CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics最新文献

{"title":"High photorefractive sensitivity in the visible and at 860 nm in reduced iron and rhodium-doped KNbO/sub 3/","authors":"M. Ewart, R. Ryf, C. Medrano, H. Wuest, M. Zgonik, L. Biaggio, P. Gunter","doi":"10.1109/CLEO.1997.603224","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603224","url":null,"abstract":"","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116129660","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":"Frequency tunable light sources with high single-frequency output power in the green and blue spectral region","authors":"M. Bode, I. Freitag, A. Tunnermann, H. Welling","doi":"10.1109/CLEO.1997.603289","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603289","url":null,"abstract":"","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116527729","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":"Raman detection of pigments in the human retina","authors":"W. Gellermann, Mihoko D. Yoshida, R. McClane, N. Balashov, P. Bernstein","doi":"10.1109/CLEO.1997.603175","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603175","url":null,"abstract":"We have used resonance Raman scattering as a non-invasive optical technique to measure the concentration of carotenoid pigments in the human retina. The technique is highly sensitive and specific strength scales linearly with actual macular carotenoid content as measured by high-pressure liquid chromatography. This will facilitate studies of carotenoid distributions and their role in degenerative diseases of the eye and may allow for the rapid screening of carotenoid levels in large populations at risk for vision loss from age-related macular degeneration, the leading cause of blindness in the elderly in the US.","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122367219","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":"VUV laser-induced plasma emissions for ultra-micro spectrochemical analysis of liquid samples","authors":"N. Cheung, C. W. Ng, W. F. Ho, E. Yeung","doi":"10.1109/CLEO.1997.602443","DOIUrl":"https://doi.org/10.1109/CLEO.1997.602443","url":null,"abstract":"Laser-induced breakdown spectroscopy as an analytical tool was plagued by plasma continuum emissions. Extensive signal averaging was therefore necessary, unfortunately at the expense of the lowest detectable mass.","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122559042","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":"Electric-field-tunable laser emission by photon-assisted tunneling","authors":"J. Faist, F. Capasso, C. Sirtori, D. Sivco, A. L. Hutchinson, A. Cho","doi":"10.1109/CLEO.1997.603366","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603366","url":null,"abstract":"rate equations has been performed by considering perturbations of the carrier densities about steady state values. That analysis predicts a resonance in the modulation response at a frequency, o, which may be identified as the maximum modulation frequency (MMF) of the device. It is noted that because of the picosecond electron lifetimes that are characteristic of such structures, the estimated MMF is of order 1 THz. It is further observed that such carrier lifetimes are typically of the same order as the photon lifetime, T ~ . Here, in contrast with interband semiconductor lasers, there is a fine balance between the contributions of the resonance frequency and damping factor in the determination of the maximum modulation frequency. In consequence it is found that the MMF does not increase monotonically as a function of the optical output power of the laser. The dependence of the modulation response on the laser output power is illustrated in Fig. 2, where the existence of an optimum optical output power to achieve the maximum modulation frequency is demonstrated. In general numerical solutions of the rate equations are required to elicit the modulation response and the outcome of such calculations will be presented. It is noted, however, that for devices in which a single tunneling time, T , is applicable ie where T~ = T~~ = T ~ ~ , an analytcal expression for that optimum output power can be found and the corresponding MMF is written explicitly as","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671306","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":"Role of electron-phonon interaction in improved laser performance of the Cr/sup 4+/: Ca/sub 2/GeO/sub 4/ laser crystal","authors":"S. Owen, D. Calistru, S. Demos, A. Bykov, V. Petričević, R. Alfano","doi":"10.1109/CLEO.1997.603489","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603489","url":null,"abstract":"","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122749201","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":"20 W, High-brightness Angled-grating DFB Laser Array","authors":"A. Schoenfelder, S. Demars, S. O’Brien, R. Lang","doi":"10.1109/CLEO.1997.602148","DOIUrl":"https://doi.org/10.1109/CLEO.1997.602148","url":null,"abstract":"","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004638","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":"The polarization dependence of the two-photon absorption coefficient in an AlGaAs waveguide autocorrelator","authors":"M. M. Karkhanehchi, J. Marsh, D. Hutchings","doi":"10.1109/CLEO.1997.603485","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603485","url":null,"abstract":"","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121993624","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":"Modelocking pulse dynamics in fiber lasers","authors":"J. Kutz, K. Bergman, S. Tsuda, W. Knox","doi":"10.1117/12.316716","DOIUrl":"https://doi.org/10.1117/12.316716","url":null,"abstract":"Erbium-doped fibers are ideal as the basic components for lasers and amplifiers operating near 1550 nm. Consequently, considerable interest and research in the past few years has focused on the use of Erbium-doped fibers in actively and passively modelocked fiber lasers operating in both the normal and anomalous dispersion regimes. This paper presents a variety of analytic and numerical techniques which can be used to quantitatively describe the dynamic pulse formation in a passive laser cavity which includes dispersion, nonlinearity, loss, and bandwidth limited gain-saturation. The mechanisms for modelocking (e.g. quantum-well semiconductor structures, APM action, etc.) are incorporated into the modelocking models via various appropriate approximations. The models capture the fundamental intensity-dependent loss required to achieve stable modelocked operation. This generic feature of modelocked lasers will be discussed in detail and illustrated in various modelocking devices and configurations. Additionally, the characteristic differences between modelocking in the normal dispersion regime, for which highly chirped pulses are observed, and the anomalous dispersion regime, for which soliton pulses can be achieved, will be discussed. Finally, stability of the modelocked pulses will be investigated. Here we will emphasize the range of stable one-pulse per round trip operation and the instability to multi-pulse operation. For multi-pulse operation, mechanisms for harmonic modelocking such as gain- relaxation, dispersive radiation, and the acoustic effect will be discussed. In most instances, analytic methods can be utilized to gain significant insight into the laser operation and stability.","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122102264","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":"Investigations of the spectral characteristics of 980-nm fiber pump lasers","authors":"I. Avrutsky, R. Gordon, J.M. Xu, R. Clayton","doi":"10.1109/CLEO.1997.603200","DOIUrl":"https://doi.org/10.1109/CLEO.1997.603200","url":null,"abstract":"Al,,58Gao,42 waveguide whose total thickness is 500 nm. The NSOM system, described schematically in Fig. 2,13 uses cantilevered optical elements3 with a resolution of -100 nm. The principles of scanning and control have been described in Refs. 3 and 4. The output from the cantilevered optical fibers passed through a monochromator and was detected by use of a sensitive silicon APD. Figure 3a14 describes a spatially resolved L-I curve measured with the high-resolution fiber placed at the wire center. We note a clear threshold at 100 mA and a linear response up to about one and a half times threshold. In Fig. 3b we show the optical spectrum, measured with a 2-nm resolution, of the light collected from the wire region at a drive current of 140 mA. We observe essentially a single-moded emission at 806 nm that did not change for drive currents of 100 mA to 150 mA. Figure 3c shows a detailed image of the fundamental heart-shaped lasing mode, measured at several drive currents below and above threshold with the monochromator set to 806 nm. The measured pattern at 150 mA, which is highlighted in Fig. 3d, confirms the predicted shape’ with a remarkable accuracy. In addition to the high resolution scans of the wire region, we have also scanned the complete laser cross section and recorded the spatially resolved spectra at several drive currents. These measurements revealed emission from the sloped areas as well as the top corners ofthe structure yielding important information on current and injected carrier leakage paths in these complex devices. In conclusion, we have performed high spatial resolution measurements of light-current characteristics, emission spectra, and nearfield intensity distributions of QWR diode lasers using NSOM techniques. Our results provide important information relevant to the design of these devices. Nanonics Ltd., Jerusalem, Israel is acknowledged for providing the cantilevered optical fibers used in these experiments. *Electrical Engineering Department, Technion, Haqa, Israel **Physics Department, Swiss Federal Institute of Technology, Lausanne, Switzerland 1. E. Kapon et al., Optoelectron. Dev. and Technol. 8,429 (1993). 2. E. Kapon et al., Superlattices and Microstructures 12,491 (1992). 3. S. Shalom, K. Lieberman, A. Lewis, S. R. Cohen, Rev. Sci. Instrum. 63,4061 (1992). 4. U. Ben-Ami, N. Ben-Ami, G. Fish, N. Tessler, R. Nagar, G. Eisenstein, A. Lewis, J. M. Nielsen, A. Moller-Larson, Appl. Phys. Lett. 65,648 (1994).","PeriodicalId":173652,"journal":{"name":"CLEO '97., Summaries of Papers Presented at the Conference on Lasers and Electro-Optics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116732784","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}