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1994 Conference on Lasers and Electro-Optics Europe最新文献

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Infrared optical detectors operating in the 1.7- to 3-µm range based on lnxGa1−xSb for environmental gas-sensing 基于lnxGa1−xSb的红外光学探测器工作在1.7- 3µm范围内，用于环境气体传感
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.cthi53
F. Mansoor, S. Haywood, P. Stavrinou, N. Mason, R. Nicholas, P. Walker, G. Hill
{"title":"Infrared optical detectors operating in the 1.7- to 3-µm range based on lnxGa1−xSb for environmental gas-sensing","authors":"F. Mansoor, S. Haywood, P. Stavrinou, N. Mason, R. Nicholas, P. Walker, G. Hill","doi":"10.1364/cleo_europe.1994.cthi53","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.cthi53","url":null,"abstract":"Devices operating in the 2-5 µm region are of potential importance for use in environmental sensing applications. Atmospheric pollutants such as CO, SOx, and NOx show absorption bands in the 2-5 µm range and passing any of these between a light source and detector will show a change in the detector signal. Strain-balanced GaSb/GaxIn1−xSb quantum well structures are being investigated to cover the 2-3 µm region grown on relaxed GaxIn1_xSb buffer layers. These provide low-strain structures while engineering the bandgap to realise the wavelength of interest. This paper is concerned mainly with the detector structure rather than the design of the active region. Hence bulk GaSb is used as the active region in some of the devices designed to ascertain the efficiency and sensitivity enhancement achievable from resonant structures.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"2 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":"126463108","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
A compact-high efficiency-flashlamp pumped Ti:Al2O3 laser 一种紧凑高效的手电筒泵浦Ti:Al2O3激光器
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.cthn1
F. Collier
{"title":"A compact-high efficiency-flashlamp pumped Ti:Al2O3 laser","authors":"F. Collier","doi":"10.1364/cleo_europe.1994.cthn1","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.cthn1","url":null,"abstract":"Pumping a Ti:Al2O3 laser with another laser, such as a frequency-doubled Nd:YAG laser, limits both the energy of each pulse and the overall efficiency of the system. Pumping Ti:Al2O3 by flashlamps is difficult, however, because of the Ti3+ short radiative lifetime (3.2 μs). Also, we develope an all solid-state power supply that can deliver a 5 kA peak current to the flashlamp on the same time scale. The supply provides a 150 to 300 mA direct simmer current and 10 A pseudo-simmer current (risetime of 100 μs) to allow for spatial centering of the arc in the flashlamp bore. At the top of the pseudo-simmer pulse, the main electrical pulse is provided by an original circuit based on magnetic compression. A maximum energy of 110 J can be delivered to the two flashlamps (55 J per lamp) within 4.5 μs with 75% electrical efficiency.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"20 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":"125332030","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
Mode-locking of a Pr3+-doped fibre laser by pump pulse induced cross phase modulation 掺Pr3+光纤激光器的泵浦脉冲诱导交叉相位调制锁模
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.ctuk8
D. Peter, G. Onishchukov, W. Hodel, H. Weber
{"title":"Mode-locking of a Pr3+-doped fibre laser by pump pulse induced cross phase modulation","authors":"D. Peter, G. Onishchukov, W. Hodel, H. Weber","doi":"10.1364/cleo_europe.1994.ctuk8","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.ctuk8","url":null,"abstract":"We report for the first time on a synchronously pumped mode-locked praseo-dymium-doped fluoride fibre laser emitting at~1.3µm. Mode-locking is achieved by a periodic phase modulation, which results from cross-phase modulation induced by the pump–pulses in the active fibre. The pump source used in the experiments is a Nd:YAG laser generating 90 ps pulses at a repetition rate of 82 MHz. The fibre laser cavity length is matched to a multiple of the pump laser cavity length (9 times). The active fibre is an 8-m-long praseodymum-doped ZBLAN fibre with a dopant concentration of 1000 ppm, a core diameter of 4.8 pm, and a cutoff wavelength of~1µm. The absorption at 1064 nm is approximately 0.2 dB/m. The fibre laser typically reaches threshold for ~400 mW of coupled pump power. Despite the fact that the fibre laser is pumped in the extreme long-wavelength wing of the absorption band, a cw output power of 20 mW is obtained for a coupled pump power of ~1 W. Because of the strong (normal) group velocity dispersion at 1.3 pm in the praseodymium-doped fibre, the generated pulses are far from bandwidth limited, when no dispersion compensating elements are used in the cavity. However, the spectral width of these pulses is ~1.2 nm, which shows that pulse durations in the ps range can be obtained using dispersion compensation. Details of the cw and the modelocking characteristics of the fibre laser are presented. The method of modelocking by cross-phase modulation is compared with other mode-locking techniques such as loss modulation using an acousto-optic modulator.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"54 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":"114171098","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
Single-mode optical parametric oscillator system of BBO and KNbO3 tunable from the visible (0.42 μm) to the infrared (4 μm) BBO和KNbO3单模光学参量振荡器系统可从可见光(0.42 μm)到红外(4 μm)调谐。
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/ASSL.1994.PO8
A. Fix, G. Goeritz, R. Urschel, D. Wildt, A. Borsutzky, R. Wallenstein
{"title":"Single-mode optical parametric oscillator system of BBO and KNbO3 tunable from the visible (0.42 μm) to the infrared (4 μm)","authors":"A. Fix, G. Goeritz, R. Urschel, D. Wildt, A. Borsutzky, R. Wallenstein","doi":"10.1364/ASSL.1994.PO8","DOIUrl":"https://doi.org/10.1364/ASSL.1994.PO8","url":null,"abstract":"As has been demonstrated in previous investigations,1,2 Nd:YAG laser-pumped optical parametric oscillators (OPO) of beta-barium borate (BBO) are powerful all-solid-state sources of coherent radiation with a large tuning range (300–3000 nm), high internal conversion efficiency (60–70%), and high output energies (100–200 mJ). Narrowband operation was achieved by injection seeding with low power monochromatic radiation.3","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"19 2 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":"131105247","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
Annular resonators for diffusion cooled CO2-lasers 用于扩散冷却co2激光器的环形谐振器
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.cff2
D. Ehrlichmann, U. Habich, H. Plum, P. Loosen
{"title":"Annular resonators for diffusion cooled CO2-lasers","authors":"D. Ehrlichmann, U. Habich, H. Plum, P. Loosen","doi":"10.1364/cleo_europe.1994.cff2","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.cff2","url":null,"abstract":"Annular gain geometries provide large surfaces along with compact overall dimensions, which make them promising for compact high power diffusion cooled CO2-lasers (>1 kW). The large surface enables efficient heat removal from the laser gas by heat conduction (diffusion) to the discharge walls. Diffusion cooled systems do not need gas blowers as currently used for convectively cooled lasers. However, a suitable annular resonator has to be designed meeting the requirements of high beam quality and laser efficiency.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"35 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":"114191660","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
Photonic bandgaps and semiconductor electronics 光子带隙与半导体电子学
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.jwa3
E. Yablonovitch
{"title":"Photonic bandgaps and semiconductor electronics","authors":"E. Yablonovitch","doi":"10.1364/cleo_europe.1994.jwa3","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.jwa3","url":null,"abstract":"Summary not available.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"48 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":"127684715","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
Output saturation of the 2.71 μm laser in erbium-doped ZBLAN fibers 掺铒ZBLAN光纤中2.71 μm激光器的输出饱和
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.cthj3
S. Bedö, W. Lüthy, H. Weber
{"title":"Output saturation of the 2.71 μm laser in erbium-doped ZBLAN fibers","authors":"S. Bedö, W. Lüthy, H. Weber","doi":"10.1364/cleo_europe.1994.cthj3","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.cthj3","url":null,"abstract":"The output saturation of the 2.71 μm laser in erbium-doped ZBLAN fibers was measured. The laser resonator was a Fabry-Perot configuration with a buttcoupled dichroic input mirror and the cleaved end of the fiber as output mirror, corresponding to an output reflectivity of 4%. The single mode fibers were pumped with up to 850 mW using a Ti:sapphire laser operated at 791 nm. The erbium concentration in the fibers was 1000 ppm, 5000 ppm, and 10000 ppm wt.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"41 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":"127765993","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
Pulsed photoacoustic detection of CO2 and C2H4 in infrared region 红外区CO2和C2H4的脉冲光声检测
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.cwf83
M. Terzić, P. V. Cvijin, D. Markusev, J. Jovanović-Kurepa
{"title":"Pulsed photoacoustic detection of CO2 and C2H4 in infrared region","authors":"M. Terzić, P. V. Cvijin, D. Markusev, J. Jovanović-Kurepa","doi":"10.1364/cleo_europe.1994.cwf83","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.cwf83","url":null,"abstract":"The detection of air pollutants in the atmosphere is of interest both from the physical point of view and from the atmospheric environmental aspect. Air pollutants are monitored by gas chromatograph techniques or, with better detection limits, by photoacoustic spectroscopy (PAS). The sensitivity of infrared (IR) photoacoustic (PA) detectors is limited not only by the magnitude of the background signal, but also depends on the gas constituents. The presence of CO2 gas in gas samples leads to the decrease of the amplitude of the detected PA signal, due to the effect of the kinetic cooling. Only few IR gas-phase PAS investigations have been made with pulsed CO2 laser sources.1,2","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","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":"129659387","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
Crystalline passive Q-switching of 1.3-µm Nd-lasers and Raman shifting to eye-safe region 1.3µm nd激光器的晶体无源q开关和拉曼位移到人眼安全区域
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.ctuk56
T. Basiev, V. B. Sigachev, M. Doroshenko, P. Zverev, V. Osiko, A. Prokhorov
{"title":"Crystalline passive Q-switching of 1.3-µm Nd-lasers and Raman shifting to eye-safe region","authors":"T. Basiev, V. B. Sigachev, M. Doroshenko, P. Zverev, V. Osiko, A. Prokhorov","doi":"10.1364/cleo_europe.1994.ctuk56","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.ctuk56","url":null,"abstract":"Stimulated Raman scattering (SRS) of 1.3-µm radiation of Nd-lasers can be used to obtain radiation in eye-safe spectral region. For this purpose it is necessary to have an appropriate pump laser operating in Q-switched mode and active medium for SRS. The simplest and most reliable Q-switching of Nd-lasers at 1.3-µm wavelength can be realized by using crystalline saturable absorbers (SA). Nowadays only a limited number of dielectric crystals, which possess nonlinear saturable absorption in the desired region, are known. In this paper we report on a study of Q-switching mode of operation of 1.3-µm Nd-lasers with the Nd2+:SrF2 and V3+:YAG crystalline SA, and Raman shifting of this laser wavelength in Ba(NO3)2 crystal to eye-safe spectral region.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"1 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":"130992110","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
Crystal growth and optical properties of Er3+ in three melilite-type laser hosts: Ca2Al2SiO7 (CAS), Ca2Ca2SiO7 (CGS), and SrLaGa3O7 (SLG) 三种melilite型激光载体:Ca2Al2SiO7 (CAS)、Ca2Ca2SiO7 (CGS)和SrLaGa3O7 (SLG)中Er3+的晶体生长和光学性质
1994 Conference on Lasers and Electro-Optics Europe Pub Date : 1900-01-01 DOI: 10.1364/cleo_europe.1994.ctuk82
B. Teisseire, B. Viana, A. Lejus, D. Vivien
{"title":"Crystal growth and optical properties of Er3+ in three melilite-type laser hosts: Ca2Al2SiO7 (CAS), Ca2Ca2SiO7 (CGS), and SrLaGa3O7 (SLG)","authors":"B. Teisseire, B. Viana, A. Lejus, D. Vivien","doi":"10.1364/cleo_europe.1994.ctuk82","DOIUrl":"https://doi.org/10.1364/cleo_europe.1994.ctuk82","url":null,"abstract":"Er-doped lasers operating near 1.5 µm are useful for numerous applications (LIDAR, optical fiber communication, eye safe range finder). The development of high power laser diodes lasing around 0.98 pm allowed the pumping of the Er3+ ions through Yb3+, which strongly absorbs in that spectral range. Ca2Al2SiO7 (CAS), Ca2Ga2SiO7 (CGS) and SrLaGa3O7 (SLG) with melilite-type structure are good matrices for rare earth ions and a structural disorder around the RE3+ involves broad absorption and fluorescence bands.1 In this study, two series of crystals with good optical quality are prepared by the floating zone method at various RE3+ concentrations to perform spectroscopy and by the Czochralski process to obtain large laser rods.","PeriodicalId":276336,"journal":{"name":"1994 Conference on Lasers and Electro-Optics Europe","volume":"82 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":"124667791","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
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