Feature Selection/Extraction for Classification Problems
... point which leave the lattice invariant ⟹ around a given point ...
... point which leave the lattice invariant ⟹ around a given point ...
- Phasics
... within the plasma and not an average response to an interdependent ensemble of speckles that have various intensities. Thus it allows the theoretical models to be validated and the simulation codes to be assessed on a level of reduced complexity. Also, reducing the needed size of the simulation boxe ...
... within the plasma and not an average response to an interdependent ensemble of speckles that have various intensities. Thus it allows the theoretical models to be validated and the simulation codes to be assessed on a level of reduced complexity. Also, reducing the needed size of the simulation boxe ...
Other photon-lithographies
... • Two-photon excitation arises from the simultaneous (10-18 seconds) absorption of two photons in a single quantitized event. • Fluorescence emission (at l3) varies with the square of the excitation intensity. • The photon density must be approximately one million times required to generate the same ...
... • Two-photon excitation arises from the simultaneous (10-18 seconds) absorption of two photons in a single quantitized event. • Fluorescence emission (at l3) varies with the square of the excitation intensity. • The photon density must be approximately one million times required to generate the same ...
Spectral Characteristics of Semiconductor Lasers with Optical
... level is the same as (b), but the phase in the external cavity is shifted by rr rads to give multimode operation. In (a)-(d) the dashed curve corresponds to no feedback (r= O). ...
... level is the same as (b), but the phase in the external cavity is shifted by rr rads to give multimode operation. In (a)-(d) the dashed curve corresponds to no feedback (r= O). ...
Light sources - University of Washington
... were thought to orbit the nucleus like planets orbit the sun. Unfortunately, this is the atomic model still taught in many secondary schools. In the mid-20th. century, it was discovered that the structure of the electronic shells was somewhat more complex consisting of: - up to at least seven capita ...
... were thought to orbit the nucleus like planets orbit the sun. Unfortunately, this is the atomic model still taught in many secondary schools. In the mid-20th. century, it was discovered that the structure of the electronic shells was somewhat more complex consisting of: - up to at least seven capita ...
PubTeX output 2005.03.30:1333
... In the time domain, finite-difference time-domain (FDTD) algorithms [2], [4] and [6] are widely used and are the most commonly method used for PC cavities analysis. Finer discretization is required to avoid the staircase problem when curved geometries have to be modeled; additionally, short time ste ...
... In the time domain, finite-difference time-domain (FDTD) algorithms [2], [4] and [6] are widely used and are the most commonly method used for PC cavities analysis. Finer discretization is required to avoid the staircase problem when curved geometries have to be modeled; additionally, short time ste ...
Tapered Fiber Fabrication
... as supercontinuum generation has been observed [Birks92]. Since the light still maintains high levels of spatial coherence, supercontiuum generation has important applications to meteorology and spectroscopy [Birks92]. Taper Shape Predictions As “The Shape of Fiber Tapers” by Birks and Li was used a ...
... as supercontinuum generation has been observed [Birks92]. Since the light still maintains high levels of spatial coherence, supercontiuum generation has important applications to meteorology and spectroscopy [Birks92]. Taper Shape Predictions As “The Shape of Fiber Tapers” by Birks and Li was used a ...
Nanosecond laser-induced breakdown in pure and - AS
... flashlamp-pumped, Q-switched, Nd:YAG laser modified to produce a nearly Gaussian spatial beam. The laser was injection seeded to ensure single-longitudinal-mode (smooth pulse) operation. We varied the laser pulse energy delivered to the test sample using a variable attenuator consisting of a half-wa ...
... flashlamp-pumped, Q-switched, Nd:YAG laser modified to produce a nearly Gaussian spatial beam. The laser was injection seeded to ensure single-longitudinal-mode (smooth pulse) operation. We varied the laser pulse energy delivered to the test sample using a variable attenuator consisting of a half-wa ...
Semiconductor Disk Lasers: Recent Advances in Generation of
... in that time window by an incoming pulse, a portion of that energy will be lost to spontaneous emission between the consequent pulses. This feature sets a practical upper limit for the cavity length in mode-locked laser with continuous wave pumping. To scale up the power of an SDL, it is possible to ...
... in that time window by an incoming pulse, a portion of that energy will be lost to spontaneous emission between the consequent pulses. This feature sets a practical upper limit for the cavity length in mode-locked laser with continuous wave pumping. To scale up the power of an SDL, it is possible to ...
Siggraph Asia Technical Brief
... optics system, since this is hard test later. A good set of precision screw drivers makes this a lot easier. The next component is a laser. As shown in figure 1b the user looks into the device to see the hologram, therefore, a low power laser must be used to avoid eye damage. On the other hand, we w ...
... optics system, since this is hard test later. A good set of precision screw drivers makes this a lot easier. The next component is a laser. As shown in figure 1b the user looks into the device to see the hologram, therefore, a low power laser must be used to avoid eye damage. On the other hand, we w ...
Photonic laser thruster
A photonic laser thruster is an amplified laser thruster that generates thrust directly from the laser photon momentum, rather than laser-heating propellant. The concept of single-bounce laser-pushed lightsails that utilize the photon momentum was first developed in the 1960s, however, its conversion of laser power to thrust is highly inefficient, thus has been considered impractical. Over 50 years, there had been numerous theoretical and experimental efforts to increase the conversion efficiency by recycling photons, bouncing them repetitively between two reflective mirrors in an empty optical cavity, without success. In December 2006, Young Bae successfully solved this problem and demonstrated the conversion efficiency enhancement by a factor of 100 and a photon thrust of 35 micronewtons by putting the laser energizing media between the two mirrors as in typical lasers, and the photonic laser thruster was born. In August 2015, the photonic laser thruster was demonstrated to increase the conversion efficiency enhancement by a factor over 1,000 and to achieve a photon thrust of 3.5 millinewtons at Y.K. Bae Corporation. In addition, Propelling, slowing and stopping of a small satellite, 1U CubeSat, in simulated zero-gravity were demonstrated. The photonic laser thruster was initially developed for use in nanometer precision spacecraft formation, for forming ultralarge space telescopes and radars. The photonic laser thruster is currently developed for high-precision and high-speed maneuver of small spacecraft, such as formation flying, orbit adjustments, drag compensation, and rendezvous and docking. The photonic laser thruster can be used for beaming thrust from a conventional heavy resource vehicle to a more expensive & lightweight mission vehicle, similar to tankers in aerial refueling.The practical usage of the photonic laser thruster for main space propulsion would require extremely high laser powers and overcoming technological challenges in achieving the laser power and fabricating the required optics. Photonic laser thrusters have a very high specific impulse, and can permit spacecraft reach much higher speeds than with conventional rockets, which are limited by the Tsiolkovsky rocket equation. If the photonic laser thruster is scalable for the use in such main space propulsion, multiple photonic laser thrusters can be used to construct a 'photonic railway' that has been proposed as a potential permanent transport infrastructure for interplanetary or interstellar commutes, allowing the transport craft themselves to carry very little fuel.