Paper Title
... many advantages due to high tunability of the acousto-optical technique. Namely, exciting frequency (and therefore grating period) can be adjusted with ppm accuracy to any value in the kHz – GHz region, enabling therefore tuning (scaling) the given waveguide to many available lasers or other narrow- ...
... many advantages due to high tunability of the acousto-optical technique. Namely, exciting frequency (and therefore grating period) can be adjusted with ppm accuracy to any value in the kHz – GHz region, enabling therefore tuning (scaling) the given waveguide to many available lasers or other narrow- ...
Model for estimating the penetration depth limit of
... Because biological tissues are optically turbid, biomedical optical techniques have very limited penetration depth. The depth limit is essentially given by the characteristic length at which photons lose their directionality (one transport mean free path). Although it depends on the type of tissue a ...
... Because biological tissues are optically turbid, biomedical optical techniques have very limited penetration depth. The depth limit is essentially given by the characteristic length at which photons lose their directionality (one transport mean free path). Although it depends on the type of tissue a ...
Measurement of the THz emission from a femtosecond laser filament
... laser filament in air is measured with a bolometric detector and a set of filters, confirming that the main part of the emission lies between 0.5 and 3 THz. The efficiency of this THz emission is compared with that obtained in air via Four Waves Mixing of femtosecond laser pulses at ω and 2 ω in the ...
... laser filament in air is measured with a bolometric detector and a set of filters, confirming that the main part of the emission lies between 0.5 and 3 THz. The efficiency of this THz emission is compared with that obtained in air via Four Waves Mixing of femtosecond laser pulses at ω and 2 ω in the ...
High efficiency high power blue laser by resonant doubling in PPKTP.
... CHAPTER 1. INTRODUCTION ....................................................................................................1 Aim and Motivation .............................................................................................................1 Significance of the Work ................... ...
... CHAPTER 1. INTRODUCTION ....................................................................................................1 Aim and Motivation .............................................................................................................1 Significance of the Work ................... ...
Wavelength verification of laser through varied slit widths using a
... like laser, can be determined. This is through the working equation: = . Through the CCD (charge-coupled device), the diffraction of the light was seen and using the Vision Assistant Program, the order for the destructive interference was known. The manipulated variable in this research ...
... like laser, can be determined. This is through the working equation: = . Through the CCD (charge-coupled device), the diffraction of the light was seen and using the Vision Assistant Program, the order for the destructive interference was known. The manipulated variable in this research ...
Research on the Design of an Optical Information Storage Sensing
... main optical path by the dichroic mirror and detected by a photomultiplier tube (PMT). The remaining recording beam is filtered out by the color filter. In this system, two beams are realized in a single main optical path by the use of one laser and one objective lens, which might prove to be a reli ...
... main optical path by the dichroic mirror and detected by a photomultiplier tube (PMT). The remaining recording beam is filtered out by the color filter. In this system, two beams are realized in a single main optical path by the use of one laser and one objective lens, which might prove to be a reli ...
Saturation
... In case the incident wave with spectral energy density ( ) I ( ) c And spectral width L Which is large compared to the halfwidth of the Absorption profile L The total intensity becomes I I ( )d I ( 0 ) L ...
... In case the incident wave with spectral energy density ( ) I ( ) c And spectral width L Which is large compared to the halfwidth of the Absorption profile L The total intensity becomes I I ( )d I ( 0 ) L ...
Technical Digest Post-Deadline Papers
... difficulties for the optical system because the conventional optical pickup for the single/dual layer disc can be used without needing any changes to its basic optical structure to be applicable for the medium. Until recently, BD read-onlymemory discs of 100 and 200 GB with 4 and 8 layers, respectiv ...
... difficulties for the optical system because the conventional optical pickup for the single/dual layer disc can be used without needing any changes to its basic optical structure to be applicable for the medium. Until recently, BD read-onlymemory discs of 100 and 200 GB with 4 and 8 layers, respectiv ...
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.