Phys. Rev. Lett. 102, 223901 (2009)
... alternated using a chopper at 100 Hz, and for each data point the fluorescence counts for both situations are recorded. The fluorescence signal detected at 397 nm will now be unaffected by the presence of the comb laser for the periods where the 854 nm repumper is present (‘‘repumper on’’ in the upp ...
... alternated using a chopper at 100 Hz, and for each data point the fluorescence counts for both situations are recorded. The fluorescence signal detected at 397 nm will now be unaffected by the presence of the comb laser for the periods where the 854 nm repumper is present (‘‘repumper on’’ in the upp ...
Second harmonic generation via total internal reflection quasi
... is focussed however on filtering applications such as add-drop filters. However this paper considers nonlinear phenomena with the principal aim to demonstrate the use of the hexagonal microcavity for an efficient SHG process by utilising the power build-up in an optical resonator. The choice of the ...
... is focussed however on filtering applications such as add-drop filters. However this paper considers nonlinear phenomena with the principal aim to demonstrate the use of the hexagonal microcavity for an efficient SHG process by utilising the power build-up in an optical resonator. The choice of the ...
Optical measurement of the gas number density in a Fabry-
... The refractive index can be assessed accurately by placing the gas sample inside a Fabry–Perot resonator and measuring the frequency of a given mode of the cavity. The frequency of the qth cavity mode can be expressed as cq ...
... The refractive index can be assessed accurately by placing the gas sample inside a Fabry–Perot resonator and measuring the frequency of a given mode of the cavity. The frequency of the qth cavity mode can be expressed as cq ...
VeeMAX UV-Visible Variable Angle Specular Reflectance Accessory
... Angles for Special Applications • Mirrors operating at 45° on laser tables are required to direct the beam through experiments in research applications. • Hot mirrors, cold mirrors and bandpass mirrors have different cut-on and cut-off wavelengths depending on the angle of incidence. How does a shif ...
... Angles for Special Applications • Mirrors operating at 45° on laser tables are required to direct the beam through experiments in research applications. • Hot mirrors, cold mirrors and bandpass mirrors have different cut-on and cut-off wavelengths depending on the angle of incidence. How does a shif ...
Light amplificated by stimulated emission of radiation
... The pump intensity must be sufficiently high. Lasers are often pumped with intensities of the order of the saturation intensity of the laser transition, but fourlevel lasers can also be operated with lower pump intensities. Depending on the geometry, there can be more or less stringent requirements ...
... The pump intensity must be sufficiently high. Lasers are often pumped with intensities of the order of the saturation intensity of the laser transition, but fourlevel lasers can also be operated with lower pump intensities. Depending on the geometry, there can be more or less stringent requirements ...
N. Qureshi, H. Schmidt, A. Hawkins, “Near
... magnetized material experiences a rotation in the plane of polarization upon reflection6. This results from the fact that the material has different refractive indices for the two circularly polarized components of the light. This effect is used extensively in research and in industry as a non-invas ...
... magnetized material experiences a rotation in the plane of polarization upon reflection6. This results from the fact that the material has different refractive indices for the two circularly polarized components of the light. This effect is used extensively in research and in industry as a non-invas ...
Lecture 1
... • Some people regard photonics as exclusively optical, while others also include electronic interactions. We will take this second point of view. • Although photonics has many applications, the main use to date has been for optical communications, and this is what has driven many advances in photoni ...
... • Some people regard photonics as exclusively optical, while others also include electronic interactions. We will take this second point of view. • Although photonics has many applications, the main use to date has been for optical communications, and this is what has driven many advances in photoni ...
Quantum Phase Noise and Field Correlation in Single Frequency
... the normalized time-delay T,,i.e., for completely decorrelated homodyne detection of beams with correlated phase and phase 0 vanishes. On quadrature [21]. Theresultsindicateforeach fields: its dependence on the phase matching case that the the other hand for a value of T , close to zero it becomes v ...
... the normalized time-delay T,,i.e., for completely decorrelated homodyne detection of beams with correlated phase and phase 0 vanishes. On quadrature [21]. Theresultsindicateforeach fields: its dependence on the phase matching case that the the other hand for a value of T , close to zero it becomes v ...
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.