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... right]) are linearly stable as long as −∂ P/∂ µ > 0. Note that the criterion is “inverted” for our choice of µ . The fundamental gap solitons of repulsive BEC [Fig. 2 (left, a)] are also linearly stable. The linear stability analysis shows that gap solitons of both attractive and repulsive BEC are a ...
... right]) are linearly stable as long as −∂ P/∂ µ > 0. Note that the criterion is “inverted” for our choice of µ . The fundamental gap solitons of repulsive BEC [Fig. 2 (left, a)] are also linearly stable. The linear stability analysis shows that gap solitons of both attractive and repulsive BEC are a ...
IV. Single photon detection
... order to reduce the photon flux. This experimental set-up allows us to illuminate the junction with very few photons at each photodiode pulse by dilution of the optical fiber output beam. In addition, classical digital filtering methods are used to compute the photon counting data in order to minimi ...
... order to reduce the photon flux. This experimental set-up allows us to illuminate the junction with very few photons at each photodiode pulse by dilution of the optical fiber output beam. In addition, classical digital filtering methods are used to compute the photon counting data in order to minimi ...
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... Again, at high intensities the Brillouin effect becomes a stimulated process and the Brillouin wave may become much more intense than the original beam. Almost the entire beam may be reflected towards the laser source. ...
... Again, at high intensities the Brillouin effect becomes a stimulated process and the Brillouin wave may become much more intense than the original beam. Almost the entire beam may be reflected towards the laser source. ...
Beam steering with spatial light modulators: Quantisation effects
... full area of the SLM is not being used since the shape of the resulting spot became too deteriorated. We only selected central pixels for our experiments; the rest were set to a grating that deflects the light to positions outside the measurement area. Also, in order to avoid the effect that drift ( ...
... full area of the SLM is not being used since the shape of the resulting spot became too deteriorated. We only selected central pixels for our experiments; the rest were set to a grating that deflects the light to positions outside the measurement area. Also, in order to avoid the effect that drift ( ...
X = k R( ) P( )( ) d (1)
... 5.1. Biological material: Butterflies A. Monteiro is already in possession of specimens for each of 54 species of Bicyclus butterflies and will share wing samples with M. Srinivasarao. A small travel budget is included to allow additional specimens to be collected for the destructive SEM and TEM wor ...
... 5.1. Biological material: Butterflies A. Monteiro is already in possession of specimens for each of 54 species of Bicyclus butterflies and will share wing samples with M. Srinivasarao. A small travel budget is included to allow additional specimens to be collected for the destructive SEM and TEM wor ...
Raman tailored photonic-crystal-fiber for telecom band photon
... future quantum communication networks. Indeed, glass fibers are widely investigated for various nonlinear applications [4]. They can exhibit very low absorption, strong confinement over long distance and high nonlinearities according to the chosen glass. Moreover, the various design parameters in mi ...
... future quantum communication networks. Indeed, glass fibers are widely investigated for various nonlinear applications [4]. They can exhibit very low absorption, strong confinement over long distance and high nonlinearities according to the chosen glass. Moreover, the various design parameters in mi ...
Spectral phase conjugation via temporal imaging
... have been shown to be effective in compensating for the effects of group-velocity dispersion (GVD) and Kerr nonlinearity in optical fibers. Although experimental demonstrations of TPC [5–15] are more prevalent than SPC, comparison of the two schemes shows that SPC can provide more extensive dispersi ...
... have been shown to be effective in compensating for the effects of group-velocity dispersion (GVD) and Kerr nonlinearity in optical fibers. Although experimental demonstrations of TPC [5–15] are more prevalent than SPC, comparison of the two schemes shows that SPC can provide more extensive dispersi ...
Fabry-Perot Interferometer
... The finesse as defined in Eq. (5) is valid for a constant cavity spacing d across its lateral dimensions. On-axis beams would thus receive the same optical path length as parallel off-axis rays when propagating through the resonator. In contrast, easily aligned confocal arrangements as shown in Fig. ...
... The finesse as defined in Eq. (5) is valid for a constant cavity spacing d across its lateral dimensions. On-axis beams would thus receive the same optical path length as parallel off-axis rays when propagating through the resonator. In contrast, easily aligned confocal arrangements as shown in Fig. ...
DFB Quantum Cascade Laser Arrays The Harvard community has
... [11]. We fabricated several arrays of 32 lasers on a single chip, as shown in Fig. 1. Each individual laser in the array is designed to emit at a different frequency with the entire array covering a range of 90 cm . The spacing of the emission frequencies is sufficiently small such that for any freq ...
... [11]. We fabricated several arrays of 32 lasers on a single chip, as shown in Fig. 1. Each individual laser in the array is designed to emit at a different frequency with the entire array covering a range of 90 cm . The spacing of the emission frequencies is sufficiently small such that for any freq ...
Towards noninvasive glucose sensing using
... to blood glucose levels, and outlines the remaining outstanding challenges of this promising approach. With the exception of transparent ocular tissues, however, the human body is highly absorbing and scattering in the UV-IR range, and the validity of Eq. (17.1) is questionable. Specifically, (i) li ...
... to blood glucose levels, and outlines the remaining outstanding challenges of this promising approach. With the exception of transparent ocular tissues, however, the human body is highly absorbing and scattering in the UV-IR range, and the validity of Eq. (17.1) is questionable. Specifically, (i) li ...
Khoros - The University of New Mexico
... usually made of some conductor such as copper. • It confines and guides very high frequency radio waves between two locations. • Waveguides are used for signals in the range of gigahertz (GHz) frequencies where twisted pair or even coaxial cables are not effective. ...
... usually made of some conductor such as copper. • It confines and guides very high frequency radio waves between two locations. • Waveguides are used for signals in the range of gigahertz (GHz) frequencies where twisted pair or even coaxial cables are not effective. ...
Markov chain model in maximum-likelihood sequence detection for
... long, log-amplitude fluctuations can become significant. In this section, we will derive the statistical properties of the log-amplitude fluctuations, which we refer to as “intensity fading” or simply “fading.” The marginal distribution of fading is derived in Section I, while the joint spatial and ...
... long, log-amplitude fluctuations can become significant. In this section, we will derive the statistical properties of the log-amplitude fluctuations, which we refer to as “intensity fading” or simply “fading.” The marginal distribution of fading is derived in Section I, while the joint spatial and ...
EXPERIMENT 06 Helium Neon Laser
... considerably higher than the 632 nm line which is reached at what is now commonly known as the red line, which was made to oscillate only one year later by White and Ridgen. The similarity between the manufacturing techniques of HeNe lasers and electron valves helped in the mass production and distr ...
... considerably higher than the 632 nm line which is reached at what is now commonly known as the red line, which was made to oscillate only one year later by White and Ridgen. The similarity between the manufacturing techniques of HeNe lasers and electron valves helped in the mass production and distr ...
www2
... OEC. Under ideal conditions, when there are no photochemical/photophysical losses and the arrivals of the photons correspond to the reaction rates depicted in the cycle, the absorption of 4 photons can do this job. Therefore, the OEC works as a coincidence photon counter with threshold value of nth ...
... OEC. Under ideal conditions, when there are no photochemical/photophysical losses and the arrivals of the photons correspond to the reaction rates depicted in the cycle, the absorption of 4 photons can do this job. Therefore, the OEC works as a coincidence photon counter with threshold value of nth ...
Absorption cross section of black holes with global
... The key issues around which the physics of black hole scattering centers, are related to phenomena such as glory, orbiting, rainbow and super-radiant scattering. Scattering by black holes is of foundational interest in both black-hole physics and scattering theory. The presence of black holes can be ...
... The key issues around which the physics of black hole scattering centers, are related to phenomena such as glory, orbiting, rainbow and super-radiant scattering. Scattering by black holes is of foundational interest in both black-hole physics and scattering theory. The presence of black holes can be ...
Acoustic spectra characteristics of atmospheric pressure plasma
... penetrating optical wave as a local oscillating power. The intensity of diffracted waves of higher orders is much smaller than that of the first order wave and can be neglected. The spatial intensity (Iac) of the resultant optical field at the back focal plane is given by the equation (1) [34,11]. W ...
... penetrating optical wave as a local oscillating power. The intensity of diffracted waves of higher orders is much smaller than that of the first order wave and can be neglected. The spatial intensity (Iac) of the resultant optical field at the back focal plane is given by the equation (1) [34,11]. W ...
b1.2. generation and propagation of higher order gaussian beams
... Generation of higher order modes are interesting because of the phase singularity and the characteristic intensity distribution. In particular, the dark region is very useful to manipulate particles in single beam optical traps [1]. Large number of vortices available in higher order modes could be a ...
... Generation of higher order modes are interesting because of the phase singularity and the characteristic intensity distribution. In particular, the dark region is very useful to manipulate particles in single beam optical traps [1]. Large number of vortices available in higher order modes could be a ...
Vacuum Chamber Design for a Magneto
... To make sure that this results in a reduction in speed, we need some way to make sure that the atom’s momentum is likely to be in a direction opposite that of the photons it absorbs. Optical Doppler shifting causes photons’ frequency to appear different depending on the atom’s motion relative to th ...
... To make sure that this results in a reduction in speed, we need some way to make sure that the atom’s momentum is likely to be in a direction opposite that of the photons it absorbs. Optical Doppler shifting causes photons’ frequency to appear different depending on the atom’s motion relative to th ...
Mode shape and dispersion relation of bending waves in thin silicon
... FIG. 2. (Color) (a)-(d) Examples of measured eigenmodes (only the real part is shown) of a membrane with size 714 /km x 691 /km x 340 nm. The applied pressure difference is 50 mbar and the excitation frequency is varied from I to 2 MHz. Red and blue denote opposite sign of the phase with respect to ...
... FIG. 2. (Color) (a)-(d) Examples of measured eigenmodes (only the real part is shown) of a membrane with size 714 /km x 691 /km x 340 nm. The applied pressure difference is 50 mbar and the excitation frequency is varied from I to 2 MHz. Red and blue denote opposite sign of the phase with respect to ...
OW1: Experiment on Planar Waveguides
... 3b. The laser orientation may be adjusted such that the beam propagates along the optical axis. The polarizer and lens should be mounted with their centers on the optical axis, and the laser beam focused onto the rear face of the coupling prism close to the right angle. The focal length of the lens ...
... 3b. The laser orientation may be adjusted such that the beam propagates along the optical axis. The polarizer and lens should be mounted with their centers on the optical axis, and the laser beam focused onto the rear face of the coupling prism close to the right angle. The focal length of the lens ...
OW1: Experiment on Planar Waveguides
... 3b. The laser orientation may be adjusted such that the beam propagates along the optical axis. The polarizer and lens should be mounted with their centers on the optical axis, and the laser beam focused onto the rear face of the coupling prism close to the right angle. The focal length of the lens ...
... 3b. The laser orientation may be adjusted such that the beam propagates along the optical axis. The polarizer and lens should be mounted with their centers on the optical axis, and the laser beam focused onto the rear face of the coupling prism close to the right angle. The focal length of the lens ...
Introduction to Aberrations OPTI 518 Jose Sasian
... student in all academic work. The guiding principle of academic integrity is that a student’s submitted work must be the student’s own.” Unless otherwise noted by the instructor, work for all assignments in this course must be conducted independently by each student. CO-AUTHORED WORK OF ANY KIND IS ...
... student in all academic work. The guiding principle of academic integrity is that a student’s submitted work must be the student’s own.” Unless otherwise noted by the instructor, work for all assignments in this course must be conducted independently by each student. CO-AUTHORED WORK OF ANY KIND IS ...
How much mathematics should optics students know
... holographic procedure of wavefront reconstruction. The diffraction from apertures illuminated by partially coherent light can also be easily derived. ...
... holographic procedure of wavefront reconstruction. The diffraction from apertures illuminated by partially coherent light can also be easily derived. ...
3D optical data storage
3D optical data storage is the term given to any form of optical data storage in which information can be recorded and/or read with three-dimensional resolution (as opposed to the two-dimensional resolution afforded, for example, by CD).This innovation has the potential to provide petabyte-level mass storage on DVD-sized discs (120mm). Data recording and readback are achieved by focusing lasers within the medium. However, because of the volumetric nature of the data structure, the laser light must travel through other data points before it reaches the point where reading or recording is desired. Therefore, some kind of nonlinearity is required to ensure that these other data points do not interfere with the addressing of the desired point.No commercial product based on 3D optical data storage has yet arrived on the mass market, although several companies are actively developing the technology and claim that it may become available ""soon"".