Photodetecting Fiber Webs—Y. Fink, J. Joannopoulos
... (MRSEC) program of the NSF with use of their Shared Experimental Facilities. Modal decomposition in multimode optical waveguides plays an important role in the study of multimode wave propagation by providing insight to the nature of mode interactions due to structural perturbation. Nevertheless, to ...
... (MRSEC) program of the NSF with use of their Shared Experimental Facilities. Modal decomposition in multimode optical waveguides plays an important role in the study of multimode wave propagation by providing insight to the nature of mode interactions due to structural perturbation. Nevertheless, to ...
GPS General Particle Source
... For polished interfaces, no ‘surface’ is needed if the index of refraction of the two media is defined The boundary process implementation is rigid about what it expects the G4Navigator does upon reflection on a boundary G4BoundaryProcess with ‘surfaces’ is only possible for volumes that have been p ...
... For polished interfaces, no ‘surface’ is needed if the index of refraction of the two media is defined The boundary process implementation is rigid about what it expects the G4Navigator does upon reflection on a boundary G4BoundaryProcess with ‘surfaces’ is only possible for volumes that have been p ...
Nomarski differential interference-contrast microscopy
... characterlstlc, that of splitting and recombin ing the beam. In the interference micro scope of the MicheJson type a beam-split ting prism is used . (For further details, see 11,13,16,17,28,35,36,37,40 and 41). In the lamin-Lebedeff and Nomarski double beam interference microscopes, on the other ...
... characterlstlc, that of splitting and recombin ing the beam. In the interference micro scope of the MicheJson type a beam-split ting prism is used . (For further details, see 11,13,16,17,28,35,36,37,40 and 41). In the lamin-Lebedeff and Nomarski double beam interference microscopes, on the other ...
The Science Case for SPICA Far
... sensitivity to measure widespread polarized emission from normal spiral galaxies, and only a far-infrared telescope as large as SPICA has the angular resolution required to resolve individual Giant Molecular Clouds (GMCs) in the most nearby systems at their ≈ 100 m spectral peak. A number of auth ...
... sensitivity to measure widespread polarized emission from normal spiral galaxies, and only a far-infrared telescope as large as SPICA has the angular resolution required to resolve individual Giant Molecular Clouds (GMCs) in the most nearby systems at their ≈ 100 m spectral peak. A number of auth ...
24.1 Physics 6C Geometrical Optics
... Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB ...
... Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB ...
MEMS for micro optics: from fiber optic communication to display
... microns by 400 microns each. The supporting hinges were designed to be short (100 microns long) and thin (1.7 microns wide) with the 30-micron-thick SOI layer to attain mechanical robustness against external vibration as well as low-voltage operation capability. 2.3 MEMS for Optical Computing Differ ...
... microns by 400 microns each. The supporting hinges were designed to be short (100 microns long) and thin (1.7 microns wide) with the 30-micron-thick SOI layer to attain mechanical robustness against external vibration as well as low-voltage operation capability. 2.3 MEMS for Optical Computing Differ ...
Nonlinear interfaces: intrinsically nonparaxial regimes and effects
... beam propagation method (NBPM) [36], which combines both finite difference and spectral methods. Backscattered waves are filtered out, thus avoiding an evanescent backward field, that can appear to grow in the forward direction and hence mask the contribution of the forward propagating field. This s ...
... beam propagation method (NBPM) [36], which combines both finite difference and spectral methods. Backscattered waves are filtered out, thus avoiding an evanescent backward field, that can appear to grow in the forward direction and hence mask the contribution of the forward propagating field. This s ...
Total Internal Reflection Fluorescence
... Figure 12.29.1 (A) Schematic of through-the-objective TIRF illuminator. Lasers are combined with longpass mirror(s) (LP) and then the beam diameter is increased with a telescope beam expander (BE). The periscope mirror system (PM) facilitates alignment by allowing translation of the beam on the TIR ...
... Figure 12.29.1 (A) Schematic of through-the-objective TIRF illuminator. Lasers are combined with longpass mirror(s) (LP) and then the beam diameter is increased with a telescope beam expander (BE). The periscope mirror system (PM) facilitates alignment by allowing translation of the beam on the TIR ...
Fiber Waveguide
... by a cladding whose refractive index is lower than that of the core. Because of an abrupt index change at the core–cladding interface, such fibers are called step-index fibers. In a different type of fiber, known as graded-index fiber, the refractive index decreases gradually inside the core. Consid ...
... by a cladding whose refractive index is lower than that of the core. Because of an abrupt index change at the core–cladding interface, such fibers are called step-index fibers. In a different type of fiber, known as graded-index fiber, the refractive index decreases gradually inside the core. Consid ...
Structure of Optical Vortices
... to bright rings, rather than to discrete intensity maxima. They also carry orbital angular momentum [1, 2], which they can transfer to illuminated objects [3]. When brought to a sufficiently strong focus, helical modes of light form toroidal optical traps known as optical vortices [4–6]. Their abili ...
... to bright rings, rather than to discrete intensity maxima. They also carry orbital angular momentum [1, 2], which they can transfer to illuminated objects [3]. When brought to a sufficiently strong focus, helical modes of light form toroidal optical traps known as optical vortices [4–6]. Their abili ...
Guided-mode triggered switching between TE orders of a metal
... versus the depth, then oscillates periodically with a decrease of the -1st order efficiency maximum due to increasing metal losses. The angular range of maximum -1st order around the Littrow angle θ L = sin−1 (λ/(2Λ)) (λ is the wavelength in vacuum, Λ the grating period) is usually very broad and is ...
... versus the depth, then oscillates periodically with a decrease of the -1st order efficiency maximum due to increasing metal losses. The angular range of maximum -1st order around the Littrow angle θ L = sin−1 (λ/(2Λ)) (λ is the wavelength in vacuum, Λ the grating period) is usually very broad and is ...
Wavefront retrieval of amplified femtosecond
... In the case of ultra-short pulses, the accurate study of the spectral characteristics of the SH beam requires to solve the wave equations governing the process [17–19]. However, although Eq. (1) was obtained for monochromatic plane waves, it still can be used in a first order approximation to estima ...
... In the case of ultra-short pulses, the accurate study of the spectral characteristics of the SH beam requires to solve the wave equations governing the process [17–19]. However, although Eq. (1) was obtained for monochromatic plane waves, it still can be used in a first order approximation to estima ...
Transversal ultrasonic probe
... antisymmetric A0 Lamb waves are propagated in the bulk of the plate. Elasto-optic disturbance analysis is carried out for each mode and comparison between both modes is made to best characterize the contact. Two and three wave optical interference analysis is used to explain the presence of fringes ...
... antisymmetric A0 Lamb waves are propagated in the bulk of the plate. Elasto-optic disturbance analysis is carried out for each mode and comparison between both modes is made to best characterize the contact. Two and three wave optical interference analysis is used to explain the presence of fringes ...
UNIT-4 OCN
... • It is assumed in that the light is incident on the fiber end face from air with a refractive index (n0) of unity. • numerical aperture thus defined represents only the local NA of the fiber on its core axis (the numerical aperture for light incident at the fiber core axis). • The graded profile cr ...
... • It is assumed in that the light is incident on the fiber end face from air with a refractive index (n0) of unity. • numerical aperture thus defined represents only the local NA of the fiber on its core axis (the numerical aperture for light incident at the fiber core axis). • The graded profile cr ...
- City Research Online
... It has been mentioned that the modal properties of the quasi-TM and TM modes were almost identical as the original straight PCF has a 6-fold rotational symmetry, before the bending is considered. In Fig.1, it was also noted that bending loss curve for = 5µm, showed several local perturbations. To s ...
... It has been mentioned that the modal properties of the quasi-TM and TM modes were almost identical as the original straight PCF has a 6-fold rotational symmetry, before the bending is considered. In Fig.1, it was also noted that bending loss curve for = 5µm, showed several local perturbations. To s ...
Superluminal and Slow Light Propagation in a Room
... ruby (20). Although our absorption (⬃1 cm⫺1) was higher than the absorption in the EIT experiments, it was several orders of magnitude lower than that in the earlier resonant systems (16). We report an observation of both ultraslow (vg ⬍⬍ c) and superluminal (vg ⬍ 0) light propagation at room temper ...
... ruby (20). Although our absorption (⬃1 cm⫺1) was higher than the absorption in the EIT experiments, it was several orders of magnitude lower than that in the earlier resonant systems (16). We report an observation of both ultraslow (vg ⬍⬍ c) and superluminal (vg ⬍ 0) light propagation at room temper ...
M. Tech in Optoelectronics and Laser Technology
... Approved by joint Board of Studies in Electronics & Physics on 27th April 2012 ...
... Approved by joint Board of Studies in Electronics & Physics on 27th April 2012 ...
Periodically Poled Lithium Niobate (PPLN) - Tutorial
... PPLN is an engineered, quasi-phase-matched material. The term engineered refers to the fact that the orientation of the Lithium Niobate crystal is periodically inverted (poled). The inverted portions of the crystal yield generated photons that are 180° out of phase with the generated photon that wou ...
... PPLN is an engineered, quasi-phase-matched material. The term engineered refers to the fact that the orientation of the Lithium Niobate crystal is periodically inverted (poled). The inverted portions of the crystal yield generated photons that are 180° out of phase with the generated photon that wou ...
Birefringence
Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with asymmetric crystal structures are often birefringent, as are plastics under mechanical stress.Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split by polarization into two rays taking slightly different paths. This effect was first described by the Danish scientist Rasmus Bartholin in 1669, who observed it in calcite, a crystal having one of the strongest birefringences. However it was not until the 19th century that Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding light as a wave with field components in transverse polarizations (perpendicular to the direction of the wave vector).