with the available experimental data. A good agreement is found.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 3","pages":"Pages 333-336"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90022-Y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081525","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}
引用次数: 1
The nature of the absorption bandshape density evolution for the first overtone of CO compressed by N2 N2压缩CO的第一泛音吸收带形密度演化性质
Infrared physics Pub Date : 1993-06-01 DOI: 10.1016/0020-0891(93)90016-Z
G.V. Tchlenova , A.A. Vigasin , J.-P. Bouanich , C. Boulet
{"title":"The nature of the absorption bandshape density evolution for the first overtone of CO compressed by N2","authors":"G.V. Tchlenova ,&nbsp;A.A. Vigasin ,&nbsp;J.-P. Bouanich ,&nbsp;C. Boulet","doi":"10.1016/0020-0891(93)90016-Z","DOIUrl":"10.1016/0020-0891(93)90016-Z","url":null,"abstract":"<div><p>Infrared spectra of the 2←0 absorption band of CO, compressed by N<sub>2</sub> at various densities up to 220 amagat at about 296 and 187 K have been analyzed. To interpret these spectra a line-by-line model has been applied, based on empirical corrections of the Lorentzian line-shape, which account roughly for the effects of line-mixing and the finite duration of collisions. At room temperature, this model provides a satisfactory agreement with experimental bandshapes, especially for the lower N<sub>2</sub> densities. At low temperature, the calculated absorption differs significantly from that observed around the band center, with a discrepancy increasing with the N<sub>2</sub> density. This difficulty is overcome by accounting for the binary—van der Waals complexes— CO…N<sub>2</sub> formation. The extent of these CO…N<sub>2</sub> complexes has been estimated from two models of bandshape fitting the experimental profiles and by a simple thermodynamic calculation.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 3","pages":"Pages 289-298"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90016-Z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081443","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}
引用次数: 4
How to increase S/N ratio by 10:1 in FIR transmission spectroscopy of high extinction index materials 如何将高消光指数材料的FIR透射光谱信噪比提高到10:1
Infrared physics Pub Date : 1993-06-01 DOI: 10.1016/0020-0891(93)90021-X
A. Hadni, X. Gerbaux
{"title":"How to increase S/N ratio by 10:1 in FIR transmission spectroscopy of high extinction index materials","authors":"A. Hadni,&nbsp;X. Gerbaux","doi":"10.1016/0020-0891(93)90021-X","DOIUrl":"10.1016/0020-0891(93)90021-X","url":null,"abstract":"<div><p>To obtain transmission spectra of materials with a high index of extinction is very difficult in the far IR for metals, superconductors, some ferroelectrics, etc. because films as thin as 300 Å are often transmitting less than 1%. It is shown that sticking the film onto a transparent plate and looking at the interference fringes can multiply transmission by a factor of 10 or more.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"34 3","pages":"Pages 327-331"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(93)90021-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53081490","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}
引用次数: 4
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