{"title":"Color tunable hybrid lamp: LED-incandescent and LED-fluorescent","authors":"Ivan Moreno","doi":"10.1117/12.742582","DOIUrl":"https://doi.org/10.1117/12.742582","url":null,"abstract":"Light-emitting diodes (LEDs) can be chosen to emit light in a wide variety of highly saturated colors. As a consequence, a hybrid lamp assembled with colored LEDs and with one incandescent or fluorescent source easily allows the user to dynamically select the desired color point without additional filters, with high color rendering index, and at a low cost. We measure some properties of a color tunable lamp that uses both colored LEDs and an incandescent or a fluorescent source. For the LED-incandescent type, we assemble an array of blue LEDs with a typical incandescent bulb source, and to assemble a LED-fluorescent type we used an array of red LEDs with a commercially available compact fluorescent lamp. Incandescent and fluorescent sources have a fixed intensity, while LED intensities are adjusted to tune color. For LED-incandescent lamps, our experimental data show that the correlated color temperature (CCT) can be linearly tuned with the electric current of the LED array. The LED-fluorescent lamp exhibits a CCT that exponentially varies with the drive current of red LEDs.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124830170","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}
G. Beltrán-Pérez, Liliana Jacobo Aispuro, Froylan Lucian Rocha, J. Castillo Mixcóatl, S. Múñoz Aguirre
{"title":"Optical fiber laser of multifrequency emission","authors":"G. Beltrán-Pérez, Liliana Jacobo Aispuro, Froylan Lucian Rocha, J. Castillo Mixcóatl, S. Múñoz Aguirre","doi":"10.1117/12.742592","DOIUrl":"https://doi.org/10.1117/12.742592","url":null,"abstract":"The wavelength division multiplexor (WDM) has a great importance in the technology of the communications by optical fiber, is an economic and efficient form, to increase the capacity of transmission by several orders of magnitude, reason why it is desirable to have laser sources of multiple wavelengths in a system WDM, which, according to reported works, have been obtained using diverse types of filters. In this work we presented a laser of multifrequency emission, of Erbium doped optical fiber, tuned with an optical fiber filter. The configuration of the optical filter, presents high stability and low lost by insertion, independence to the changes of polarization, low powers of light entrance, and has an useful spectral wide. It has the advantage to have a simple design and easy manufacture in addition to his low losses.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116222673","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":"Multicavity wave resonator design using chaos studies","authors":"J. A. Méndez-Bermúdez, G. Luna-Acosta","doi":"10.1117/12.742590","DOIUrl":"https://doi.org/10.1117/12.742590","url":null,"abstract":"We propose the construction of electromagnetic and electronic multicavity resonators based on the mechanism of dynamical tunneling proper of mixed chaotic systems. We use chaotic two-dimensional (2D) waveguides formed by a linear array of coupled cavities whose geometrical parameters are chosen to produce mixed phase space: chaotic regions surrounding islands of stability where ray (particle) motion is regular. Rays (particles) coming into the waveguide cannot penetrate into these islands but incoming plane waves tunnel into them at a certain discrete set of frequencies (energies) forming quasi-bound states. In this paper we demonstrate the tunneling mechanism in 2D waveguides and how it can be used to design multicavity resonators. We also discuss possible applications in the construction of microlasers and electro-optical beam splitters and switches.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114243241","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":"High precision prism scanning system","authors":"G. Garcia-Torales, J. Flores, R. X. Muñoz","doi":"10.1117/12.742275","DOIUrl":"https://doi.org/10.1117/12.742275","url":null,"abstract":"Risley prisms are commonly used in continuous scanning manner. Each prism is capable of rotating separately about a common axis at different speeds. Scanning patterns are determined by the ratios of the wedge angles, the speed and direction of rotation of both prisms. The use of this system is conceptually simple. However, mechanical action in most applications becomes a challenge often solved by the design of complex control algorithms. We propose an electronic servomotor system that controls incremental and continuous rotations of the prisms wedges by means of an auto-tuning PID control using a Adaline Neural Network Algorithm, NNA.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128672364","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":"Construction of an optical tiltmeter","authors":"A. Jaramillo-Núñez, M. Lucero-Alvarez","doi":"10.1117/12.742347","DOIUrl":"https://doi.org/10.1117/12.742347","url":null,"abstract":"In this work an optical instrument for measuring tilt is described. The device is compact, requires no special handling and can measure variations in tilt of the order of 0.5 arcsec, although this value can be suitably modified by changing the setup parameters. The instrument was developed as a tiltmeter using a liquid surface as reference surface. The inclination is obtained by measuring the longitudinal displacement of a laser beam after being reflected from the surface of the liquid. The application of the instrument for measuring the tilt of the spindle of a polishing machine of large dimensions is presented.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134235438","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}
C. Treviño-Palacios, A. Olivares-Pérez, O. J. Zapata-Nava
{"title":"Security system with optical key access","authors":"C. Treviño-Palacios, A. Olivares-Pérez, O. J. Zapata-Nava","doi":"10.1117/12.742333","DOIUrl":"https://doi.org/10.1117/12.742333","url":null,"abstract":"In this work we present a security system that uses an optical key as control access device. The optical key is a computer generated hologram (CGH) recorded using optical damage onto a transparent material using a high power pulsed laser. When we reproduce the CGH with a laser we obtain the codified image on the holographic plane. Placing a camera in this plane the reconstructed image is captured. Using a comparing program that contains the prerecorded security image the access is authorized or denied.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114766824","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":"Noise enhanced control of multistability","authors":"B. Zerega, A. N. Pisarchik","doi":"10.1117/12.742366","DOIUrl":"https://doi.org/10.1117/12.742366","url":null,"abstract":"We focus into the development of an efficient method to control multistable systems in the presence of noise. The method is based on the addition of an external control force in the form of a slow harmonic modulation with properly chosen frequency and amplitude. Although noise is usually a non desirable condition, it has been recently demostrated that in coupled systems cooperative effects of the periodic force and noise are produced. This enhancement phenomena in the response of the deterministic equations is interpreted as stochastic resonance. Our main purpose is to study deterministic resonances between the different solutions of the multistable system and the external modulation. Then, all efforts will concentrate in the enhancement of the control method produced by noise.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117075323","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}
R. Mata-Chávez, J. Estudillo-Ayala, J. Hernández-García, R. Rojas‐Laguna, G. Anzueto-Sanchez, A. Martínez-Ríos, M. Trejo-Durán, E. Alvarado-Mendez, J. Andrade-Lucio
{"title":"Design of a high voltage source to fabricate fiber optic arc induced gratings","authors":"R. Mata-Chávez, J. Estudillo-Ayala, J. Hernández-García, R. Rojas‐Laguna, G. Anzueto-Sanchez, A. Martínez-Ríos, M. Trejo-Durán, E. Alvarado-Mendez, J. Andrade-Lucio","doi":"10.1117/12.742327","DOIUrl":"https://doi.org/10.1117/12.742327","url":null,"abstract":"In this paper we propose a high voltage source which is controlled by a communication port I/O of a data acquisition card. The graphical programming language LabView is employed for this task. We make use of this source to produce optical fiber gratings by inducing an electric arc with the point by point procedure. It has a control section to modify the arc duration time and thus the voltage and current applied to the fiber by means of two electrodes. The experimental setup by which we characterized the gratings is depicted and we also present the transmitting spectrum. The gratings were fabricated with SMF-28 fiber but microstructured fiber can be exploited too. These gratings can be used with optical fiber lasers as optical filters and in the implementation of optical sensors.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123615371","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}
E. Figueroa, F. Vewinger, J. Appel, G. Günter, A. Lvovsky
{"title":"Characterization of atomic coherence decay for storage of light experiments","authors":"E. Figueroa, F. Vewinger, J. Appel, G. Günter, A. Lvovsky","doi":"10.1117/12.742560","DOIUrl":"https://doi.org/10.1117/12.742560","url":null,"abstract":"We report characterization of EIT resonances in the D1 line of Rb 87 under various experimental conditions. The dependence of the EIT linewidth on the power of the control field investigated. Strictly linear behavior between the ground levels as the main source of decoherence. We therefore formulated a new theory assuming pure dephasing to be the main decoherence mechanism. We also performed experiments where we created additional decoherence mechanisms by means of a counter-propagating repumper field. This field caused the ground-state population exchange, thus reproducing conditions in which the original theory is valid.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130110849","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":"Characterization of twisted liquid crystal spatial light modulators","authors":"U. Ruiz-Corona, Victor M. Arrizón-Peña","doi":"10.1117/12.742326","DOIUrl":"https://doi.org/10.1117/12.742326","url":null,"abstract":"A spatial light modulator (SLM) is a very useful optical tool due its versatility to be manipulated dynamically. We propose a characterization method for reflective SLMs in quasi-normal configuration. This device can work as either amplitude-mostly or phase-mostly modulator. To achieve the modulation, the SLM can be accompanied by two polarizes, or additionally using a quarter-wave plate retarder. By simulating the behaviour of the optical setup for this device; we establish an experimental Jones matrix that represent the modulator. In this work we present a more realistic modulator characterization, only assuming that the modulator Jones matrix should be unitary (the modulator do not absorb light). We report this model for characterization of the Holoeye LCR2500 SLM.","PeriodicalId":359625,"journal":{"name":"Symposium on Optics in Industry","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127836658","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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