Pub Date : 2001-08-24DOI: 10.1109/CLEOE.1998.719099
Christian Bosshard
Organic materials hold a large promise for second- and third-order nonlinear optical and fast electro-optic applications due to the large nonlinearities of the basic molecular units and the almost purely electronic origin of the nonlinearity. We here discuss the new development in this field with respect to molecules, polymers, and molecular crystals.
{"title":"Organic Nonlinear Optical Materials","authors":"Christian Bosshard","doi":"10.1109/CLEOE.1998.719099","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719099","url":null,"abstract":"Organic materials hold a large promise for second- and third-order nonlinear optical and fast electro-optic applications due to the large nonlinearities of the basic molecular units and the almost purely electronic origin of the nonlinearity. We here discuss the new development in this field with respect to molecules, polymers, and molecular crystals.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124137559","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. Vickers, P. Aiyarak, A. Walker, J. Watling, J. Roberts
One current growth area in the field of optical communications is that of wavelength division multiplexing (WDM). One demand of WDM is a set of devices or a single device capable of emitting a range of wavelengths.
{"title":"Novel Hot Electron Light Emitter","authors":"A. Vickers, P. Aiyarak, A. Walker, J. Watling, J. Roberts","doi":"10.1117/12.356919","DOIUrl":"https://doi.org/10.1117/12.356919","url":null,"abstract":"One current growth area in the field of optical communications is that of wavelength division multiplexing (WDM). One demand of WDM is a set of devices or a single device capable of emitting a range of wavelengths.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133896412","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719015
A. Dunlop, W. Firth, E. W. Wright
It is usually assumed that the Petermann K-factor [1] is a cavity property, independent of position z around the cavity. We show that K is not invariant, and consider the implications for laser noise. K arises for optical systems with non-Hermitian modes.
{"title":"Noise in Cavities with Multi-Valued Petermann Factor","authors":"A. Dunlop, W. Firth, E. W. Wright","doi":"10.1109/CLEOE.1998.719015","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719015","url":null,"abstract":"It is usually assumed that the Petermann K-factor [1] is a cavity property, independent of position z around the cavity. We show that K is not invariant, and consider the implications for laser noise. K arises for optical systems with non-Hermitian modes.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116645312","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719466
M. Alvisi, G. De Nunzio, M. Perrone, A. Rizzo, S. Scaglione, L. Vasanelli
The quality of laser beams strongly depends on the optical characteristics of the cavity mirrors; thus the development of good quality UV/VUV coated optical components is much requested by researchers and industry. The choice of the deposition technique has a considerable influence on the film features: the use of ion assisted techniques is a means of improving the compactness and adhesion of films, while limiting the temperature of the substrate during the deposition.
{"title":"Laser-Induced Damage Thresholds of SiO/sub 2/ Films Grown with Different Assistance Parameters: A Comparative Study Performed by the Photoacoustic Mirage Technique","authors":"M. Alvisi, G. De Nunzio, M. Perrone, A. Rizzo, S. Scaglione, L. Vasanelli","doi":"10.1109/CLEOE.1998.719466","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719466","url":null,"abstract":"The quality of laser beams strongly depends on the optical characteristics of the cavity mirrors; thus the development of good quality UV/VUV coated optical components is much requested by researchers and industry. The choice of the deposition technique has a considerable influence on the film features: the use of ion assisted techniques is a means of improving the compactness and adhesion of films, while limiting the temperature of the substrate during the deposition.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116898072","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719163
A. McLaughlin, J. Bonar, M. Jubber, F. Camacho, J. Aitchison
Fibre optic low-coherence interferometry is of great interest for industrial sensing applications In general, systems use a low-coherence source to illuminate two interferometers with matched optical path differences (OPD), greater than the source coherence length. Typically, the first interferometer is used as a sensor, for example micro-machined silicon resonant sensors [1], where a reference and modulated sensing signal are derived from the sensor head. Due to the large OPD the two signals can propagate together without interference. The second interferometer acts as a detector, where due to its matched OPD, the signals from the sensor head are brought back into coherence and interfere.
{"title":"Integrated Optical Interferometers for Low Coherence Sensing Applications","authors":"A. McLaughlin, J. Bonar, M. Jubber, F. Camacho, J. Aitchison","doi":"10.1109/CLEOE.1998.719163","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719163","url":null,"abstract":"Fibre optic low-coherence interferometry is of great interest for industrial sensing applications In general, systems use a low-coherence source to illuminate two interferometers with matched optical path differences (OPD), greater than the source coherence length. Typically, the first interferometer is used as a sensor, for example micro-machined silicon resonant sensors [1], where a reference and modulated sensing signal are derived from the sensor head. Due to the large OPD the two signals can propagate together without interference. The second interferometer acts as a detector, where due to its matched OPD, the signals from the sensor head are brought back into coherence and interfere.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117163400","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719025
P. Chazan, M. Mikulla, S. Morgott, R. Kiefer, A. Wetzel, M. Walther, J. Braumstein, G. Weimann
{"title":"2D-Simultation of Tapered Amplifiers Comparison to Experimental Results","authors":"P. Chazan, M. Mikulla, S. Morgott, R. Kiefer, A. Wetzel, M. Walther, J. Braumstein, G. Weimann","doi":"10.1109/CLEOE.1998.719025","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719025","url":null,"abstract":"","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127114884","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719535
O. Antipov, A. Kuzhelev, D. Chausov, V. A. Vorob’ev, A. P. Zinov’ev, A. Luk'yanov
Ti investigate the real part of resonant susceptibility and refractive index grating formation in inverted Nd:YAGr the authors used a low-noise Jamin-Lebedev interferometer to measure the refractive index of the changes due to energy state changes in the Nd population.
{"title":"Real part of resonant susceptibility and refractive index grating formation in inverted Nd:YAG","authors":"O. Antipov, A. Kuzhelev, D. Chausov, V. A. Vorob’ev, A. P. Zinov’ev, A. Luk'yanov","doi":"10.1109/CLEOE.1998.719535","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719535","url":null,"abstract":"Ti investigate the real part of resonant susceptibility and refractive index grating formation in inverted Nd:YAGr the authors used a low-noise Jamin-Lebedev interferometer to measure the refractive index of the changes due to energy state changes in the Nd population.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127463914","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719469
S. Kudryashov, S. G. Ionov, N. B. Zorov
Foam graphite is a new and perspective material for laser ablation applications possessing of very low (subcriticai) bulk density and high concentration of nonequilibrium chemically-induced structural defects (vacancies and etc.). It shows “black body” absorbance, very low transversal thermal diffusivity and sound velocity due to its “sandwich-like” structure of graphite crystallites. Equilibrium laser evaporation of the low-density foam graphite occurs in regular air gaps of its “sandwich-like” structure and thus critical state of carbon seems to be produced. The droplet-like structure of critical state has been predicted by theory of condensed matter state earlier. Therefore laser-induced carbon critical state seems to be intensive source of carbon nanoclusters.
{"title":"Production of Supported Carbon Nanoclusters at Laser Ablation of Foam Graphite","authors":"S. Kudryashov, S. G. Ionov, N. B. Zorov","doi":"10.1109/CLEOE.1998.719469","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719469","url":null,"abstract":"Foam graphite is a new and perspective material for laser ablation applications possessing of very low (subcriticai) bulk density and high concentration of nonequilibrium chemically-induced structural defects (vacancies and etc.). It shows “black body” absorbance, very low transversal thermal diffusivity and sound velocity due to its “sandwich-like” structure of graphite crystallites. Equilibrium laser evaporation of the low-density foam graphite occurs in regular air gaps of its “sandwich-like” structure and thus critical state of carbon seems to be produced. The droplet-like structure of critical state has been predicted by theory of condensed matter state earlier. Therefore laser-induced carbon critical state seems to be intensive source of carbon nanoclusters.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124802979","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719479
E. Ng, I. Watson
{"title":"Comparison of Weld Quality with Normal and 30/spl deg/ Incident Laser Beams","authors":"E. Ng, I. Watson","doi":"10.1109/CLEOE.1998.719479","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719479","url":null,"abstract":"","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125121807","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}
Pub Date : 1998-09-14DOI: 10.1109/CLEOE.1998.719633
M. Kaczmarek, R. Eason
Numerous interaction geometries have been developed for photorefractive materials that rely on amplification of light via the two-beam coupling effect. One of the most elegant and simple configurations is a unidirectional ring resonator, which consists of a photorefractive crystal placed in a ring cavity and pumped by an external beam. If the two-beam coupling gain is above threshold, the resonating beam will build up from the amplification of scattered light. We present results on the most crucial parameters for the effective build-up of power in the resonating beam the wavelength of the pump beam, and the type of photorefractive material. The resonating beam accumulates energy from successive amplification in a photorefractive material until saturation sets in but also loses energy from absorption and other losses such as Fresnel reflections from the crystal and imperfect mirrors. We have performed intensity-dependent modelling of the resonator's power conversion factor. The power conversion factor is defined as the ratio of the resonating beam intensity to the intensity of the external pump beam. The figure below shows the dependence of this factor on absorption coefficient for different values of coupling coefficient Gamma.
{"title":"Conditions for Efficient Build-Up of Power in a Ring-Cavity with Rh:BaTiO/sub 3/","authors":"M. Kaczmarek, R. Eason","doi":"10.1109/CLEOE.1998.719633","DOIUrl":"https://doi.org/10.1109/CLEOE.1998.719633","url":null,"abstract":"Numerous interaction geometries have been developed for photorefractive materials that rely on amplification of light via the two-beam coupling effect. One of the most elegant and simple configurations is a unidirectional ring resonator, which consists of a photorefractive crystal placed in a ring cavity and pumped by an external beam. If the two-beam coupling gain is above threshold, the resonating beam will build up from the amplification of scattered light. We present results on the most crucial parameters for the effective build-up of power in the resonating beam the wavelength of the pump beam, and the type of photorefractive material. The resonating beam accumulates energy from successive amplification in a photorefractive material until saturation sets in but also loses energy from absorption and other losses such as Fresnel reflections from the crystal and imperfect mirrors. We have performed intensity-dependent modelling of the resonator's power conversion factor. The power conversion factor is defined as the ratio of the resonating beam intensity to the intensity of the external pump beam. The figure below shows the dependence of this factor on absorption coefficient for different values of coupling coefficient Gamma.","PeriodicalId":404067,"journal":{"name":"CLEO/Europe Conference on Lasers and Electro-Optics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125194267","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}
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