[PDF] Top 20 Estudio de la factibilidad para la creación de un centro de asesoría contable tributaria para los micro y pequeños empresarios del Cantón Naranjito

... of femtosecond laser inscribed LPGs in conventional single mode fibers [12], it was anticipated that devices would be strongly polarization dependent and so the light used to monitor the grating ... See full document

... and sensing properties of long period grating photonic crystal fibers ...the fiber is immersed into a liquid with a refractive index close to that of the ... See full document

... so sensing alcohol is a great issue. Sensing properties of alcohol highly depend on its concentration as well as in which temperature it is measured [18] [19] ... See full document

... intensity femtosecond laser sources for inscribing fibre gratings has attained significant ...optical sensing LPGs written in photonic crystal fibre have a distinct advantage of ... See full document

... Long-period fiber gratings (LPGs) have been of interest to optical communication systems and optical sensors because of their various advantages, such as wavelength- selective nature, mass ... See full document

... Long-period fiber gratings (LPGs) have attracted much attention in optical communication systems and optical sensors because of their many advantages, such as low cost, ease of fabrication, ... See full document

... asymmetrically inscribed LPGs in the PCF generate some attenuation bands which display a clear directional sensitivity (figure 9a), whilst others are much closer to giving a symmetrical response (figure ... See full document

... in photonic crys- tal fiber (PCF) is an intensively research topic in optical and photonic science in the last decade ...ytterbium fiber (Yb:fiber) laser system has the merits of high ... See full document

... dispersion properties make these fibers attractive for many nonlinear applications of which super continuum(SC) generation has been the most intensively investigated and this has been used in application like ... See full document

... (UV) laser exposure, is the preferred technique because of its ease of fabrication and mass ...the fiber needs to pass through a process of sensitization before manufacturing the ...2 laser ... See full document

... Ti:sapphire laser system providing 120 fs pulses at 796 nm and 1 kHz of repetition ...The laser beam was focused with a 10⫻ microscope objective 共numerical aperture, NA = ...writing femtosecond ... See full document

... in photonic crystal fibers, the light propagation consequence is some- what different ...and photonic band gap guiding. For both types of PCF, specific fiber properties like effective ... See full document

... m which gave -nm shift in the center wavelength and -dB changes in strength due to polarization variations. Second, the behavior of a pair of the bend induced attenuation bands of the LPG was investigated with m which ... See full document

... Dr. Dharmendra K Singh is presently working as Head, Department of Electronics and Communication & Information Technology, BIT Sindri, Dhanbad. He has more than 20 years of teaching experience. He is heading the ... See full document

... fibre long period grating (LPG) is an axially periodic refractive index variation inscribed in an optical fibre, usually by ultra-violet ...of sensing through their sensitivities to strain, ... See full document

... Photonic crystal fibers (PCFs) are characterized by an array of air holes running along the entire fiber length, which provides for the confinement and guidance of ...optical properties [1],[2] ... See full document

... two photonic crysta s in the same structure can result in the overlapping of the modes from the two photonic crysta s present in the structure or creation of new modes which are generated by the coupling of ... See full document

... decreases), the first ZDWs of the dispersion curves for both modes become red shifted while the second ZDWs are blue shifted and the dispersion slope also decreases. A significant point is that the separation between the ... See full document

... To investigate of our proposed hexagonal photonic crystal fiber properties we used finite element method (FEM). Boundary condition of circular perfectly matched layers (PML) is used to achieve ... See full document

... Figure 1. Nanovoid array SP sensor produced via direct ablation-free laser printing. (a) Side-view (view angle of 45 ◦ ) SEM images of a nanovoid array printed at 0.8 µm lattice periodicity (top); a close-up ... See full document