E, EE - OSA Publishing
... studying biological processes on a microscopic scale. Current laboratory x-ray lasers function as single-pass amplifiers without the benefit of feedback mirrors and thus behave as amplifiers of incoherent spontaneous emission radiation. Thus spatial coherence of the emitted light comes from aperturi ...
... studying biological processes on a microscopic scale. Current laboratory x-ray lasers function as single-pass amplifiers without the benefit of feedback mirrors and thus behave as amplifiers of incoherent spontaneous emission radiation. Thus spatial coherence of the emitted light comes from aperturi ...
I have already shown the rate of change of the kinetic energy with
... This says the free electrons in a metal, those producing electromagnetic radiation, move at the speed of sound. For an electron in space vp may be a variable, but not for an electron roaming relatively free inside a metal. For example, electrons inside an antenna are suggested to be roaming randomly ...
... This says the free electrons in a metal, those producing electromagnetic radiation, move at the speed of sound. For an electron in space vp may be a variable, but not for an electron roaming relatively free inside a metal. For example, electrons inside an antenna are suggested to be roaming randomly ...
Lasers and lenses - University of Toronto
... a laser far detuned from the transition frequency of an atom will lead to a trap with a lower heating rate. The cost of using a farther detuned laser (longer wavelength) is that it will require greater power to create a sufficiently deep trap. Lasers from six different companies were compared in or ...
... a laser far detuned from the transition frequency of an atom will lead to a trap with a lower heating rate. The cost of using a farther detuned laser (longer wavelength) is that it will require greater power to create a sufficiently deep trap. Lasers from six different companies were compared in or ...
ULTRAFAST MEASUREMENT OF THE OPTICAL
... The experimental arrangement for USI is shown schematically in Fig. 1. The thin film targets were mounted on a computer-controlled x-y translation stage. The target was rastered about 4 laser diameters between experiments so that each laserdriven shock would propagate into undisturbed material. Expe ...
... The experimental arrangement for USI is shown schematically in Fig. 1. The thin film targets were mounted on a computer-controlled x-y translation stage. The target was rastered about 4 laser diameters between experiments so that each laserdriven shock would propagate into undisturbed material. Expe ...
- Free Documents
... the relative difference between two power levels dB logPout / Pin log Pout .Optical Parameters Attenuation refers to any reduction in the strength of a signal Attenuation occurs with any type of signal. log Pin dBm a measure of absolute power dBm log Pmw . Optical Concepts . ...
... the relative difference between two power levels dB logPout / Pin log Pout .Optical Parameters Attenuation refers to any reduction in the strength of a signal Attenuation occurs with any type of signal. log Pin dBm a measure of absolute power dBm log Pmw . Optical Concepts . ...
Full text
... met with spatial light modulators [3], galvanometric scanners, acousto-optic modulators, or deformable mirrors [7]. Spatial light modulators are generally limited to refresh rates of less than 100 Hz, while galvanometers and acousto-optic modulators are primarily capable of deflecting and not shapin ...
... met with spatial light modulators [3], galvanometric scanners, acousto-optic modulators, or deformable mirrors [7]. Spatial light modulators are generally limited to refresh rates of less than 100 Hz, while galvanometers and acousto-optic modulators are primarily capable of deflecting and not shapin ...
4.6.2 Reflection, Refraction, Diffraction
... coupling factor of the defect microcavity also make it interesting as a low-noise low-threshold light source. ...
... coupling factor of the defect microcavity also make it interesting as a low-noise low-threshold light source. ...
View/Open - Dora.dmu.ac.uk
... Holography is a branch of optics and it is mostly unknown to a lay man as it contains complicated scientific terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. ...
... Holography is a branch of optics and it is mostly unknown to a lay man as it contains complicated scientific terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. ...
introduction - Stanford Synchrotron Radiation Lightsource
... important. Hall A is also necessary because a number of the optical elements and instruments developed (at least conceptually) for the LCLS depend on close proximity to the LCLS undulator for optimal operation or parameter values. These elements include (and are discussed later): a) planar take-off ...
... important. Hall A is also necessary because a number of the optical elements and instruments developed (at least conceptually) for the LCLS depend on close proximity to the LCLS undulator for optimal operation or parameter values. These elements include (and are discussed later): a) planar take-off ...
High accuracy ranging with Yb -doped fiber-ring frequency
... measuring (via superposition of the test beam with a reference beam) the phase / = 2xh/c induced by propagation of the test beam through an incremental distance h to a reflecting (mirror) surface. Interferometric measurements provide only values of relative distances: they give the distance that the ...
... measuring (via superposition of the test beam with a reference beam) the phase / = 2xh/c induced by propagation of the test beam through an incremental distance h to a reflecting (mirror) surface. Interferometric measurements provide only values of relative distances: they give the distance that the ...
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.