Pub Date : 2000-09-10DOI: 10.1109/CLEOE.2000.910232
M. Alshikh Khalil, G. Vitrant, P. Chollet, F. Kajzar
Summary form only given. We consider hybrid planar waveguides which are constituted of ion-exchanged glass substrates top covered by high index polymer layers. They have been specially designed and fabricated for a highly efficient nonlinear interaction. Without any corrugation, phase-matching between the different waves is realized thanks to the use of different guided modes at the different wavelengths. This is called modal dispersion phase matching (MDPM). In this communication we report on second harmonic generation after a longer propagation in the waveguide of 5mm.
{"title":"Hybrid organic/inorganic waveguide structure with highly efficient second order nonlinear interactions","authors":"M. Alshikh Khalil, G. Vitrant, P. Chollet, F. Kajzar","doi":"10.1109/CLEOE.2000.910232","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910232","url":null,"abstract":"Summary form only given. We consider hybrid planar waveguides which are constituted of ion-exchanged glass substrates top covered by high index polymer layers. They have been specially designed and fabricated for a highly efficient nonlinear interaction. Without any corrugation, phase-matching between the different waves is realized thanks to the use of different guided modes at the different wavelengths. This is called modal dispersion phase matching (MDPM). In this communication we report on second harmonic generation after a longer propagation in the waveguide of 5mm.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124860671","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910003
P. Andretzky, R. Lampalzer, K. Veit, L. Cloutot, G. Hausler
Summary form only. Geometrical data about surface shape or volume structure are helpful for medical diagnostics. We will discuss sensors with micrometer resolution and tomographic capabilities. For use in dermatologic applications, sensors with 10 micrometers resolution; for dental applications and sensors with 200 micrometers resolution.
{"title":"Optical 3d-sensors for medical diagnostics","authors":"P. Andretzky, R. Lampalzer, K. Veit, L. Cloutot, G. Hausler","doi":"10.1109/CLEOE.2000.910003","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910003","url":null,"abstract":"Summary form only. Geometrical data about surface shape or volume structure are helpful for medical diagnostics. We will discuss sensors with micrometer resolution and tomographic capabilities. For use in dermatologic applications, sensors with 10 micrometers resolution; for dental applications and sensors with 200 micrometers resolution.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129431105","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910071
P. Neves, M. Arronte, R. Vilar
Summary form only given. In this work, experimental measurements of cleaning efficiency for three different metallic particulate contaminants (Au, 1.2 /spl mu/m; Cu 3 /spl mu/m and W 0.7 /spl mu/m) on silicon are reported. To study the dependence of cleaning efficiency on the type of contaminant, absorption of laser radiation by particles and substrate is considered. The shadow effect of the metallic particles on the substrate imposes a bidimensional analysis of the temperature profile in the substrate.
{"title":"Laser micron particle removal from silicon surfaces: a bidimensional approach","authors":"P. Neves, M. Arronte, R. Vilar","doi":"10.1109/CLEOE.2000.910071","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910071","url":null,"abstract":"Summary form only given. In this work, experimental measurements of cleaning efficiency for three different metallic particulate contaminants (Au, 1.2 /spl mu/m; Cu 3 /spl mu/m and W 0.7 /spl mu/m) on silicon are reported. To study the dependence of cleaning efficiency on the type of contaminant, absorption of laser radiation by particles and substrate is considered. The shadow effect of the metallic particles on the substrate imposes a bidimensional analysis of the temperature profile in the substrate.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128305486","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910198
P. López, M. Balsi, D. L. Vilariño, D. Cabello
Summary form only given. Active IR polarimetric sensing has been successfully applied for the remote sensing of man made objects and, particular, of buried mines. However, the scattering and power/SNR constraints require near overhead viewing. In contrast, passive polarimetric sensing allows detection with much more operationally convenient arrangements which is highly desirable when working in mined lands. In this work, an approach for detecting buried antipersonnel mines based on the dynamic behaviour difference is presented. The basic idea consists of using a sequence of images of the same piece of land at different time intervals which are applied as the input of a reconfigurable cellular neural network (CNN) architecture. Then, a learning algorithm is applied that optimizes both the network parameters and the network topology that best fit the desired behaviour.
{"title":"Passive IR polarimetric remote sensing of antipersonnel mines using cellular neural networks","authors":"P. López, M. Balsi, D. L. Vilariño, D. Cabello","doi":"10.1109/CLEOE.2000.910198","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910198","url":null,"abstract":"Summary form only given. Active IR polarimetric sensing has been successfully applied for the remote sensing of man made objects and, particular, of buried mines. However, the scattering and power/SNR constraints require near overhead viewing. In contrast, passive polarimetric sensing allows detection with much more operationally convenient arrangements which is highly desirable when working in mined lands. In this work, an approach for detecting buried antipersonnel mines based on the dynamic behaviour difference is presented. The basic idea consists of using a sequence of images of the same piece of land at different time intervals which are applied as the input of a reconfigurable cellular neural network (CNN) architecture. Then, a learning algorithm is applied that optimizes both the network parameters and the network topology that best fit the desired behaviour.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129563888","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910146
J. Ares, J. Arines, S. Bará
Summary form only. The Shack-Hartmann wavefront sensor is becoming nowadays a popular optical laboratory tool. Its inherent mechanical properties and conceptual simplicity and the possibility of working even with non monochromatic light sources, are its main advantages in the field of wavefront sensors. In this work we introduce the use of a Shack-Hartmann (SH) sensor as a positioning device. As the lateral shearing interferometer the Shack-Hartmann sensor can achieve a multiple range superresolution compared to the Rayleigh depth of focus. It belongs to a class of optical devices which estimate the shape of an incoming wavefront from a set of measurements of its local slopes.
{"title":"Positioning sensing with a Shack-Hartmann wavefront sensor","authors":"J. Ares, J. Arines, S. Bará","doi":"10.1109/CLEOE.2000.910146","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910146","url":null,"abstract":"Summary form only. The Shack-Hartmann wavefront sensor is becoming nowadays a popular optical laboratory tool. Its inherent mechanical properties and conceptual simplicity and the possibility of working even with non monochromatic light sources, are its main advantages in the field of wavefront sensors. In this work we introduce the use of a Shack-Hartmann (SH) sensor as a positioning device. As the lateral shearing interferometer the Shack-Hartmann sensor can achieve a multiple range superresolution compared to the Rayleigh depth of focus. It belongs to a class of optical devices which estimate the shape of an incoming wavefront from a set of measurements of its local slopes.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127389137","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909933
U. Griebner, M. Leitner, P. Glas, B. Ozygus, R. Hey, I. Daweritz
Summary form only given. We report on laser action of an end-on diode-pumped Nd:YAG laser mode-locked by a multiple quantum well (MQW) saturable absorber. The absorber is especially designed to give a high modulation depth. The air cooled Nd:YAG gain-module, pumped by 18 W of fiber coupled diode emission delivers in a very compact configuration 6W of cw output power. This gain module is applied in a four-mirror type-Z cavity including a semiconductor saturable absorber mirror (SESAM).
{"title":"Compact semiconductor absorber mode-locked Nd:YAG laser","authors":"U. Griebner, M. Leitner, P. Glas, B. Ozygus, R. Hey, I. Daweritz","doi":"10.1109/CLEOE.2000.909933","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909933","url":null,"abstract":"Summary form only given. We report on laser action of an end-on diode-pumped Nd:YAG laser mode-locked by a multiple quantum well (MQW) saturable absorber. The absorber is especially designed to give a high modulation depth. The air cooled Nd:YAG gain-module, pumped by 18 W of fiber coupled diode emission delivers in a very compact configuration 6W of cw output power. This gain module is applied in a four-mirror type-Z cavity including a semiconductor saturable absorber mirror (SESAM).","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127435234","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909911
Wen-Fung Liu, I. Liu, L. Chung, Ding-Wei Huang, C.C. Yang
Summary form only given. In this paper, we report a novel implementation for WDM add/drop multiplexing application based on acoustically modulated fiber Bragg grating. We use acoustic waves to excite lateral vibration and hence micro-bending of the fiber grating. By appropriately controlling the period of the micro-bending, the coupling between the core modes and certain cladding modes in the fiber is produced. Through such mechanisms, we can select the reflection window by switching on/off the acoustic wave.
{"title":"Cladding-core mode coupling in a fiber Bragg grating controlled by acoustics for multiplexing application","authors":"Wen-Fung Liu, I. Liu, L. Chung, Ding-Wei Huang, C.C. Yang","doi":"10.1109/CLEOE.2000.909911","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909911","url":null,"abstract":"Summary form only given. In this paper, we report a novel implementation for WDM add/drop multiplexing application based on acoustically modulated fiber Bragg grating. We use acoustic waves to excite lateral vibration and hence micro-bending of the fiber grating. By appropriately controlling the period of the micro-bending, the coupling between the core modes and certain cladding modes in the fiber is produced. Through such mechanisms, we can select the reflection window by switching on/off the acoustic wave.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128950085","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909719
K. Richardson, C. Lopez, A. Graham, A. Schulte, C. Rivero, S. Seal, D. K. Verma, K. Turcotte, A. Saliminia, T. Galstian, A. Villeneuve
Summary form only given. Chalcogenide (ChG) glasses have been widely investigated as candidate materials for waveguide applications and we have recently reported on optical properties of bulk materials and their use in undoped and rare-earth doped films. Current efforts in our group to examine property differences introduced to these glasses during film deposition have shown notable structural and chemical variation to the parent bulk glass material. Most recently, we have expanded our capabilities to structurally characterize single and multiple layer films suitable for use in devices. It is our objective to understand how structural and chemical changes affect linear and nonlinear optical behavior of these elements.
{"title":"Fabrication and properties of chalcogenide glasses for planar waveguides","authors":"K. Richardson, C. Lopez, A. Graham, A. Schulte, C. Rivero, S. Seal, D. K. Verma, K. Turcotte, A. Saliminia, T. Galstian, A. Villeneuve","doi":"10.1109/CLEOE.2000.909719","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909719","url":null,"abstract":"Summary form only given. Chalcogenide (ChG) glasses have been widely investigated as candidate materials for waveguide applications and we have recently reported on optical properties of bulk materials and their use in undoped and rare-earth doped films. Current efforts in our group to examine property differences introduced to these glasses during film deposition have shown notable structural and chemical variation to the parent bulk glass material. Most recently, we have expanded our capabilities to structurally characterize single and multiple layer films suitable for use in devices. It is our objective to understand how structural and chemical changes affect linear and nonlinear optical behavior of these elements.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129295686","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910141
P. Maksimyak, O. Angelsky
Summary form only given. We propose an interference method based on a shearing polarisation interferometer for measuring surface roughness. It is based on the RPS approach, which preassumes: (i) infinitely extended object (all spatial frequency components of the radiation scattered by the object are present in registration zone); (ii) phase variance of the object is small; (iii) the correlation length of the inhomogeneity is larger than the wavelength.
{"title":"Interference device for roughness measurement","authors":"P. Maksimyak, O. Angelsky","doi":"10.1109/CLEOE.2000.910141","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910141","url":null,"abstract":"Summary form only given. We propose an interference method based on a shearing polarisation interferometer for measuring surface roughness. It is based on the RPS approach, which preassumes: (i) infinitely extended object (all spatial frequency components of the radiation scattered by the object are present in registration zone); (ii) phase variance of the object is small; (iii) the correlation length of the inhomogeneity is larger than the wavelength.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130657161","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909753
E. Lebiush, R. Lavi, Y. Tzuk, N. Angert, A. Gachechiladze, M. Tseitlin, A. Zharov, M. Roth
Summary form only given. A high repetition rate Nd:YVO/sub 4/ laser with an RbTiOPO/sub 4/ (RTP) based electro-optic Q-switch was developed. The repetition rates achieved were up-to 751 kHz.
{"title":"High repetition rate end-pumped electro-optic RTP Q-switch Nd:YVO/sub 4/ laser","authors":"E. Lebiush, R. Lavi, Y. Tzuk, N. Angert, A. Gachechiladze, M. Tseitlin, A. Zharov, M. Roth","doi":"10.1109/CLEOE.2000.909753","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909753","url":null,"abstract":"Summary form only given. A high repetition rate Nd:YVO/sub 4/ laser with an RbTiOPO/sub 4/ (RTP) based electro-optic Q-switch was developed. The repetition rates achieved were up-to 751 kHz.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496497","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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