Three Lasers Converging at a Focal Point : A Demonstration
... The point at which parallel light rays meet is called the focal point. The distance from the lens to the point where the light rays meet is called the focal length. What You Need For the class: 3 laser pointers 1 acrylic block 1 velum screen or a wall 1 large positive lens mister For e ...
... The point at which parallel light rays meet is called the focal point. The distance from the lens to the point where the light rays meet is called the focal length. What You Need For the class: 3 laser pointers 1 acrylic block 1 velum screen or a wall 1 large positive lens mister For e ...
Wollaston and Nomarski Prisms
... Birefringent Wollaston and/or Nomarski prisms are inserted in the optical pathway with their shear axis oriented at a 45-degree angle (northwest to southeast) to the polarizer and analyzer. The prisms are composed of two precisely ground and polished wedge-shaped slabs produced from high-grade optic ...
... Birefringent Wollaston and/or Nomarski prisms are inserted in the optical pathway with their shear axis oriented at a 45-degree angle (northwest to southeast) to the polarizer and analyzer. The prisms are composed of two precisely ground and polished wedge-shaped slabs produced from high-grade optic ...
Qn_Bank1
... Give the theory of Compton effect and briefly explain its experimental verification. (16) (i) Derive time-independent Schrodinger wave equation. (6) (ii)Using time-independent Schrodinger wave equation normalize the wave function of electron trapped in a Onedimensional potential well. (10) Compare S ...
... Give the theory of Compton effect and briefly explain its experimental verification. (16) (i) Derive time-independent Schrodinger wave equation. (6) (ii)Using time-independent Schrodinger wave equation normalize the wave function of electron trapped in a Onedimensional potential well. (10) Compare S ...
report - CREATE project
... instead of 75 fs, centered at the same wavelength, we should obtain 2.5 fold higher signal. However reduced pulse duration is associated with increased bandwidth of the laser, thus dealing with the dispersion by the optical elements becomes more difficult. For such a short pulses as 30 fs the higher ...
... instead of 75 fs, centered at the same wavelength, we should obtain 2.5 fold higher signal. However reduced pulse duration is associated with increased bandwidth of the laser, thus dealing with the dispersion by the optical elements becomes more difficult. For such a short pulses as 30 fs the higher ...
Fiber Optic
... The advantagesof using a laser diode are in the high modulation bandwidth ( over 2 GHz ), with high optical output power and narrow spectral width. Their application is in long distance, high data rate requirements. Lasers are common in single mode optical fiber applications and their light power co ...
... The advantagesof using a laser diode are in the high modulation bandwidth ( over 2 GHz ), with high optical output power and narrow spectral width. Their application is in long distance, high data rate requirements. Lasers are common in single mode optical fiber applications and their light power co ...
Proposal for an Optical Laser Producing Light at Half the... Frans Godschalk, Fabian Hassler, and Yuli V. Nazarov
... the Josephson frequency !J ¼ 2 eV=@ due to the recombination of a Cooper pair from each side of the junction and ‘‘red’’ photons at about !J =2 due to electron-hole recombination. It has been shown that the optical phase of the Josephson generated blue photons is locked with the SC phase difference. ...
... the Josephson frequency !J ¼ 2 eV=@ due to the recombination of a Cooper pair from each side of the junction and ‘‘red’’ photons at about !J =2 due to electron-hole recombination. It has been shown that the optical phase of the Josephson generated blue photons is locked with the SC phase difference. ...
Synopses by Kim Larsen
... which breaks up the expression into a beam profile dependent term, a beam and path dependent term, and the figure of merit for the window defined in Equation 1. The only approximation to completely determine the figure of merit is to assume that the surface absorption effects are significantly smal ...
... which breaks up the expression into a beam profile dependent term, a beam and path dependent term, and the figure of merit for the window defined in Equation 1. The only approximation to completely determine the figure of merit is to assume that the surface absorption effects are significantly smal ...
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.