OPTICAL TWEEZERS: Characterization and Systems
... the direction of light rays A and B. The resultant gradient force vector, Fnet , (shown in Figure 1.1(a)) is towards the ray A as it has a higher intensity than ray B due to a Gaussian intensity profile. In [3] it was shown that the gradient force for dielectric particles can be large enough to domi ...
... the direction of light rays A and B. The resultant gradient force vector, Fnet , (shown in Figure 1.1(a)) is towards the ray A as it has a higher intensity than ray B due to a Gaussian intensity profile. In [3] it was shown that the gradient force for dielectric particles can be large enough to domi ...
UNIT-4 OCN
... effective input pulse width. • The fiber is generally cut back to the lesser of 10 m or 1% of its original length. • As an alternative to this cut-back technique, the insertion or substitution method similar to that used in fiber loss measurement can be employed. • This method has the benefit of bei ...
... effective input pulse width. • The fiber is generally cut back to the lesser of 10 m or 1% of its original length. • As an alternative to this cut-back technique, the insertion or substitution method similar to that used in fiber loss measurement can be employed. • This method has the benefit of bei ...
Stable higher-charge discrete vortices in hexagonal optical lattices
... 关5–11兴. In particular, in the framework of the continuous nonlinear model of optically induced lattices generated in saturable nonlinear media, we analyze the existence, stability, and dynamical properties of discrete optical vortices for the case of hexagonal optical lattices. We obtain the somewha ...
... 关5–11兴. In particular, in the framework of the continuous nonlinear model of optically induced lattices generated in saturable nonlinear media, we analyze the existence, stability, and dynamical properties of discrete optical vortices for the case of hexagonal optical lattices. We obtain the somewha ...
OPTICAL MINERALOGY-2
... If instead of using a calcite rhomb we had used a slab of calcite which had been cut in a random orientation and placed that on the dots, two images would still appear. ...
... If instead of using a calcite rhomb we had used a slab of calcite which had been cut in a random orientation and placed that on the dots, two images would still appear. ...
Second Harmonic Generation Technique and its Applications
... As we already mentioned, the principal requirement for the material is the lack of the center of inversion, except in some isolated cases where the SHG was also observed in centrosymmetric materials, such as phthalocyanines [19] and fullerene C60 thin films [20–25] as due to the quadrupolar, magneti ...
... As we already mentioned, the principal requirement for the material is the lack of the center of inversion, except in some isolated cases where the SHG was also observed in centrosymmetric materials, such as phthalocyanines [19] and fullerene C60 thin films [20–25] as due to the quadrupolar, magneti ...
Lecture Note No. 3 Reflection and Refraction (Sections 4.3 to 4.8)
... Ferma’s Principle … The beam path between two points takes one that needs the least travel time, or shortest optical path length (OPL ns ds n j s j ). The resulting travel time is b ...
... Ferma’s Principle … The beam path between two points takes one that needs the least travel time, or shortest optical path length (OPL ns ds n j s j ). The resulting travel time is b ...
Long period grating based biosensor for the detection of Escherichia
... transmission spectrum right from this stage. After the PBS buffer washed LPFGs, LPFGs were incubated in different concentrations of E. coli B bacteria for 20 min, and were finally rinsed again with the PBS buffer. Here, we would like to mention that since bacteriophage is easy and cheap to produce an ...
... transmission spectrum right from this stage. After the PBS buffer washed LPFGs, LPFGs were incubated in different concentrations of E. coli B bacteria for 20 min, and were finally rinsed again with the PBS buffer. Here, we would like to mention that since bacteriophage is easy and cheap to produce an ...
Recent advances in diffuse optical imaging
... over a period short enough so that the unknown coupling can be assumed to have remained constant. • Measurements of intensity alone at a single wavelength are unable to distinguish between the effects of absorption and scatter (Arridge and Lionheart 1998). Alternative types of measurements have been ...
... over a period short enough so that the unknown coupling can be assumed to have remained constant. • Measurements of intensity alone at a single wavelength are unable to distinguish between the effects of absorption and scatter (Arridge and Lionheart 1998). Alternative types of measurements have been ...
Parallelized STED fluorescence nanoscopy
... the sample and adjusting ISTED one can define the coordinate in space where the fluorophores can still assume the fluorescent state, i.e. are not 'switched off' by the enforced occupation of the ground state [9, 10]. The most common STED microscopy configuration is to overlay a diffraction-limited f ...
... the sample and adjusting ISTED one can define the coordinate in space where the fluorophores can still assume the fluorescent state, i.e. are not 'switched off' by the enforced occupation of the ground state [9, 10]. The most common STED microscopy configuration is to overlay a diffraction-limited f ...
Diffracting fractals: new paradigms in linear wave physics
... Figure 5: Diffraction of the Weierstrass fractal function [Eq. (1)] with random phases for different values of the dimension D at a single slit when D = 1.99. (a) NF = 5, (b) NF = 10, (c) NF = 30, (d) NF = 50. Other parameters: = 1.2, /a = 1.0, L/k = 1, and = 0.1. Shaded areas denote geometric ...
... Figure 5: Diffraction of the Weierstrass fractal function [Eq. (1)] with random phases for different values of the dimension D at a single slit when D = 1.99. (a) NF = 5, (b) NF = 10, (c) NF = 30, (d) NF = 50. Other parameters: = 1.2, /a = 1.0, L/k = 1, and = 0.1. Shaded areas denote geometric ...
Sheets Mar 2014 - Arab Academy for Science, Technology
... 8] A typical relative refractive index difference for an optical fiber designed for long transmission is 1%. Estimate the NA and the solid acceptance angle in air for the fiber when the core index is 1.46. Further, calculate the critical angle at the core-cladding interface within the fiber. It may ...
... 8] A typical relative refractive index difference for an optical fiber designed for long transmission is 1%. Estimate the NA and the solid acceptance angle in air for the fiber when the core index is 1.46. Further, calculate the critical angle at the core-cladding interface within the fiber. It may ...
FABRY PEROT RESONATOR
... k(xR-xM)is the phase shifting of the measurement wave as opposed to the reference wave, which occurs because the path of the measuring beam through the index arm of the interferometer is longer or shorter than the path of the reference arm. This phase shifting is also known as the path difference an ...
... k(xR-xM)is the phase shifting of the measurement wave as opposed to the reference wave, which occurs because the path of the measuring beam through the index arm of the interferometer is longer or shorter than the path of the reference arm. This phase shifting is also known as the path difference an ...
Self-assembly of three-dimensional photonic-crystals with
... placement of well-defined line or point defects in the interior of the PCs, which cannot be obtained through self-assembly alone. For example, if a line defect is introduced into a photonic crystal, a wavelength (l)-scale optical waveguide can be fabricated, and such a PC waveguide can have unique p ...
... placement of well-defined line or point defects in the interior of the PCs, which cannot be obtained through self-assembly alone. For example, if a line defect is introduced into a photonic crystal, a wavelength (l)-scale optical waveguide can be fabricated, and such a PC waveguide can have unique p ...
``Interaction-free`` imaging - Vienna Center for Quantum Science and
... free space and the beam only passes through the object once. Further, it was experimentally necessary to lock the interferometers so that one port, the IFM port, was at a null. This was done with an additional laser ~a He-Ne laser at 632 nm! and a simple fringe slope locking system. Incorporation of ...
... free space and the beam only passes through the object once. Further, it was experimentally necessary to lock the interferometers so that one port, the IFM port, was at a null. This was done with an additional laser ~a He-Ne laser at 632 nm! and a simple fringe slope locking system. Incorporation of ...
Ce e cu galben reprezinta corecturi de limba/topica/inteles/gramatica
... polarization state on the fiber to measure how much the transmission data is affected. When twisting, applying stress to or bending the fiber optics, performance will be affected due to the appearance of the birefringence phenomenon. The simulations have been done on single mode and multimode optica ...
... polarization state on the fiber to measure how much the transmission data is affected. When twisting, applying stress to or bending the fiber optics, performance will be affected due to the appearance of the birefringence phenomenon. The simulations have been done on single mode and multimode optica ...
PDF
... each active device. Prior work has demonstrated that spatial profiling of the surface temperature of individual active optoelectronic devices using micro-thermocouples can be used to determine the internal optical power distribution and to characterize optical properties such as gain, quantum effici ...
... each active device. Prior work has demonstrated that spatial profiling of the surface temperature of individual active optoelectronic devices using micro-thermocouples can be used to determine the internal optical power distribution and to characterize optical properties such as gain, quantum effici ...
Coupling Efficiency and Alignment Sensitivity of Single
... here assumes that the dielectric rod or core diameter, 2a, is large compared to the wavelength. ...
... here assumes that the dielectric rod or core diameter, 2a, is large compared to the wavelength. ...
Phase-matching and nonlinear optical processes - jalali
... crystal structure, and the lack of efficient optical transitions due to the indirect band structure, have contributed to the premature perception of silicon being useful only as an optically passive material. Recently, we have proposed and demonstrated the use of Raman effect to achieve active optic ...
... crystal structure, and the lack of efficient optical transitions due to the indirect band structure, have contributed to the premature perception of silicon being useful only as an optically passive material. Recently, we have proposed and demonstrated the use of Raman effect to achieve active optic ...
Optical aberration
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An optical aberration is a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements.Aberration leads to blurring of the image produced by an image-forming optical system. Makers of optical instruments need to correct optical systems to compensate for aberration.The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays.