(DPSS) Lasers - Society of Education
... 1. User induced damage (such as mechanical, thermal or electrical shock or electrostatic discharge). 2. Intrinsic damage, which results from three main sources: (i) degradation of laser mirrors or facets because of high current densities or current spikes. This will increase internal losses and lead ...
... 1. User induced damage (such as mechanical, thermal or electrical shock or electrostatic discharge). 2. Intrinsic damage, which results from three main sources: (i) degradation of laser mirrors or facets because of high current densities or current spikes. This will increase internal losses and lead ...
Optics and Quantum Electronics—J. G. Fujimoto, H. A. Haus, E. P. Ippen, F. X. Kärtner
... emission over one octave of bandwidth. The development of compact and robust octave spanning lasers is of prime importance for optical frequency metrology and investigation of phase sensitive nonlinear optical processes. To achieve this broadband emission directly from the laser precise dispersion c ...
... emission over one octave of bandwidth. The development of compact and robust octave spanning lasers is of prime importance for optical frequency metrology and investigation of phase sensitive nonlinear optical processes. To achieve this broadband emission directly from the laser precise dispersion c ...
Symmetry breaking and strong coupling in planar optical
... [2,3,6,16]. Such resonant modes have been termed variously as dark modes, subradiant modes or trapped modes [16]. This nomenclature suggests that dark modes do not readily radiate since they are trapped within the resonator. These modes couple weakly to the free space and needs an external perturbat ...
... [2,3,6,16]. Such resonant modes have been termed variously as dark modes, subradiant modes or trapped modes [16]. This nomenclature suggests that dark modes do not readily radiate since they are trapped within the resonator. These modes couple weakly to the free space and needs an external perturbat ...
Microscopy - PSSurvival.com
... microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm ...
... microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm ...
Ultrasensitive absorption spectroscopy with a high
... hand, the mode width will eventually reach a lower limit dictated primarily by mechanical fluctuations in the system and irregularities in the mirror surfaces. At this point, the Fabry–Perot theory breaks down. Consequently, the peak transmission begins to fall, again to conserve energy. The limitin ...
... hand, the mode width will eventually reach a lower limit dictated primarily by mechanical fluctuations in the system and irregularities in the mirror surfaces. At this point, the Fabry–Perot theory breaks down. Consequently, the peak transmission begins to fall, again to conserve energy. The limitin ...
Portable Sensing Field Device
... yourself, are invaluable. The fact that laser range finders are now commercially available for relatively low prices does not change the complexity of building one yourself. Time-of-flight based rangefinders are extremely complex and require the designers to be extremely precise in their actions. T ...
... yourself, are invaluable. The fact that laser range finders are now commercially available for relatively low prices does not change the complexity of building one yourself. Time-of-flight based rangefinders are extremely complex and require the designers to be extremely precise in their actions. T ...
Sidelobe decline in single-photon 4Pi microscopy by Toraldo rings
... made in the so-called standing-wave microscopy (Bailey et al., 1993) and in 4Pi-confocal microscopy (Hell and Stelzer, 1992a). Standing-wave microscopy is a nonconfocal imaging technique, and therefore it does not provide any improvement in optical sectioning. In the 4Pi(c)-confocal microscope two o ...
... made in the so-called standing-wave microscopy (Bailey et al., 1993) and in 4Pi-confocal microscopy (Hell and Stelzer, 1992a). Standing-wave microscopy is a nonconfocal imaging technique, and therefore it does not provide any improvement in optical sectioning. In the 4Pi(c)-confocal microscope two o ...
Rodrigo Aviles‐Espinosa STRATEGIES FOR PUSHING NONLINEAR MICROSCOPY TOWARDS ITS PERFORMANCE LIMITS
... harmonic generation (THG) microscopy. Here, it is shown how the selection of the ultrashort pulsed laser (USPL) operating wavelength (1550 nm) is crucial for generating a signal that matches the peak sensitivity of most commercial detectors. This enables reducing up to seven times the light dose app ...
... harmonic generation (THG) microscopy. Here, it is shown how the selection of the ultrashort pulsed laser (USPL) operating wavelength (1550 nm) is crucial for generating a signal that matches the peak sensitivity of most commercial detectors. This enables reducing up to seven times the light dose app ...
Development of Mirror Coatings for Gravitational Wave Detectors
... cryogenically cool the suspended mirrors to directly reduce thermal noise through the reduction of the total thermal energy in the mirror [36,37]. However, the mechanical loss of some materials is strongly temperature dependent and, thus, cooling does not always result in a reduction in thermal nois ...
... cryogenically cool the suspended mirrors to directly reduce thermal noise through the reduction of the total thermal energy in the mirror [36,37]. However, the mechanical loss of some materials is strongly temperature dependent and, thus, cooling does not always result in a reduction in thermal nois ...
Novel Approach to the Study of Surface Plasmon Resonance and
... plasmon 2.4 eV (520nm). (b) Theoretical distribution of the electromagnetic field around a single particle at 1.9 eV (650 nm) for the longitudinal plasmon and the transverse plasmon at 2.4 eV (520 nm). . . . . . . . . . . . . . . . . . . . . . . . . ...
... plasmon 2.4 eV (520nm). (b) Theoretical distribution of the electromagnetic field around a single particle at 1.9 eV (650 nm) for the longitudinal plasmon and the transverse plasmon at 2.4 eV (520 nm). . . . . . . . . . . . . . . . . . . . . . . . . ...
Microscopy - Frank`s Hospital Workshop
... PSF which can be either derived experimentally or theoretically from knowing all contributing parameters of the microscope. ...
... PSF which can be either derived experimentally or theoretically from knowing all contributing parameters of the microscope. ...
Get
... was simulated according to Eq. (10) in [23]. The oscillatory behavior residing in the curves could be understood in terms of the dynamic response of CW coherent radiation to an optical cavity whose length is swept rapidly and continuously. The reflected signal shows a laser intensity dependent offse ...
... was simulated according to Eq. (10) in [23]. The oscillatory behavior residing in the curves could be understood in terms of the dynamic response of CW coherent radiation to an optical cavity whose length is swept rapidly and continuously. The reflected signal shows a laser intensity dependent offse ...
Optical Breakdown in Liquid Suspensions and Its Analytical
... tissues surgery [43, 44], selective cell targeting with lightabsorbing nanoparticles, chemical engineering, and generation of micro/nanoparticles. It is also relevant to numerous analytical applications based on laser plasma spectroscopy [45–48]. Laser-induced breakdown mechanism in air and in solid ...
... tissues surgery [43, 44], selective cell targeting with lightabsorbing nanoparticles, chemical engineering, and generation of micro/nanoparticles. It is also relevant to numerous analytical applications based on laser plasma spectroscopy [45–48]. Laser-induced breakdown mechanism in air and in solid ...
Noise analysis of spectrometers based on speckle pattern
... generated by interference of waveguided modes in a standard multimode optical fibers can also be used to build a spectrometer [5,6]. These all-fiber spectrometers combine high transmission with fine spectral resolution, which scales with the length of the fiber. Furthermore, commercial fibers are lo ...
... generated by interference of waveguided modes in a standard multimode optical fibers can also be used to build a spectrometer [5,6]. These all-fiber spectrometers combine high transmission with fine spectral resolution, which scales with the length of the fiber. Furthermore, commercial fibers are lo ...
High optical absorption in graphene
... contrast of the surrounding media [5]. This general limit for light absorption in ultrathin films may under favorable conditions (that is for high damping materials with nearly imaginary dielectric constant) be approached by tuning of the film thickness alone, as demonstrated by Driessen et al. [6,7 ...
... contrast of the surrounding media [5]. This general limit for light absorption in ultrathin films may under favorable conditions (that is for high damping materials with nearly imaginary dielectric constant) be approached by tuning of the film thickness alone, as demonstrated by Driessen et al. [6,7 ...
electromagnetically induced transparency - IAP TU
... superposition. The reader is referred to The Theory of Coherent Atomic Excitation by Shore10 for a complete account of these ideas. An important feature of EIT is the preparation of large populations of these coherently driven, uniformly phased atoms. Such media are termed phasesonium by Scully,7 to ...
... superposition. The reader is referred to The Theory of Coherent Atomic Excitation by Shore10 for a complete account of these ideas. An important feature of EIT is the preparation of large populations of these coherently driven, uniformly phased atoms. Such media are termed phasesonium by Scully,7 to ...
PPT-IIa - Laboratory for Remote Sensing Hydrology and Spatial
... Dept of Bioenvironmental Systems Engineering, National Taiwan Univ. ...
... Dept of Bioenvironmental Systems Engineering, National Taiwan Univ. ...
Changes in spatial extent and peak double optical density of human
... The macular pigment (MP) is a yellow pigment found in the human fovea in both the inner and outer layers of the retina, and located along the axons of the cone photoreceptors [1]. It is mainly composed of two xanthophylls, lutein and zeaxanthin [2]. MP has a peak absorption wavelength at 460 nm but ...
... The macular pigment (MP) is a yellow pigment found in the human fovea in both the inner and outer layers of the retina, and located along the axons of the cone photoreceptors [1]. It is mainly composed of two xanthophylls, lutein and zeaxanthin [2]. MP has a peak absorption wavelength at 460 nm but ...
Silicon waveguided components for the long
... we consider the currently most popular waveguide, the siliconon-insulator guide, we find, as described below, that the lowloss transmission range is quite limited, approximately 1.2– 3.6 µm for loss L < 2 dB cm−1 , which highlights the general problem of finding guiding structures with wider IR spec ...
... we consider the currently most popular waveguide, the siliconon-insulator guide, we find, as described below, that the lowloss transmission range is quite limited, approximately 1.2– 3.6 µm for loss L < 2 dB cm−1 , which highlights the general problem of finding guiding structures with wider IR spec ...
Blooming Thermal- Laboratory Experiments Bernadette Johnson
... Short-Wavelength Adaptive Techniques (SWAT) experiments, described by Ronald A. Humphreys et aI. NE OF THE GOALS ...
... Short-Wavelength Adaptive Techniques (SWAT) experiments, described by Ronald A. Humphreys et aI. NE OF THE GOALS ...
Medical applications of Terahertz Imaging: a Review of Current
... clinically prepared tissue samples, and secondly by imaging surface features using reflection geometry imaging. Transmission imaging, for obvious reasons, can only be carried out in vitro, whereas a reflection geometry set-up allows the possibility of in vivo imaging [11, 12]. The limited penetratio ...
... clinically prepared tissue samples, and secondly by imaging surface features using reflection geometry imaging. Transmission imaging, for obvious reasons, can only be carried out in vitro, whereas a reflection geometry set-up allows the possibility of in vivo imaging [11, 12]. The limited penetratio ...
Simultaneous spatial and temporal focusing: A route towards
... restricted to the focal region, thus enabling depth-resolved microscopy with improved signal-to-background contrast. The setup provides wide-field imaging with an enlarged focal spot avoiding the need of scanning the focal spot across the sample, since the focal spot size is determined by the input ...
... restricted to the focal region, thus enabling depth-resolved microscopy with improved signal-to-background contrast. The setup provides wide-field imaging with an enlarged focal spot avoiding the need of scanning the focal spot across the sample, since the focal spot size is determined by the input ...
Near-field thermal transport in a nanotip under laser irradiation
... narrow channel. As the tip–substrate distance increases, the peak field enhancement decreases exponentially. A shift of field peak position away from the tip axis is observed. For the incident light, only its component along the tip axis direction has a contribution to the electric field enhancement ...
... narrow channel. As the tip–substrate distance increases, the peak field enhancement decreases exponentially. A shift of field peak position away from the tip axis is observed. For the incident light, only its component along the tip axis direction has a contribution to the electric field enhancement ...
han_2000_apl
... train is achieved by cross correlating it with the single 780 nm pulse in a BBO crystal. The crosscorrelation waveform is monitored in real time while the multi-zoned PPLN is translated in the beam to produce an optimum pulse train, in terms of pulse spacing, efficiency, and uniformity. The results ...
... train is achieved by cross correlating it with the single 780 nm pulse in a BBO crystal. The crosscorrelation waveform is monitored in real time while the multi-zoned PPLN is translated in the beam to produce an optimum pulse train, in terms of pulse spacing, efficiency, and uniformity. The results ...
AFM-IR
AFM-IR refers to atomic force microscope (AFM) based infrared (IR) spectroscopy. AFM-IR is a technique for chemical analysis of samples at nanoscale spatial resolution. AFM-IR is related to techniques including Tip-Enhanced Raman Spectroscopy (TERS) and scanning near-field optical microscopy (SNOM) and other methods of vibrational analysis with scanning probe microscopy. The AFM-IR technique uses a sharp tip of an AFM probe to measure the absorption of infrared light by a sample. Recording the amount of IR absorption as a function of wavelength or wavenumber creates nanoscale IR absorption spectra, which can be used to chemically characterize and even identify unknown materials. Recording the IR absorption as a function of position can be used to create chemical composition maps that show the spatial distribution of different chemical components. AFM-IR can overcome the diffraction limit that limits the spatial resolution of conventional infrared microscopy and microspectroscopy to the scale of several microns. AFM-IR can achieve spatial resolution down to around 20 nm, limited in some case only by the sharpness of the AFM probe tip and sensitivity down to the scale of molecular monolayers.