unable_MEMS.pdf
... take advantage of both the C-band (~1530-1565 nm) and the L-band (~1570-1610 nm) with 100 channels in each band. Long-distance, transparent transmission over distances greater than 3000 km requires tight specifications on laser parameters (linewidth, frequency stability and output power) and on filt ...
... take advantage of both the C-band (~1530-1565 nm) and the L-band (~1570-1610 nm) with 100 channels in each band. Long-distance, transparent transmission over distances greater than 3000 km requires tight specifications on laser parameters (linewidth, frequency stability and output power) and on filt ...
Single Photon Sources - University of Rochester
... extremely powerful quantum computers, the security of information transferred by quantum communication systems remains unthreatened. While these systems offer great promise, their implementation requires the use of non-classical light sources such as single photon sources: an exacting requirement. S ...
... extremely powerful quantum computers, the security of information transferred by quantum communication systems remains unthreatened. While these systems offer great promise, their implementation requires the use of non-classical light sources such as single photon sources: an exacting requirement. S ...
253.pdf
... characteristics is that the total carrier density 共n = n+ + n−兲 continues to increase even after the device has started lasing for n = nth,spin = nth / 共1 + ⌸s兲 which is the threshold carrier density for a spin laser. In contrast, the carrier density gets clamped at nth in a conventional laser. It i ...
... characteristics is that the total carrier density 共n = n+ + n−兲 continues to increase even after the device has started lasing for n = nth,spin = nth / 共1 + ⌸s兲 which is the threshold carrier density for a spin laser. In contrast, the carrier density gets clamped at nth in a conventional laser. It i ...
High resolution time-resolved imaging system in the
... originated from the fact that the spectral region is absorbed by air. The light in the VUV range should be used in a vacuum environment. The VUV radiations can be utilized for both bare and patterned wafer inspections by scattering. The intensity of scattered light is inversely proportional to its w ...
... originated from the fact that the spectral region is absorbed by air. The light in the VUV range should be used in a vacuum environment. The VUV radiations can be utilized for both bare and patterned wafer inspections by scattering. The intensity of scattered light is inversely proportional to its w ...
3D Finite Element Model for Writing Long
... micrometers. LPFGs require therefore simpler fabrication processes and have lower costs, and show lower retro-reflection, higher sensitivity and robustness in sensing applications when compared with FBG [8]. A LPFG can be produced mechanically [9], chemically (etching) [10], by photonic processes (u ...
... micrometers. LPFGs require therefore simpler fabrication processes and have lower costs, and show lower retro-reflection, higher sensitivity and robustness in sensing applications when compared with FBG [8]. A LPFG can be produced mechanically [9], chemically (etching) [10], by photonic processes (u ...
The Science and Engineering of Materials, 4th ed Donald R
... ©2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license. ...
... ©2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning™ is a trademark used herein under license. ...
Single-frequency continuous-wave optical parametric oscillator
... frequency-doubled idler (550–770 nm, up to 70 mW), the signal (656–1035 nm, up to 60 mW), and the idler (1096– 2830 nm, up to 800 mW). In addition, up to 1.25 mW of blue light is generated by non-phase-matched frequency doubling of the signal in the OPO crystal. Pump powers were between 0.8 and 3.3 ...
... frequency-doubled idler (550–770 nm, up to 70 mW), the signal (656–1035 nm, up to 60 mW), and the idler (1096– 2830 nm, up to 800 mW). In addition, up to 1.25 mW of blue light is generated by non-phase-matched frequency doubling of the signal in the OPO crystal. Pump powers were between 0.8 and 3.3 ...
Automatic Absolute Distance Measurement with One Micrometer
... reducing the sensitivity of interferometric measurement tools and thus makes it possible to increase the non-ambiguity range for interferometry [8]. The method described here provides accuracies of a small fraction of synthetic wavelength over distances up to 20 meters. In this paper, we explain a n ...
... reducing the sensitivity of interferometric measurement tools and thus makes it possible to increase the non-ambiguity range for interferometry [8]. The method described here provides accuracies of a small fraction of synthetic wavelength over distances up to 20 meters. In this paper, we explain a n ...
Director of laser and plasma research center, University of Baghdad
... A thesis submitted to Sudan University of Science and Technology as a partial fulfillment of the requirements for the degree of M.Sc. in laser applications/electronic engineering. By: Abdelkarim Mohammed Abdelgadir, August 2006. 21 - Utilization of different laser systems to determine the optical p ...
... A thesis submitted to Sudan University of Science and Technology as a partial fulfillment of the requirements for the degree of M.Sc. in laser applications/electronic engineering. By: Abdelkarim Mohammed Abdelgadir, August 2006. 21 - Utilization of different laser systems to determine the optical p ...
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Directional Reflection measurements on
... in the V and W modes of the VW accessory. The best way to cope with these alignment errors is to use an Integrating Sphere as detector, as shown in Fig. 5. In this case we have installed one of our reflection accessories in the sample compartment of our PerkinElmer Lambda 900 spectrophotometer and u ...
... in the V and W modes of the VW accessory. The best way to cope with these alignment errors is to use an Integrating Sphere as detector, as shown in Fig. 5. In this case we have installed one of our reflection accessories in the sample compartment of our PerkinElmer Lambda 900 spectrophotometer and u ...
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.