Self-Organization, Broken Symmetry, and Lasing in an Atomic Vapor:
... resonant with the D1 transition (3S1y2 ! 3P1y2 ), lasing was not observed. We attribute this to the lack of a closed two-level system on this transition and to competition with the strong forward D1 Raman laser [12]. The peak reverse intracavity fluence (normalized to pump intensity) was 0.03, 0.08, ...
... resonant with the D1 transition (3S1y2 ! 3P1y2 ), lasing was not observed. We attribute this to the lack of a closed two-level system on this transition and to competition with the strong forward D1 Raman laser [12]. The peak reverse intracavity fluence (normalized to pump intensity) was 0.03, 0.08, ...
... As follows from Sec. 2, the modulation of spatial coherence may be achieved by transmitting the optical field through a thin diffusion screen with the complex amplitude transmittance which is randomly changed in time. Such a screen may be created in practice by means of the electrically controlled s ...
Rejection of two-photon fluorescence background in
... Because two-photon excited fluorescence (TPEF) is dominantly generated by ballistic (unscattered) light, TPEF microscopy maintains high resolution even within scattering media [1, 2, 3]. According to Beer’s law, the proportion of ballistic light arriving at the focus decays roughly exponentially wit ...
... Because two-photon excited fluorescence (TPEF) is dominantly generated by ballistic (unscattered) light, TPEF microscopy maintains high resolution even within scattering media [1, 2, 3]. According to Beer’s law, the proportion of ballistic light arriving at the focus decays roughly exponentially wit ...
G040254-00 - DCC
... • Two sites in the US, Louisiana and Washington Mirror • Michelson interferometers with Fabry-Perot arms Recycling Mirror • Whole optical path enclosed in vacuum Laser/MC • Sensitive to strains around 10-21 6W ...
... • Two sites in the US, Louisiana and Washington Mirror • Michelson interferometers with Fabry-Perot arms Recycling Mirror • Whole optical path enclosed in vacuum Laser/MC • Sensitive to strains around 10-21 6W ...
Fiberoptic Sample Holder (FOSH): Characteristics and Uses APPLICATION NOTE 1056-201
... The sample-holder section of the FOSH consists of a spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid ...
... The sample-holder section of the FOSH consists of a spring-loaded slide assembly of nested quartz tubes. The sample-holder components are almost entirely quartz, which minimizes the magnetic background signal from the sample holder. Samples are mounted in a small quartz bucket that has a quartz lid ...
A method for controlling the bandwidth of high-energy, few
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
Doppler-Free Saturated Absorption Spectroscopy of Rubidium Using a Tunable Diode Laser
... to avoid air currents, and mounting the cavity on rubber cushions to reduce the movement due to vibrations [1]. Tunable diode lasers’ narrow linewidth makes them particularly useful for high resolution spectroscopy. Recall, atomic spectral lines are due to transitions in an atom between energy level ...
... to avoid air currents, and mounting the cavity on rubber cushions to reduce the movement due to vibrations [1]. Tunable diode lasers’ narrow linewidth makes them particularly useful for high resolution spectroscopy. Recall, atomic spectral lines are due to transitions in an atom between energy level ...
SHS_OH_flame_ApplOpt_revision_RJB
... then sent through a telescope composed of an f = -125 mm lens followed by a f = 200 mm lens. The telescope delivers a ~ 40 mm diameter beam with ~ 0.45 degree half angle divergence to the SHS instrument. This beam then enters the SHS instrument through the input bandpass filter. The light is split b ...
... then sent through a telescope composed of an f = -125 mm lens followed by a f = 200 mm lens. The telescope delivers a ~ 40 mm diameter beam with ~ 0.45 degree half angle divergence to the SHS instrument. This beam then enters the SHS instrument through the input bandpass filter. The light is split b ...
A compact laser head with high-frequency stability for Rb atomic
... previously reported by Ye et al. for diode laser stabilization to Rb saturated absorption resonances, which however used a significantly larger and more sophisticated setup.30 In order to evaluate the sources of limitations to the frequency stability measured at medium-term integration times around ...
... previously reported by Ye et al. for diode laser stabilization to Rb saturated absorption resonances, which however used a significantly larger and more sophisticated setup.30 In order to evaluate the sources of limitations to the frequency stability measured at medium-term integration times around ...
Three-Dimensional Mapping of Near-Field Interactions via Single-Photon Tomography Benjamin D. Mangum,
... a host of nanoscale phenomena and emerging nanotechnology applications. Such interactions can be altered by proximate surfaces, particularly near nanostructures with sharp facets such as lightning rods,1,2 optical antennae,3-5 and roughened surfaces.6-8 For example, in surface-enhanced Raman spectro ...
... a host of nanoscale phenomena and emerging nanotechnology applications. Such interactions can be altered by proximate surfaces, particularly near nanostructures with sharp facets such as lightning rods,1,2 optical antennae,3-5 and roughened surfaces.6-8 For example, in surface-enhanced Raman spectro ...
Title Magnetic Light-Matter Interactions in a Photonic Crystal
... a clear hallmark of a probe-induced shift r0 ! r ðx; yÞ of the cavity resonance: as the resonance wavelength shifts away from the laser wavelength, there is less coupling from the waveguide to the cavity. Less coupling, in turn, reduces the overall losses that the light experiences in the waveguid ...
... a clear hallmark of a probe-induced shift r0 ! r ðx; yÞ of the cavity resonance: as the resonance wavelength shifts away from the laser wavelength, there is less coupling from the waveguide to the cavity. Less coupling, in turn, reduces the overall losses that the light experiences in the waveguid ...
Modulation of spatial coherence of optical field by means of liquid
... As follows from Sec. 2, the modulation of spatial coherence may be achieved by transmitting the optical field through a thin diffusion screen with the complex amplitude transmittance which is randomly changed in time. Such a screen may be created in practice by means of the electrically controlled s ...
... As follows from Sec. 2, the modulation of spatial coherence may be achieved by transmitting the optical field through a thin diffusion screen with the complex amplitude transmittance which is randomly changed in time. Such a screen may be created in practice by means of the electrically controlled s ...
[pdf]
... In this study computer-generated data are obtained from exact solutions to Eq. (4) for the case of a f luorescent sphere in a uniform background.19 Using forward amplitude and phase data (with added 1% amplitude and 0.1± phase noise), we have reconstructed images of h and t. The measurement geometry ...
... In this study computer-generated data are obtained from exact solutions to Eq. (4) for the case of a f luorescent sphere in a uniform background.19 Using forward amplitude and phase data (with added 1% amplitude and 0.1± phase noise), we have reconstructed images of h and t. The measurement geometry ...
Get PDF - OSA Publishing
... enhances the nonlinear susceptibility χ(n) of order n. If permitted by selection rules, this supports generation of the n-th harmonics of the driving laser or frequency mixing processes with m additional photons from the same laser field, e.g. generating harmonics of order (n + m). Such resonantly-e ...
... enhances the nonlinear susceptibility χ(n) of order n. If permitted by selection rules, this supports generation of the n-th harmonics of the driving laser or frequency mixing processes with m additional photons from the same laser field, e.g. generating harmonics of order (n + m). Such resonantly-e ...
LAB LASER OPERATOR
... by at a metastable level, the decay is excited by the narrow decay. Mirror cavity photons are in phase and the emitted light wave in phase and intense ...
... by at a metastable level, the decay is excited by the narrow decay. Mirror cavity photons are in phase and the emitted light wave in phase and intense ...
Optical Materials for LWIR Applications
... window). For example, if the material is going to be used as a lens, optical properties such as index of refraction and dispersion are important to consider. Other important optical properties include reflection, absorption, birefringence, and temperature coefficient of refractive index (dn/dT). Ref ...
... window). For example, if the material is going to be used as a lens, optical properties such as index of refraction and dispersion are important to consider. Other important optical properties include reflection, absorption, birefringence, and temperature coefficient of refractive index (dn/dT). Ref ...
Tuneable, stabilised diode lasers for compact atomic frequency
... theoretical limit for the long-term stability of both schemes calculated from this analysis of experimental parameters, as well as the short-term stability limit determined from the signal-to-noise ratio of the resonance error signals. Fig. 4 summarises the experimentally measured laser frequency st ...
... theoretical limit for the long-term stability of both schemes calculated from this analysis of experimental parameters, as well as the short-term stability limit determined from the signal-to-noise ratio of the resonance error signals. Fig. 4 summarises the experimentally measured laser frequency st ...
Magnetic Light-Matter Interactions in a Photonic Crystal Nanocavity
... a clear hallmark of a probe-induced shift r0 ! r ðx; yÞ of the cavity resonance: as the resonance wavelength shifts away from the laser wavelength, there is less coupling from the waveguide to the cavity. Less coupling, in turn, reduces the overall losses that the light experiences in the waveguid ...
... a clear hallmark of a probe-induced shift r0 ! r ðx; yÞ of the cavity resonance: as the resonance wavelength shifts away from the laser wavelength, there is less coupling from the waveguide to the cavity. Less coupling, in turn, reduces the overall losses that the light experiences in the waveguid ...
Low-Loss IR Dielectric Material System for Broadband Dual Range Omnidirectional Reflectivit
... challenging. Typical inorganic low-index materials either have absorption problems at these thermal wavelengths (such as oxides) or are simply not suitable for thin-f ilm applications because of material properties (e.g., salts, which are water soluble and which crystallize). Polymers offer mechanic ...
... challenging. Typical inorganic low-index materials either have absorption problems at these thermal wavelengths (such as oxides) or are simply not suitable for thin-f ilm applications because of material properties (e.g., salts, which are water soluble and which crystallize). Polymers offer mechanic ...
Interferometric measurement of the resonant absorption and
... undergraduate lab experiment using tunable diode lasers, but many others are possible. To fully exploit these laser systems, the instructor needs a range of experiments that can be done without the need for much additional 共usually expensive兲 optical hardware. We describe one such experiment that ex ...
... undergraduate lab experiment using tunable diode lasers, but many others are possible. To fully exploit these laser systems, the instructor needs a range of experiments that can be done without the need for much additional 共usually expensive兲 optical hardware. We describe one such experiment that ex ...
Single-frequency continuous-wave optical parametric oscillator
... PPLN crystal for more than six months without any decrease in efficiency. To demonstrate its reliability and flexibility, we used it to perform Doppler-free spectroscopy of molecular iodine at 580 nm,26 a spectral region where OPOs could offer a more convenient alternative to dye lasers as tunable l ...
... PPLN crystal for more than six months without any decrease in efficiency. To demonstrate its reliability and flexibility, we used it to perform Doppler-free spectroscopy of molecular iodine at 580 nm,26 a spectral region where OPOs could offer a more convenient alternative to dye lasers as tunable l ...
Fiber-optic ring-down spectroscopy using a tunable picosecond gain-switched diode laser Applied Physics B
... loops or multimode fiber loops such as those presented in this article. In these cases, using picosecond pulsed lasers have an advantage over switched cw-lasers. As was pointed out in a landmark paper by Romanini and Lehmann, only light resonant with the longitudinal modes of the cavity can be coupl ...
... loops or multimode fiber loops such as those presented in this article. In these cases, using picosecond pulsed lasers have an advantage over switched cw-lasers. As was pointed out in a landmark paper by Romanini and Lehmann, only light resonant with the longitudinal modes of the cavity can be coupl ...
Investigation of nanoscale structural alterations of cell nucleus as an
... various versions of quantitative phase microscopy and digital holographic microscopy (DHM) [18]. The light interference effect is well known to detect changes in optical path length even at sub-nanometer sensitivity. The second form is based on the analysis of Fourier space (or K-space, the conjugat ...
... various versions of quantitative phase microscopy and digital holographic microscopy (DHM) [18]. The light interference effect is well known to detect changes in optical path length even at sub-nanometer sensitivity. The second form is based on the analysis of Fourier space (or K-space, the conjugat ...
Suppression of optical damage at 532 nm in
... the Gaussian mode is transferred to the –Z direction leaving low intensity patches in the center of the mode. On the other hand, the portion of the distorted beam outside the original Gaussian boundary is actually a speckle pattern. The speckle pattern was observed even when a longer focal length le ...
... the Gaussian mode is transferred to the –Z direction leaving low intensity patches in the center of the mode. On the other hand, the portion of the distorted beam outside the original Gaussian boundary is actually a speckle pattern. The speckle pattern was observed even when a longer focal length le ...
Phonon Laser Action in a Tunable Two-Level System
... Red-supermode pumping [negative inversion in Eq. (4)] will produce damping of the mechanical mode and optomechanical cooling through absorption of mechanical quanta. Despite power limitations imposed by the thermal nonlinearity, evidence of cooling was observed as a decrease in the absolute power le ...
... Red-supermode pumping [negative inversion in Eq. (4)] will produce damping of the mechanical mode and optomechanical cooling through absorption of mechanical quanta. Despite power limitations imposed by the thermal nonlinearity, evidence of cooling was observed as a decrease in the absolute power le ...
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.