Beam steering with spatial light modulators: Quantisation effects
... the focal spot have been captured by a camera and accurately determined by image processing. Measurements were done with N=100 and M=16. We proved that quantisation effects are not relevant in most of the positions, except for certain locations, which produce such errors on spot positioning that nee ...
... the focal spot have been captured by a camera and accurately determined by image processing. Measurements were done with N=100 and M=16. We proved that quantisation effects are not relevant in most of the positions, except for certain locations, which produce such errors on spot positioning that nee ...
HEAVY ION BEAM ACCELERATION
... axial field and inflector can be minimized, not cancelled, by selection of a proper rotation angle of the coordinate system of the injected uncoupled beam and the inflector. The formalism developed by Bellomo et. al [2] has been followed to study the effect of the mirror on phase space for mirror t ...
... axial field and inflector can be minimized, not cancelled, by selection of a proper rotation angle of the coordinate system of the injected uncoupled beam and the inflector. The formalism developed by Bellomo et. al [2] has been followed to study the effect of the mirror on phase space for mirror t ...
Organic Nonlinear Optic Devices
... – T. Gabler et al., “Application of the polyconjugated main chain polymer DPOP-PPV for ultrafast all-optical switching in a nonlinear directional coupler,” Journal of Chemical Physics, Vol. 245, pp. 507-516, 1999. ...
... – T. Gabler et al., “Application of the polyconjugated main chain polymer DPOP-PPV for ultrafast all-optical switching in a nonlinear directional coupler,” Journal of Chemical Physics, Vol. 245, pp. 507-516, 1999. ...
to - UCL Medical Physics and Biomedical Engineering
... of line-of-sight imaging the detector needs to be in the non-divergent near field of the photoacoustic source. From the lateral dimensions of the absorber (3mm) and estimating the acoustic wavelength at 1.5mm the absorber should be no further than 1.5mm away from the detector if it is to lie in the ...
... of line-of-sight imaging the detector needs to be in the non-divergent near field of the photoacoustic source. From the lateral dimensions of the absorber (3mm) and estimating the acoustic wavelength at 1.5mm the absorber should be no further than 1.5mm away from the detector if it is to lie in the ...
978-1-4577-0274-7/11/$26.00 ©2011 IEEE DSP2011
... computation with robust estimators [6, 7] was proposed to alleviate the effect of integrating outlying data. Small sized segments were employed in [8] but the approach has the shortcoming that small segments cannot faithfully represent the structure of natural scenes and they weaken the advantage pr ...
... computation with robust estimators [6, 7] was proposed to alleviate the effect of integrating outlying data. Small sized segments were employed in [8] but the approach has the shortcoming that small segments cannot faithfully represent the structure of natural scenes and they weaken the advantage pr ...
Optical, Confocal, and 4Pi Microscopy
... cell, man has continually attempted to view smaller and smaller objects. In 1873, Ernst Abbe first discovered that diffraction limited the resolution of the optical microscope. And even with the advances in confocal and multiphoton microscopes, these limitations have never been lifted. However, in r ...
... cell, man has continually attempted to view smaller and smaller objects. In 1873, Ernst Abbe first discovered that diffraction limited the resolution of the optical microscope. And even with the advances in confocal and multiphoton microscopes, these limitations have never been lifted. However, in r ...
Fiber Optic Communications
... – When an external voltage is applied in forward bias (positive terminal attached to the positively doped region), current will flow through the p-n junction. – When the external voltage is applied in reverse, no current will flow through the p-n junction. ...
... – When an external voltage is applied in forward bias (positive terminal attached to the positively doped region), current will flow through the p-n junction. – When the external voltage is applied in reverse, no current will flow through the p-n junction. ...
From near-field optics to optical antennas
... Although spectra of single molecules had been detected years earlier, it was near-field imaging that jump-started the field of single-molecule biophysics. Ironically, shortly after Betzig’s breakthrough experiment, researchers realized that ordinary light microscopy can also detect the fluorescence ...
... Although spectra of single molecules had been detected years earlier, it was near-field imaging that jump-started the field of single-molecule biophysics. Ironically, shortly after Betzig’s breakthrough experiment, researchers realized that ordinary light microscopy can also detect the fluorescence ...
- Natural Sciences Publishing
... Abstract: GexSb40-xSe60 (where 10≤ x≤ 30 at %) thin films were prepared on glass substrates by thermal evaporation technique. X-ray diffraction analysis for as – deposited films showed that they have amorphous structure. The optical constants of the as- deposited films were calculated from optical t ...
... Abstract: GexSb40-xSe60 (where 10≤ x≤ 30 at %) thin films were prepared on glass substrates by thermal evaporation technique. X-ray diffraction analysis for as – deposited films showed that they have amorphous structure. The optical constants of the as- deposited films were calculated from optical t ...
Experimental test of beam splitter techniques
... performed reducing for a short time the height of the barrier to allow the tunneling of the atoms from one well to the other with a one half probability. In addition a fine-‐tuning ...
... performed reducing for a short time the height of the barrier to allow the tunneling of the atoms from one well to the other with a one half probability. In addition a fine-‐tuning ...
SRON presentation - University of Groningen
... But: “Pure” (geometrical) optical systems would require components much larger than λ. In sub- /mm range diffraction is important, and quasi-optics handles this in a theorectical way. ...
... But: “Pure” (geometrical) optical systems would require components much larger than λ. In sub- /mm range diffraction is important, and quasi-optics handles this in a theorectical way. ...
Imaging visible light using anisotropic metamaterial slab lens Jie Yao, Kun-Tong Tsai,
... Abstract: It has been shown that an anisotropic metamaterial made of nanowire array can realize negative refraction of light even without a negative phase index of refraction. Such non-resonant bulk material can be fabricated by bottom-up electrochemical method. Using this material, we were able to ...
... Abstract: It has been shown that an anisotropic metamaterial made of nanowire array can realize negative refraction of light even without a negative phase index of refraction. Such non-resonant bulk material can be fabricated by bottom-up electrochemical method. Using this material, we were able to ...
Laser Collimation of a Chromium Beam Using Doppler Force Wen
... probe beam, to measure the amount of collimation. In this experiment both the cooling beam and the probe beam had the same frequency. The cooling laser beam was expanded using cylindrical lenses to a 1/e2 width of 24 mm along the atom beam and a 1/e2 width of 3 mm transverse to the atom beam. This l ...
... probe beam, to measure the amount of collimation. In this experiment both the cooling beam and the probe beam had the same frequency. The cooling laser beam was expanded using cylindrical lenses to a 1/e2 width of 24 mm along the atom beam and a 1/e2 width of 3 mm transverse to the atom beam. This l ...
The Michelson Interferometer and Its Applications
... Enter Albert Michelson. Michelson conjectured that if the speed of light relative to the hypothetical aether was indeed constant, then the Earth’s orbital velocity relative to this aether should exhibit obser ...
... Enter Albert Michelson. Michelson conjectured that if the speed of light relative to the hypothetical aether was indeed constant, then the Earth’s orbital velocity relative to this aether should exhibit obser ...
Biomolecular and cellular research devices.
... http://www.columbia.edu/cu/chemistry/edison/IRTutor.html ...
... http://www.columbia.edu/cu/chemistry/edison/IRTutor.html ...
Laser oscillation in proton implanted Nd:YAG waveguides
... To obtain the waveguide refractive index profile, the propagation constants of the modes were measured by the standard m-line method, using a rutile prism to couple the light into the waveguide coming from a polarized He-Ne laser (λ=633nm). A CW Ti:sapphire laser, with a tuning range between 750-85 ...
... To obtain the waveguide refractive index profile, the propagation constants of the modes were measured by the standard m-line method, using a rutile prism to couple the light into the waveguide coming from a polarized He-Ne laser (λ=633nm). A CW Ti:sapphire laser, with a tuning range between 750-85 ...
Optical Components and Devices for Next-Generation
... integrates four AOTFs on a chip. To adopt AOTFs for WDM systems, sidelobe levels in the filter characteristics have to be suppressed. Apodization methods using SAW guides have already been proposed to reduce sidelobe levels. However, we have proposed and demonstrated a novel apodization method. Figu ...
... integrates four AOTFs on a chip. To adopt AOTFs for WDM systems, sidelobe levels in the filter characteristics have to be suppressed. Apodization methods using SAW guides have already been proposed to reduce sidelobe levels. However, we have proposed and demonstrated a novel apodization method. Figu ...
Optical fiber communication
... The leading edge causes the R.I of the fiber to rise, resulting in a blue shift. The falling edge causes the R.I of the fiber fall causing a red shift ...
... The leading edge causes the R.I of the fiber to rise, resulting in a blue shift. The falling edge causes the R.I of the fiber fall causing a red shift ...
EE 230: Optical Fiber Communication Lecture 7
... Inhomogeneous Gain Broadening Inhomogeneous broadening The individual atomic responses within and inhomogeneously broadened transition all add up to yield the measured lineshape ...
... Inhomogeneous Gain Broadening Inhomogeneous broadening The individual atomic responses within and inhomogeneously broadened transition all add up to yield the measured lineshape ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.