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Symposium on Optics in Industry最新文献

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Solutions for stability and astigmatism in high power laser resonators 高功率激光谐振器稳定性和散光的解决方案
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.848677
R. Narro, M. Arronte, E. Posada, Luis Ponce, E. Rodriguez
{"title":"Solutions for stability and astigmatism in high power laser resonators","authors":"R. Narro, M. Arronte, E. Posada, Luis Ponce, E. Rodriguez","doi":"10.1117/12.848677","DOIUrl":"https://doi.org/10.1117/12.848677","url":null,"abstract":"A method is proposed for the design of fundamental mode high power resonators, with joined stability zones. A parameter is created which gives the minimum length a laser resonator should have while having at the same time the broadest stabilities zones. For multimode and large mode volume resonators, a configuration is introduced for maximizing the laser overall efficiency due to the compensation of the astigmatism induced by the flash lamp pumping heating. The later configuration proposes a dual-active medium resonator, with 90 degree rotation around the optical axis between the astigmatic thermal lenses of the mediums. The reliability of this configuration is corroborated experimentally using a Nd:YAG dual-active medium resonator. It is found that in the pumping power range where the astigmatism compensation is possible, the overall efficiency is constant, even when increasing the excitation power with the consequent increase of the thermal lens dioptric power.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131348801","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
Surface structure changes in cement paste exposed to 10.6μm laser radiation 10.6μm激光辐照下水泥浆体表面结构的变化
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.852953
J. J. Soto-Bernal, M. R. Moreno-Virgen, C. Frausto-Reyes, A. Bonilla-Petriciolet, J. Vega-Durán, J. Pineda-Piñón, J. A. Ortiz-Lozano
{"title":"Surface structure changes in cement paste exposed to 10.6μm laser radiation","authors":"J. J. Soto-Bernal, M. R. Moreno-Virgen, C. Frausto-Reyes, A. Bonilla-Petriciolet, J. Vega-Durán, J. Pineda-Piñón, J. A. Ortiz-Lozano","doi":"10.1117/12.852953","DOIUrl":"https://doi.org/10.1117/12.852953","url":null,"abstract":"We report the changes occurring in cement pastes irradiated by 10.6μm CO2 laser at different stages of hydration. Raman spectroscopy, X-rays and Scanning Electronic Microscopy (SEM) techniques had been used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm-1, 563cm-1, 695cm-1, 750cm-1, 897cm-1, 1042cm-1 and 1159cm-1 that corresponds to compounds already presents in cement pastes. X ray diffraction and SEM images confirm the recrystalization of cement paste compounds into new phases (alite and belite) after irradiation. The produced changes show a clear dependence on the applied laser power density and age of samples.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"7499 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130338584","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
New paradigms in LED photometry and colorimetry LED光度和比色法的新范例
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.848783
A. Estrada-Hernández, L. González-Galván, E. Rosas
{"title":"New paradigms in LED photometry and colorimetry","authors":"A. Estrada-Hernández, L. González-Galván, E. Rosas","doi":"10.1117/12.848783","DOIUrl":"https://doi.org/10.1117/12.848783","url":null,"abstract":"Motivated by the growing number of applications the light emitting diodes, LEDs, are having in solid-state lighting systems, we summarize the new internationally standardized measurement methods for photometric and colorimetric quantities in LEDs; since they are commonly used to quantify some of the key performance parameters of several products used in automotive industry, traffic signaling, etc. Finally, special emphasis is given to the mismatch corrections factors calculation, and its use when measuring LEDs photometric and colorimetric quantities.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122027618","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: 2
Directional filters for fringe pattern denoising 用于条纹图案去噪的方向滤波器
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.849339
J. Villa, J. A. Quiroga, I. de la Rosa
{"title":"Directional filters for fringe pattern denoising","authors":"J. Villa, J. A. Quiroga, I. de la Rosa","doi":"10.1117/12.849339","DOIUrl":"https://doi.org/10.1117/12.849339","url":null,"abstract":"For a successful phase demodulation it is important to have a good quality fringe pattern image. For this reason preprocessing fringe patterns is, many times, an unavoidable task. Often, noise removal is the main problem to be solved, however, the use of ordinary linear filters is not always a proper procedure specially in the presence of high density fringes because the signal and noise are mixed in the Fourier space. Also, as fringe pattern images are two-dimensional functions, frequencies are two-component vectors which requires consider the filtering direction. We present a new denoising technique for preprocessing fringe pattern images which requires to previously estimate the fringe orientation. For cases of high noise levels we modify the proposed technique by means of a regularized local cost function in order to get a better noise response. We present a noise response analysis of the proposed technique, some experimental results and its application to wrapped phase maps denoising.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115340981","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: 2
Itoh algorithm to unwrap 2D phase Itoh算法展开二维相位
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.851057
G. Domínguez-Guzmán, J. Castillo-Mixcóatl, G. Beltrán-Pérez, S. Muñoz-Aguirre
{"title":"Itoh algorithm to unwrap 2D phase","authors":"G. Domínguez-Guzmán, J. Castillo-Mixcóatl, G. Beltrán-Pérez, S. Muñoz-Aguirre","doi":"10.1117/12.851057","DOIUrl":"https://doi.org/10.1117/12.851057","url":null,"abstract":"The fringes projection technique allows evaluating 3D profiles from testing objects without contact. To obtain those profiles it is necessary to get a photograph of the projected fringes. This image contains the information of the profile testing object as a deformation of the projected fringes. In order to evaluate the profile it is necessary to extract the phase from image fringes, usually this process requires an arctan()function. As is well known this function is limited by ±π and as a result the called wrapped phase is obtain. Therefore in order to get the real phase an unwrapping technique must be employed. In this work experimental and theoretical results of implementation of Itoh algorithm to unwrap phase are shown. This algorithm was written in MatLab and results show that this technique is suitable to measure profiles using fringes projection if images obtained are free of shadows or if the sampling satisfies Nyquist theorem.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"9 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122719231","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
Automation of a dynamic system to measure response of quartz crystal microbalance gas sensors 石英晶体微天平气体传感器响应动态测量系统的自动化
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.851109
D. L. Osorio-Arrieta, S. Muñoz-Aguirre, G. Beltrán-Pérez, J. Castillo-Mixcóatl, J. Rivera de la Rosa
{"title":"Automation of a dynamic system to measure response of quartz crystal microbalance gas sensors","authors":"D. L. Osorio-Arrieta, S. Muñoz-Aguirre, G. Beltrán-Pérez, J. Castillo-Mixcóatl, J. Rivera de la Rosa","doi":"10.1117/12.851109","DOIUrl":"https://doi.org/10.1117/12.851109","url":null,"abstract":"In the present work, automation of a dynamic system to measure response of gas sensors based on quartz crystal microbalance (QCM) is presented. Automation was used to study transient response, which is necessary for sensor characterization. A valves system, which controls the gas flow towards the sensor, was implemented to generate the step function. The system was fully automated by using a PIC16F877 microcontroller. Results of sensor response measurements are presented.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124735935","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: 1
Simulation of Fabry-Perot cavities in a Michelson interferometer michael - son干涉仪中Fabry-Perot空腔的模拟
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.851133
L. Aguilar-Lobo, C. Moreno, G. Garcia-Torales
{"title":"Simulation of Fabry-Perot cavities in a Michelson interferometer","authors":"L. Aguilar-Lobo, C. Moreno, G. Garcia-Torales","doi":"10.1117/12.851133","DOIUrl":"https://doi.org/10.1117/12.851133","url":null,"abstract":"The Laser Interferometer Gravitational-Wave Observatory (LIGO) has designed to detect Gravitational Waves (GW); its system of detection is based on the Michelson interferometer configuration. When a GW hit on it, the optical elements are disturbed inducing a change in the optical path difference (OPD). The arms length in the detector should be of hundreds of kilometers, due to the small value of the expected GW intensity (h ≈10-21). This length values are not so easy to achieve because many factors, such as source noise and the profile of the earth. In order to increase the optical path of the beam, LIGO team has implemented a Fabry-Perot cavity in each arm, improving the interferometer response, such as laser amplification and noise reduction. We has build of a prototype of Michelson interferometer for show of a simple way the operation mechanism of the GW detectors and open new researches in this area. Now, we will implement a Fabry-Perot cavity in each arm of our prototype. In this work, we are showed the theoretical features and the simulation of the Fabry-Perot cavity response.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124220295","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
Coherent photodetection with applications in quantum communications and cryptography 相干光探测在量子通信和密码学中的应用
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.848861
F. Mendieta, A. Arvizu, R. Muraoka, P. Gallion, J. Sánchez
{"title":"Coherent photodetection with applications in quantum communications and cryptography","authors":"F. Mendieta, A. Arvizu, R. Muraoka, P. Gallion, J. Sánchez","doi":"10.1117/12.848861","DOIUrl":"https://doi.org/10.1117/12.848861","url":null,"abstract":"We present an application of coherent homodyne detection to the problem of low photon number communications and cryptography. As the coherent demodulation of an optical field requires the measurement of its (non commutating) inphase and quadrature components, we present the structure and operation of an 8-port optical hybrid comprising 2 balanced homodyne detection structures, for the simultaneous measurement of the 2 quadratures. We analyze this receiver operating with a strong local oscillator field, when the received field is in weak coherent states, with digital phase modulation: we obtain the homodyne statistics and the uncertainty product in the presence of vacuum noises from the input signal port and unused ports and discuss the increase in uncertainty due to the simultaneous measurements of the quadratures. We obtain the signal to noise ratio as well of the bit error rate performance for binary phase shift keying and discuss the departure from the standard quantum limit.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133145819","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: 2
Laser induced micro-cracks formation inside the glass, LIBS, and PILA measurements 激光诱导玻璃内部微裂纹形成，LIBS和PILA测量
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.848981
R. Reynaud, L. Ponce, M. Arronte, E. de Posada, E. Rodriguez, T. Flores
{"title":"Laser induced micro-cracks formation inside the glass, LIBS, and PILA measurements","authors":"R. Reynaud, L. Ponce, M. Arronte, E. de Posada, E. Rodriguez, T. Flores","doi":"10.1117/12.848981","DOIUrl":"https://doi.org/10.1117/12.848981","url":null,"abstract":"An experimental measurement by using Laser Induced Breakdown Spectroscopy (LIBS) and Photoacoustic Induced by Laser Ablation (PILA), in order to monitoring the microcraks formation inside the glass induced by laser pulses is presented in this work. The laser was operated in both single pulse and multi-pulse Q:Switched regime using a passive Cr:YAG crystal as switching element. The LIBS spectra captured inside the glass avoid identifying the sample composition without influence of surrounding atmosphere like occurs if the spectra are obtained on the surface. On the other hand, the PILA signal permits to monitor the process and its dependence from the number and intensity of micro-pulses.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128233632","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: 1
Twist-induced birefringence in fibers and optical rotation 光纤中的扭致双折射和光旋
Symposium on Optics in Industry Pub Date : 2009-09-26 DOI: 10.1117/12.843817
D. Tentori, C. Ayala-Díaz, F. Treviño-Martínez
{"title":"Twist-induced birefringence in fibers and optical rotation","authors":"D. Tentori, C. Ayala-Díaz, F. Treviño-Martínez","doi":"10.1117/12.843817","DOIUrl":"https://doi.org/10.1117/12.843817","url":null,"abstract":"In this work we present experimental results of the twist-induced birefringence changes for a single-mode erbium-doped fiber with uniform residual birefringence. Two polarimetric methods were used in this study. Both discern evolution of the azimuth and ellipticity angles of the output polarization state. According to these results when the initial residual birefringence is elliptical, the modified optical anisotropy does not enhance its optical activity.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114308448","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: 5
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