A technique has been reported1 that shows promise for field-splicing groups of optical fibers. Grooved aluminum chips were initially interleaved between linear arrays of optical fibers to form a precise two-dimensional array. This array was then potted to retain the precise geometry and polished to provide good ends on all the fibers at once. Two such arrays are brought together to form a butt joint splice. Improved chips are presently being used that yield greatly improved alignment. This alignment improvement promises a significant reduction over the array splice loss that was obtained with the original aluminum chips1 (mean loss = 0.42 dB with 70% less than 0.5 dB).
{"title":"Fiber optic array splicing","authors":"C. M. Miller, C. Schroeder","doi":"10.1364/cleos.1976.the8","DOIUrl":"https://doi.org/10.1364/cleos.1976.the8","url":null,"abstract":"A technique has been reported1 that shows promise for field-splicing groups of optical fibers. Grooved aluminum chips were initially interleaved between linear arrays of optical fibers to form a precise two-dimensional array. This array was then potted to retain the precise geometry and polished to provide good ends on all the fibers at once. Two such arrays are brought together to form a butt joint splice. Improved chips are presently being used that yield greatly improved alignment. This alignment improvement promises a significant reduction over the array splice loss that was obtained with the original aluminum chips1 (mean loss = 0.42 dB with 70% less than 0.5 dB).","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121191494","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 9-channel 100-Hz closed-loop modal multidither COAT (Coherent Optical Adaptive Technique) system is described that could be used to improve propagation of a laser beam through the atmosphere and compensate for system induced optical aberrations.
{"title":"Modal wavefront control system","authors":"C. Neufeld, E. L. Sloan, M. Skolnick","doi":"10.1364/cleos.1976.thf4","DOIUrl":"https://doi.org/10.1364/cleos.1976.thf4","url":null,"abstract":"A 9-channel 100-Hz closed-loop modal multidither COAT (Coherent Optical Adaptive Technique) system is described that could be used to improve propagation of a laser beam through the atmosphere and compensate for system induced optical aberrations.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"494 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057967","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}
This paper presents the analysis and preliminary configurations of a 10.6-μm ladar using heterodyne detection. Low altitude supersonic antiship missiles pose a serious threat to U.S. Naval forces. Radars cannot accurately track them at short ranges due to multiple reflections from the ocean surface. Passive ir sensors exhibit contrast washout under certain conditions at low elevation angles. The ladar sensor provides a means of tracking ASMs at short ranges for precision fire control and for air-to-air missile guidance for head-on aircraft attack.
{"title":"Optical heterodyne radar (ladar) for precision missile tracking and guidance","authors":"P. D. Pratt","doi":"10.1364/cleos.1976.tuc3","DOIUrl":"https://doi.org/10.1364/cleos.1976.tuc3","url":null,"abstract":"This paper presents the analysis and preliminary configurations of a 10.6-μm ladar using heterodyne detection. Low altitude supersonic antiship missiles pose a serious threat to U.S. Naval forces. Radars cannot accurately track them at short ranges due to multiple reflections from the ocean surface. Passive ir sensors exhibit contrast washout under certain conditions at low elevation angles. The ladar sensor provides a means of tracking ASMs at short ranges for precision fire control and for air-to-air missile guidance for head-on aircraft attack.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127380688","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}
The Lawrence Livermore Laboratory is heavily involved in the development of high-power laser systems for applications in fusion research. For near and intermediate term applications the neodymium-glass laser was chosen as it represented the best available technology for the production of high-power pulses. However, extensive research and development have been required to optimize the laser to deliver maximum power to small diameter fusion targets. The nonlinear refractive index of the laser glass and passive optical elements profoundly influence system performance, necessitating an entirely new approach to the design of such lasers. New optical materials are also being developed which are expected to improve substantially the performance of this class of laser systems. Three major neodymium-glass laser systems are operating or under construction at LLL which have been made possible by the technology development program. These systems are given in Table I.
{"title":"Physics and engineering of high-power laser systems","authors":"J. Emmett","doi":"10.1364/cleos.1976.tha2","DOIUrl":"https://doi.org/10.1364/cleos.1976.tha2","url":null,"abstract":"The Lawrence Livermore Laboratory is heavily involved in the development of high-power laser systems for applications in fusion research. For near and intermediate term applications the neodymium-glass laser was chosen as it represented the best available technology for the production of high-power pulses. However, extensive research and development have been required to optimize the laser to deliver maximum power to small diameter fusion targets. The nonlinear refractive index of the laser glass and passive optical elements profoundly influence system performance, necessitating an entirely new approach to the design of such lasers. New optical materials are also being developed which are expected to improve substantially the performance of this class of laser systems. Three major neodymium-glass laser systems are operating or under construction at LLL which have been made possible by the technology development program. These systems are given in Table I.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"253 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122662002","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}
Low-cost lasers are also internal-mirror lasers. The basic economic advantage of this type comes from minimizing the number of parts by designing the vacuum envelope to serve also as the mirror support structure and by eliminating elaborate adjustments.
{"title":"Low-power low-cost He-Ne lasers","authors":"D. Wright","doi":"10.1364/cleos.1976.we1","DOIUrl":"https://doi.org/10.1364/cleos.1976.we1","url":null,"abstract":"Low-cost lasers are also internal-mirror lasers. The basic economic advantage of this type comes from minimizing the number of parts by designing the vacuum envelope to serve also as the mirror support structure and by eliminating elaborate adjustments.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114280794","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. Pernick, R. E. Kopp, R. Wohlers, R. Herold, J. Lisa, J. Mendelsohn, H. Stone
Coherent optical signal processing techniques for automatic screening of exfoliated cervical cytological samples were evaluated. Work centered on deriving feature measurements from the Fourier transform patterns of individual cells. The two-dimensional Fourier spectra of a large number of high resolution cell photographs were generated in an optical spatial spectrum analyzer. A special geometry solid state detector array measured the light intensity in a number of regions of the cell diffraction pattern. The optical system achieves a large sample data base with automated data collection, processing, and storage capabilities. Stringent optical component stability is needed for reliable and repeatable performance.
{"title":"Cervical cytological (Pap) smear screening with coherent optics","authors":"B. Pernick, R. E. Kopp, R. Wohlers, R. Herold, J. Lisa, J. Mendelsohn, H. Stone","doi":"10.1364/cleos.1976.tue6","DOIUrl":"https://doi.org/10.1364/cleos.1976.tue6","url":null,"abstract":"Coherent optical signal processing techniques for automatic screening of exfoliated cervical cytological samples were evaluated. Work centered on deriving feature measurements from the Fourier transform patterns of individual cells. The two-dimensional Fourier spectra of a large number of high resolution cell photographs were generated in an optical spatial spectrum analyzer. A special geometry solid state detector array measured the light intensity in a number of regions of the cell diffraction pattern. The optical system achieves a large sample data base with automated data collection, processing, and storage capabilities. Stringent optical component stability is needed for reliable and repeatable performance.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129563417","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}
We are completing the construction and testing of a remote air pollution detection system that utilizes a 1.4–4-μm tunable LiNbO3 parametric oscillator source. The Nd.YAG pumped parametric oscillator operates under computer control at greater than 20% energy conversion efficiency. Bandwidths using grating, etalon line narrowing elements are less than 0.1 cm−1.
{"title":"Remote air pollution monitoring system using a tunable 1.4–4.0-μm infrared source","authors":"R. Baumgartner, S. Warshaw, D. Wolfe, R. Byer","doi":"10.1364/cleos.1976.wf2","DOIUrl":"https://doi.org/10.1364/cleos.1976.wf2","url":null,"abstract":"We are completing the construction and testing of a remote air pollution detection system that utilizes a 1.4–4-μm tunable LiNbO3 parametric oscillator source. The Nd.YAG pumped parametric oscillator operates under computer control at greater than 20% energy conversion efficiency. Bandwidths using grating, etalon line narrowing elements are less than 0.1 cm−1.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129133676","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}
Pulsed holography has proved to be an extremely useful technique for detecting particle size and velocity distributions of pollutants, projectiles, aerosols, etc. The technique is particularly advantageous in that it allows entire volumes to be recorded, undisturbed, in one exposure and analyzed at a later time.
{"title":"Practical limitations of transmission holography in particle analysis","authors":"R. Pitlak, R. Page","doi":"10.1364/cleos.1976.wc3","DOIUrl":"https://doi.org/10.1364/cleos.1976.wc3","url":null,"abstract":"Pulsed holography has proved to be an extremely useful technique for detecting particle size and velocity distributions of pollutants, projectiles, aerosols, etc. The technique is particularly advantageous in that it allows entire volumes to be recorded, undisturbed, in one exposure and analyzed at a later time.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116183067","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}
One critical feature in the design of very high-power multistage CO2 laser systems is provision of adequate interstage isolation. The requirements for isolation are stringent due to the large gain bandwidth of the medium and the necessity of highly saturated operation.
{"title":"Broadband passive isolator for high-power 10-μm laser systems","authors":"C. Phipps, S. Thomas, J. Figueira","doi":"10.1364/cleos.1976.wa6","DOIUrl":"https://doi.org/10.1364/cleos.1976.wa6","url":null,"abstract":"One critical feature in the design of very high-power multistage CO2 laser systems is provision of adequate interstage isolation. The requirements for isolation are stringent due to the large gain bandwidth of the medium and the necessity of highly saturated operation.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121660146","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}
Neodymium-doped lanthanum beryllate (La2Be2O5 or BEL) is a laser crystal that looks promising as an intermediate gain laser material. A lasing threshold comparable to Nd:YAG, higher slope efficiency, and three times higher Q-switched output energy have been obtained. The laser tests were performed on 6.3-mm diam by 76-mm log rods under identical conditions.
{"title":"Properties of Nd:La2Be2O5 laser crystals","authors":"H. Jenssen, R. Begley, R. Morris","doi":"10.1364/cleos.1976.wb7","DOIUrl":"https://doi.org/10.1364/cleos.1976.wb7","url":null,"abstract":"Neodymium-doped lanthanum beryllate (La2Be2O5 or BEL) is a laser crystal that looks promising as an intermediate gain laser material. A lasing threshold comparable to Nd:YAG, higher slope efficiency, and three times higher Q-switched output energy have been obtained. The laser tests were performed on 6.3-mm diam by 76-mm log rods under identical conditions.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124094258","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：