Polarised Light in Science and Nature
... We humans cannot see when light is polarised and this leads us to unfortunate misapprehensions about it. Even scientists who should know better, often assume that polarised light is an obscure topic of specialised interest in only a few rather isolated areas; in fact it is a universal feature of our ...
... We humans cannot see when light is polarised and this leads us to unfortunate misapprehensions about it. Even scientists who should know better, often assume that polarised light is an obscure topic of specialised interest in only a few rather isolated areas; in fact it is a universal feature of our ...
Fiberoptic Communication Systems
... back to Figure and visualize that each of the replicas of the pulses now correspond to the individual wavelengths that constitute the spectrum of the source, the output pulse will certainly be broadened. The pulse broadening in single mode fibers will be much smaller than the corresponding value in ...
... back to Figure and visualize that each of the replicas of the pulses now correspond to the individual wavelengths that constitute the spectrum of the source, the output pulse will certainly be broadened. The pulse broadening in single mode fibers will be much smaller than the corresponding value in ...
Manipulating Light with a Magnetic Field - lpmmc
... with theory also gives us confidence in our experimental setup. A comment on these conclusions was published by ’t Hooft, Nienhuis, and Paaschens [20]. They argued that exactly in Voigt geometry, the eigenmodes are both linearly polarized, none of which suffer from magnetodeflection. They explained our ...
... with theory also gives us confidence in our experimental setup. A comment on these conclusions was published by ’t Hooft, Nienhuis, and Paaschens [20]. They argued that exactly in Voigt geometry, the eigenmodes are both linearly polarized, none of which suffer from magnetodeflection. They explained our ...
Full-text PDF - Research School of Physics and Engineering
... Also, from this perspective we understand that there is no simple mapping between temporal and spatial optical solitons. Spatial solitons are a much richer and more complicated phenomenon, and this has already been demonstrated by a number of elegant experiments in this field. In particular, it has ...
... Also, from this perspective we understand that there is no simple mapping between temporal and spatial optical solitons. Spatial solitons are a much richer and more complicated phenomenon, and this has already been demonstrated by a number of elegant experiments in this field. In particular, it has ...
Silicon-on-Insulator Grating Duplexer for Fiber-to-the
... grating directionality (being the fraction of optical power diffracted upwards by the grating to the total diffracted power when excited from the SOI waveguide) for the 1310nm wavelength channel and the 1490nm wavelength channel. This led to an optimal grating overlay thickness of 140nm and a gratin ...
... grating directionality (being the fraction of optical power diffracted upwards by the grating to the total diffracted power when excited from the SOI waveguide) for the 1310nm wavelength channel and the 1490nm wavelength channel. This led to an optimal grating overlay thickness of 140nm and a gratin ...
Silica-Based Highly Nonlinear Fibers and Their Applications
... FWM is used for various applications including wavelength conversion. The FWM conversion efficiency can be maximized when the phase matching condition is satisfied among the probe, pump, and idler lights, because the idler light is always added with the same phase. If the pump wavelength is identica ...
... FWM is used for various applications including wavelength conversion. The FWM conversion efficiency can be maximized when the phase matching condition is satisfied among the probe, pump, and idler lights, because the idler light is always added with the same phase. If the pump wavelength is identica ...
Propagation and focusing of optical fields
... field and that it is zero on the optical axis. Its magnitude depends on the tightness of the focus. Fig. 3.3 and Fig. 3.4 show the calculated total and transverse electric field distribution for the Gaussian beam and the Hermite-Gaussian (10) beam, respectively. While the longitudinal electric field ...
... field and that it is zero on the optical axis. Its magnitude depends on the tightness of the focus. Fig. 3.3 and Fig. 3.4 show the calculated total and transverse electric field distribution for the Gaussian beam and the Hermite-Gaussian (10) beam, respectively. While the longitudinal electric field ...
Telescope Bernard Lyot/Narval The Observatory of Stellar Magnetism
... - Image motion / seeing / variability issues. - Requires active component. - Fast modulation and demodulation desirable but often not possible. ...
... - Image motion / seeing / variability issues. - Requires active component. - Fast modulation and demodulation desirable but often not possible. ...
5 Optical Fibers
... If the angle of the incident ray is greater than the critical angle, the ray is reflected back into the medium with refractive index n1. This basic idea can be used to propagate a light ray in a structure with n1 > n2, and Figure 5.3 illustrates this idea. The light ray incident at an angle greater ...
... If the angle of the incident ray is greater than the critical angle, the ray is reflected back into the medium with refractive index n1. This basic idea can be used to propagate a light ray in a structure with n1 > n2, and Figure 5.3 illustrates this idea. The light ray incident at an angle greater ...
SRON presentation
... Low-loss combination of two beams of different frequency and polarization into one beam of the same polarization Often used for LO and signal beam coupling Use of polarization rotation by roof top mirror: • Input beam reflected by grid ...
... Low-loss combination of two beams of different frequency and polarization into one beam of the same polarization Often used for LO and signal beam coupling Use of polarization rotation by roof top mirror: • Input beam reflected by grid ...
Gradient Index Optics at DARPA - Institute for Defense Analyses
... Defense Analyses (IDA) to assemble a summary of work on gradient index optics completed under funding from the Agency. The purpose was to archive the efforts, motivation, and accomplishments that the Agency supported and to provide a reference for any future programs that explore this new area of op ...
... Defense Analyses (IDA) to assemble a summary of work on gradient index optics completed under funding from the Agency. The purpose was to archive the efforts, motivation, and accomplishments that the Agency supported and to provide a reference for any future programs that explore this new area of op ...
Pulse Propagation in Optical Fibers
... propagation velocities of different spectral components is called the Group Velocity Dispersion (GVD). There are two main types of dispersion: the Intermodal Dispersion (between the various modes of propagation) and intramodal dispersion (under the same mode of propagation). Intermodal dispersion is ...
... propagation velocities of different spectral components is called the Group Velocity Dispersion (GVD). There are two main types of dispersion: the Intermodal Dispersion (between the various modes of propagation) and intramodal dispersion (under the same mode of propagation). Intermodal dispersion is ...
Introduction to Fiber Optic Sensing
... uses include oil and gas pipeline monitoring for security and leak detection, and linear heat detection systems. Rayleigh Rayleigh signals have more intensity than Raman signals and are more sensitive to strain than to temperature. This makes Rayleigh scattering systems most effective for measuring ...
... uses include oil and gas pipeline monitoring for security and leak detection, and linear heat detection systems. Rayleigh Rayleigh signals have more intensity than Raman signals and are more sensitive to strain than to temperature. This makes Rayleigh scattering systems most effective for measuring ...
Get PDF - OSA Publishing
... Photonic band-gap materials [1] – artificial periodic structures fabricated in a dielectric medium with a high refractive index contrast – offer new possibilities for the control and manipulation of coherent light waves. Diffraction management, localization, and controlled steering of light in perio ...
... Photonic band-gap materials [1] – artificial periodic structures fabricated in a dielectric medium with a high refractive index contrast – offer new possibilities for the control and manipulation of coherent light waves. Diffraction management, localization, and controlled steering of light in perio ...
Acousto-Optic Devices and Applications
... power. This is referred to as the weak interaction (or small signal) approximation which is valid when the peak efficiency is below 70 percent. As acoustic power increases, the diffraction efficiency saturates and approaches 100 percent. Thus in the Bragg regime, complete depletion of the incident l ...
... power. This is referred to as the weak interaction (or small signal) approximation which is valid when the peak efficiency is below 70 percent. As acoustic power increases, the diffraction efficiency saturates and approaches 100 percent. Thus in the Bragg regime, complete depletion of the incident l ...
Recent advances in transformation optics
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
Recent advances in transformation optics
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
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).