Erbium-implanted high-Q silica toroidal microcavity laser
... of 1552.9 nm, erbium ion concentration of 2 ⫻ 1019 cm−3, and a cavity diameter of 50 m coupled to a phase-matched tapered fiber. In the highly undercoupled regime (large gap width between the microcavity and the tapered fiber), the normalized erbium upper-state population is determined by intrinsic ...
... of 1552.9 nm, erbium ion concentration of 2 ⫻ 1019 cm−3, and a cavity diameter of 50 m coupled to a phase-matched tapered fiber. In the highly undercoupled regime (large gap width between the microcavity and the tapered fiber), the normalized erbium upper-state population is determined by intrinsic ...
A mobile, high-precision atom-interferometer and its
... (GAIN) project has been started to meet this requirement and to provide best possible accuracy at the same time. It aims to realize an alternative to other types of gravimeters and to combine important qualities such as high sensitivity and absolute accuracy in one instrument. The GAIN sensor is bas ...
... (GAIN) project has been started to meet this requirement and to provide best possible accuracy at the same time. It aims to realize an alternative to other types of gravimeters and to combine important qualities such as high sensitivity and absolute accuracy in one instrument. The GAIN sensor is bas ...
Silicon optical modulators - Optoelectronics Research Centre
... the added value that optical interconnect brings could justify a larger power consumption. Note that today typical electrical consumption of servers is of the order of 10-30pJ/bit [5] and hence one may not necessarily need an order or magnitude improvement to justify value. Similarly typical commer ...
... the added value that optical interconnect brings could justify a larger power consumption. Note that today typical electrical consumption of servers is of the order of 10-30pJ/bit [5] and hence one may not necessarily need an order or magnitude improvement to justify value. Similarly typical commer ...
Lock Acquisition in Resonant Optical Interferometers
... 1.2.3 Power Recycling Many of the detectors that will begin to collect data in the coming years are \Power Recycled" interferometers.[8] This con guration adds an optic, the \Power Recycling ...
... 1.2.3 Power Recycling Many of the detectors that will begin to collect data in the coming years are \Power Recycled" interferometers.[8] This con guration adds an optic, the \Power Recycling ...
Post compression of high-energy femto
... It is very important that the pulse is broadened in such a way, that it is recompressible in order to create a pulse with a good temporal shape. Avoiding nonlinear effects as well as selecting the central part of the beam with a pinhole (because that is where the spectral broadening is the biggest) ...
... It is very important that the pulse is broadened in such a way, that it is recompressible in order to create a pulse with a good temporal shape. Avoiding nonlinear effects as well as selecting the central part of the beam with a pinhole (because that is where the spectral broadening is the biggest) ...
Laser Cooling and Trapping of Metastable Neon and Applications to
... be used for cooling [3]. A proposal for using radiation pressure to three-dimensionally trap atoms, based on the dipole force, was presented by Ashkin in 1978 [4]. In fact, Ashkin had realized in 1970 [5] the magnitude of radiation pressure from lasers and ...
... be used for cooling [3]. A proposal for using radiation pressure to three-dimensionally trap atoms, based on the dipole force, was presented by Ashkin in 1978 [4]. In fact, Ashkin had realized in 1970 [5] the magnitude of radiation pressure from lasers and ...
Adaptive-Optics Compensation through a High-Gain Raman Amplifier of
... The results described in this article support the feasibility of the Raman look-through technique. The initial experiment, conducted at Lincoln Laboratory. joined the Atmospheric Compensation Experiment (ACE) adaptive-optics system with a Raman amplifier pumped by a laboratory excimer laser [31. The ...
... The results described in this article support the feasibility of the Raman look-through technique. The initial experiment, conducted at Lincoln Laboratory. joined the Atmospheric Compensation Experiment (ACE) adaptive-optics system with a Raman amplifier pumped by a laboratory excimer laser [31. The ...
High-Temperature Operation of Terahertz Quantum Cascade Laser
... widely tunable THz sources that are suitable for production in large quantities. The power generated by electronic devices (e.g., backward wave oscillators, Gunn and resonant tunneling diode oscillators, and Schottky diode multipliers) is currently well below the milliwatt level for frequencies abov ...
... widely tunable THz sources that are suitable for production in large quantities. The power generated by electronic devices (e.g., backward wave oscillators, Gunn and resonant tunneling diode oscillators, and Schottky diode multipliers) is currently well below the milliwatt level for frequencies abov ...
Polarization Entanglement Storage in Ensemble-Based ARCHIVES
... achieve tasks unrealizable by classical means, such as accurate teleportation of quantum states and unconditionally secure private key distribution. For such applications, the fundamental problem of quantum communication is the establishment, over optical channels, of entanglement between distant no ...
... achieve tasks unrealizable by classical means, such as accurate teleportation of quantum states and unconditionally secure private key distribution. For such applications, the fundamental problem of quantum communication is the establishment, over optical channels, of entanglement between distant no ...
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.