Rotating light with light: Generation of helical modes of light by spin
... of freedom, which are not communicating or interacting with each other. One could easily act on the spin variable alone of a laser beam by means of standard birefringent plates. The creation or manipulation of the orbital angular momentum of a laser beam was instead possible by means of special phas ...
... of freedom, which are not communicating or interacting with each other. One could easily act on the spin variable alone of a laser beam by means of standard birefringent plates. The creation or manipulation of the orbital angular momentum of a laser beam was instead possible by means of special phas ...
Optical design of reflectionless complex media by
... Recently, the technique of transformation optics has emerged as a means of designing complex media that can bring about unprecedented control of electromagnetic fields. A transformation optical structure is designed by first applying a form-invariant coordinate transform to Maxwell’s equations, in w ...
... Recently, the technique of transformation optics has emerged as a means of designing complex media that can bring about unprecedented control of electromagnetic fields. A transformation optical structure is designed by first applying a form-invariant coordinate transform to Maxwell’s equations, in w ...
Gauthier Abstracts - Department of Electronics
... The effect of adding a thin high index dielectric overlay layer onto a 3-layer slab waveguide demonstrates several interesting features that can be exploited in integrated optical device configurations. A simple modal analysis is employed to examine the behavior of guided light launched from a 3-lay ...
... The effect of adding a thin high index dielectric overlay layer onto a 3-layer slab waveguide demonstrates several interesting features that can be exploited in integrated optical device configurations. A simple modal analysis is employed to examine the behavior of guided light launched from a 3-lay ...
Storage and Control of Optical Photons Using Rydberg
... associated with the 60s blockade process. The microwave field thus introduces a second blockade scale [23,24] with a characteristic size R ¼ ðC3 =@ Þ1=3 , where C3 is the resonant dipole-dipole interaction coefficient and is the Rabi frequency of the microwave transition. By varying we can ...
... associated with the 60s blockade process. The microwave field thus introduces a second blockade scale [23,24] with a characteristic size R ¼ ðC3 =@ Þ1=3 , where C3 is the resonant dipole-dipole interaction coefficient and is the Rabi frequency of the microwave transition. By varying we can ...
The concept of modes in optics and photonics
... As shown above, the quality of light in terms of coherence, both in space and time, cannot be increased by passive optical elements. Although this fact can be deduced from geometrical optics for its spatial aspect, the concept of modes and number of photons per mode allows a more fundamental underst ...
... As shown above, the quality of light in terms of coherence, both in space and time, cannot be increased by passive optical elements. Although this fact can be deduced from geometrical optics for its spatial aspect, the concept of modes and number of photons per mode allows a more fundamental underst ...
Design of an integrated optical source of twin photons Ivan Avrutsky
... The phase matching for the nonlinear process of frequency-degenerated spontaneous parametric downconversion in tunneling-coupled channel waveguides is analyzed. The use of type II nonlinear interaction with individual photons in each pair appearing in different output channels allows for constructin ...
... The phase matching for the nonlinear process of frequency-degenerated spontaneous parametric downconversion in tunneling-coupled channel waveguides is analyzed. The use of type II nonlinear interaction with individual photons in each pair appearing in different output channels allows for constructin ...
Optical transmission technology
... built in the 60ties or 70ties and many of them are still in use. Since operators fear the cost of re-building the last mile connecting the customer, many access networks are still based on telephone wires or coax cable, which were installed something like 30 to 40 years ago. In many countries the fi ...
... built in the 60ties or 70ties and many of them are still in use. Since operators fear the cost of re-building the last mile connecting the customer, many access networks are still based on telephone wires or coax cable, which were installed something like 30 to 40 years ago. In many countries the fi ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.