Author
Diana Tentori
Bio: Diana Tentori is an academic researcher from Ensenada Center for Scientific Research and Higher Education. The author has contributed to research in topics: Birefringence & Optical fiber. The author has an hindex of 10, co-authored 49 publications receiving 322 citations.
Papers published on a yearly basis
Papers
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TL;DR: A method that combines an interferometric technique with wavelength scanning and permits a precise nondestructive measurement of the birefringence along different sections of a long optical fiber is described.
Abstract: We describe a method for measuring modal birefringence in optical fibers. It combines an interferometric technique with wavelength scanning and permits a precise nondestructive measurement of the birefringence along different sections of a long optical fiber. The experimental results for high-birefringence fibers, 10 and 100 m long, are presented. An accuracy of approximately 0.1% is achieved in the spectral range of 600–850 nm.
75 citations
TL;DR: In this article, a demodulation algorithm for sensors consisting of two Bragg gratings separated by a short distance is presented, which works as an unbalanced interferometer sensitive to temperature or axial strain variations.
43 citations
TL;DR: This work applied the birefringence matrix developed for a twisted fiber to the description of the output state of polarization measured for three commercial fibers that due to its higher rigidity present stronger bireFringence changes when twisted.
Abstract: In this work we analyze the birefringence matrix developed for a twisted fiber in order to identify the basic optical effects that define its birefringence. The study was performed using differential Jones calculus. The resultant differential matrix showed three independent types of birefringence: circular, linear at 0 degrees and linear at 45 degrees (Jones birefringence). We applied this birefringence matrix to the description of the output state of polarization measured for three commercial fibers that due to its higher rigidity present stronger birefringence changes when twisted. The torsion applied to the erbium-doped fiber samples varied from 0 to 1440 degrees.
19 citations
TL;DR: In this paper, the spectral birefringence characterization of singlemode erbium-doped fibers within the amplification band was investigated using the same optical set up and the predicted polarization eigenmodes.
18 citations
TL;DR: Experimental results demonstrate that, when birefringence dispersion is taken into account, more than 300 elements can be resolved along the fiber.
Abstract: A new technique for distributed fiber-optic sensing is described. It is a wavelength-scanning method that uses, as a sensing element, a polarization-maintaining fiber illuminated with a white-light source. The distribution of the mode-coupling coefficient is determined by a new digital procedure with a fast-Fourier-transform algorithm. Experimental results demonstrate that, when birefringence dispersion is taken into account, more than 300 elements can be resolved along the fiber.
18 citations
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01 Jan 2002
TL;DR: In this article, it is shown that fluctuations in the polarization mode and fiber birefringence produced by the environment lead to dispersion that varies statistically with time and frequency.
Abstract: Publisher Summary Polarization mode dispersion (PMD) is a linear effect that can be compensated in principle. In an ideal circularly symmetric fiber, the two orthogonally polarized modes have the same group delay. However, in reality, fibers exhibit a certain amount of birefringence because of imperfections in the manufacturing process or mechanical stress on the fiber after manufacture. It is noted that fluctuations in the polarization mode and fiber birefringence produced by the environment lead to dispersion that varies statistically with time and frequency. PMD causes different delays for different polarizations and when the difference in the delays approaches a significant fraction of the bit period, it leads to pulse distortion and system penalties. Environmental changes— including temperature and stress—cause the fiber PMD to vary stochastically in time. PMD, illustrating the basic concepts, the measurement techniques, the PMD measurement, the PMD statistics for first- and higher orders, the PMD simulation and emulation, the system impairments, and the mitigation methods has been summarized in the chapter. Both the optical and the electrical PMD compensations are considered.
315 citations
TL;DR: In this paper, the nonlinear susceptibility of the investigated molecule induced by pump and Stokes laser beams employed in the CARS technique is discussed, and the relation between the non-linear susceptibility, the different CARS laser intensities and the phase matching condition between them is also presented.
94 citations
TL;DR: In this paper, the authors measured the equalization wavelength as a function of the displacement in the Michelson interferometer by a low-resolution miniature fiber-optic spectrometer and confirmed that the group refractive index dispersion in the beam splitter made of fused silica agrees well with that resulting from the Sellmeier dispersion equation.
92 citations
TL;DR: An overview of basic approaches and a review of current state-of-the-art in fiber optic sensors for measurements of torsion, twist and/or rotation are provided.
Abstract: Optical measurement of mechanical parameters is gaining significant commercial interest in different industry sectors. Torsion, twist and rotation are among the very frequently measured mechanical parameters. Recently, twist/torsion/rotation sensors have become a topic of intense fiber-optic sensor research. Various sensing concepts have been reported. Many of those have different properties and performances, and many of them still need to be proven in out-of-the laboratory use. This paper provides an overview of basic approaches and a review of current state-of-the-art in fiber optic sensors for measurements of torsion, twist and/or rotation.Invited Paper.
90 citations