Laser and Gaussian Beam Propagation and Transformation
... of laser emission obtained. For stable resonators neglecting a small loss of energy, the amplitude distribution is self-reproduced in every round trip of the laser through the resonator. Unstable resonators produce an amplitude distribution more complicated than in the stable case. Besides, the ener ...
... of laser emission obtained. For stable resonators neglecting a small loss of energy, the amplitude distribution is self-reproduced in every round trip of the laser through the resonator. Unstable resonators produce an amplitude distribution more complicated than in the stable case. Besides, the ener ...
Visualization of superluminal pulses inside a temporal transfer functions
... of both space and time, we decompose an input pulse with a given starting position and a temporal shape into a sum of the Ein fields, properly phased with respect to one another. The PWSTTFs are then used to find the corresponding Er, Ef, Eb and Eout. Summing the STTFs for each of these four fields ...
... of both space and time, we decompose an input pulse with a given starting position and a temporal shape into a sum of the Ein fields, properly phased with respect to one another. The PWSTTFs are then used to find the corresponding Er, Ef, Eb and Eout. Summing the STTFs for each of these four fields ...
Analysis of optical interferometric displacement detection in nanoelectromechanical systems
... interesting regimes of fundamental research.1,2 These nanoelectromechanical systems 共NEMS兲 have recently achieved fundamental resonance frequencies exceeding 1 GHz with quality 共Q兲 factors in the 103 艋 Q 艋 105 range.3 Even at this early stage of their development, it seems clear that NEMS will find ...
... interesting regimes of fundamental research.1,2 These nanoelectromechanical systems 共NEMS兲 have recently achieved fundamental resonance frequencies exceeding 1 GHz with quality 共Q兲 factors in the 103 艋 Q 艋 105 range.3 Even at this early stage of their development, it seems clear that NEMS will find ...
Liquid-crystal photonic applications
... is very similar as for achiral mesogens, but the asymmetry of the molecules causes a gradual rotation of the director, which induces a spontaneous and continuous twist around the normal of the preferred molecular directions [Fig. 2(b)]. The distance over which the director has rotated over an angle ...
... is very similar as for achiral mesogens, but the asymmetry of the molecules causes a gradual rotation of the director, which induces a spontaneous and continuous twist around the normal of the preferred molecular directions [Fig. 2(b)]. The distance over which the director has rotated over an angle ...
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... EIT-based nonlinear schemes can be driven by traveling wave beams as well as by a standing wave (SW). The large nonlinearity was obtained in an atomic system driven by two counter propagating coupling fields which form a SW if the two counter propagating coupling fields have the same frequency [11, ...
... EIT-based nonlinear schemes can be driven by traveling wave beams as well as by a standing wave (SW). The large nonlinearity was obtained in an atomic system driven by two counter propagating coupling fields which form a SW if the two counter propagating coupling fields have the same frequency [11, ...
Quantum imaging and information
... chapters 2 and 3. Experiments involving ghost imaging relying on spatial entanglement are described in chapters 4 and 5. In all of these chapters, relevant theoretical descriptions are given along with discussions of the results and their meaning. The research is experimental in nature and the light ...
... chapters 2 and 3. Experiments involving ghost imaging relying on spatial entanglement are described in chapters 4 and 5. In all of these chapters, relevant theoretical descriptions are given along with discussions of the results and their meaning. The research is experimental in nature and the light ...
Use of beam parameters in optical component testing
... Optical systems and components have become ubiquitous in modern society. Advanced laser technologies, optics, and electronics are often combined into devices such as compact disk recorders and fiber optic networks, which were unknown a generation ago. With the explosive growth of photonics industrie ...
... Optical systems and components have become ubiquitous in modern society. Advanced laser technologies, optics, and electronics are often combined into devices such as compact disk recorders and fiber optic networks, which were unknown a generation ago. With the explosive growth of photonics industrie ...
Holographic Fabrication of Designed Functional Defect Lines in
... including phase masks [10–14], prisms [15], and reflective optical elements [17,18], has significantly reduced the complexity of the optical setup for laser holographic lithography. Holographic lithography has also been applied to fabrication of PhC templates and desired defects simultaneously [19–2 ...
... including phase masks [10–14], prisms [15], and reflective optical elements [17,18], has significantly reduced the complexity of the optical setup for laser holographic lithography. Holographic lithography has also been applied to fabrication of PhC templates and desired defects simultaneously [19–2 ...
Laser cooling and trapping of atoms
... In section IV the first modern laser cooling experiments are described. Atoms in beams were slowed down from thermal velocity to a few m/s, and the dominant problem was the change in Doppler shift arising from such a large change in velocity. Some typical values of parameters are discussed and tabula ...
... In section IV the first modern laser cooling experiments are described. Atoms in beams were slowed down from thermal velocity to a few m/s, and the dominant problem was the change in Doppler shift arising from such a large change in velocity. Some typical values of parameters are discussed and tabula ...
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.