Laser Sources for Confocal Microscopy
... the laser medium. This can be another laser, arc lamp or flash lamp, electron beam, proton beam, electrical current, electrical discharge or radio frequency (RF) excitation, etc. The choice of pump source is determined by the optical, thermal, and mechanical properties of the active medium and the w ...
... the laser medium. This can be another laser, arc lamp or flash lamp, electron beam, proton beam, electrical current, electrical discharge or radio frequency (RF) excitation, etc. The choice of pump source is determined by the optical, thermal, and mechanical properties of the active medium and the w ...
The Temperature Dependence Of The Gain In
... links has been a major force behind research into solid ...
... links has been a major force behind research into solid ...
Get PDF - OSA Publishing
... an incident wave and its ref lection from the mirror. These waves are ref lected by the grating induced by the former strong counterpropagating pair of waves, if their frequency is inside the bandwidth of the grating (the Bragg zone). The ref lection of each of the weak waves interferes with the cor ...
... an incident wave and its ref lection from the mirror. These waves are ref lected by the grating induced by the former strong counterpropagating pair of waves, if their frequency is inside the bandwidth of the grating (the Bragg zone). The ref lection of each of the weak waves interferes with the cor ...
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... Laser tweezers [1] have provided an unprecedented level of control over fluid-borne particles, leading to experiments that have probed the intricate stepping of molecular motors [2], interparticle interactions [3], and colloidal assembly [4]. Using laser tweezers to manipulate non-spherical colloids ...
... Laser tweezers [1] have provided an unprecedented level of control over fluid-borne particles, leading to experiments that have probed the intricate stepping of molecular motors [2], interparticle interactions [3], and colloidal assembly [4]. Using laser tweezers to manipulate non-spherical colloids ...
Heriot-Watt University Multi-millijoule few-cycle mid
... of the plasma anomalous dispersion13–16, and to anomalouslydispersive bulk solids17,18. For solid media, the energy of the selfcompressed pulses in the femtosecond range is limited to a few microjoules because the critical power of self-focusing, Pcr, is at the MW level. For millijoule pulses, relev ...
... of the plasma anomalous dispersion13–16, and to anomalouslydispersive bulk solids17,18. For solid media, the energy of the selfcompressed pulses in the femtosecond range is limited to a few microjoules because the critical power of self-focusing, Pcr, is at the MW level. For millijoule pulses, relev ...
PDF
... other topologically similar but more easily accessible systems, such as LCs and laser beams1–5,8,14. A nematic LC is typically comprised of rod-like molecules that spontaneously orient themselves along a common direction, described by the so-called director n with nonpolar symmetry (n:{n), which is ...
... other topologically similar but more easily accessible systems, such as LCs and laser beams1–5,8,14. A nematic LC is typically comprised of rod-like molecules that spontaneously orient themselves along a common direction, described by the so-called director n with nonpolar symmetry (n:{n), which is ...
Compact Optical Fiber Amplifier
... is designed so that insertion loss is lowest for the C-band, the pumping and signal light can pass the isolator under the condition that losses at these wavelengths are only 0.2 or 0.3 dB larger than that of the C-band. For this reason, WDM couplers in front of and behind the middle isolator, which ...
... is designed so that insertion loss is lowest for the C-band, the pumping and signal light can pass the isolator under the condition that losses at these wavelengths are only 0.2 or 0.3 dB larger than that of the C-band. For this reason, WDM couplers in front of and behind the middle isolator, which ...
Blooming Thermal- Laboratory Experiments Bernadette Johnson
... adaptive optics hardware. We did intend, however, for the 69-channel experiments to provide early data for code verification well before the completion of the larger 24 I-channel system. The increased number of actuators in the 241channel system permitted compensation at spatial frequencies approxim ...
... adaptive optics hardware. We did intend, however, for the 69-channel experiments to provide early data for code verification well before the completion of the larger 24 I-channel system. The increased number of actuators in the 241channel system permitted compensation at spatial frequencies approxim ...
Direct measurement of terahertz wavefront pulses using 2D electro
... Wavefront characterization of terahertz (THz) pulses is essential to optimize far-field intensity distribution or spot focalization, as well as increase the peak power of intense terahertz sources. In the visible spectral region, Hartmann masks, invented a century ago, are used to perform optical me ...
... Wavefront characterization of terahertz (THz) pulses is essential to optimize far-field intensity distribution or spot focalization, as well as increase the peak power of intense terahertz sources. In the visible spectral region, Hartmann masks, invented a century ago, are used to perform optical me ...
S.72-227 Digital Communication Systems
... For raised cosine shaped pulses thus over 20Mb/signaling rate can be achieved ...
... For raised cosine shaped pulses thus over 20Mb/signaling rate can be achieved ...
Exp. 71 - Caltech
... Fabry-Perot cavities (also called Fabry-Perot etalons) are ubiquitous elements in optical physics, and they are used for such applications as sensitive wavelength discriminators, as stable frequency references, and for building up large field intensities with low input powers. Also, lasers are all ma ...
... Fabry-Perot cavities (also called Fabry-Perot etalons) are ubiquitous elements in optical physics, and they are used for such applications as sensitive wavelength discriminators, as stable frequency references, and for building up large field intensities with low input powers. Also, lasers are all ma ...
Fluorescence Microscopy
... light is scattered less, two-photon excitation of thick tissues is best coupled with an indicator that fluoresces and emits photons in the red region. In conventional imaging, spatial resolution is dependent on the wavelength of the excitation light and the microscope optics. In practice, with one-ph ...
... light is scattered less, two-photon excitation of thick tissues is best coupled with an indicator that fluoresces and emits photons in the red region. In conventional imaging, spatial resolution is dependent on the wavelength of the excitation light and the microscope optics. In practice, with one-ph ...
Paper Title
... 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-bandwidth sources. Alternatively, scanning exciting frequency can be used in spectrometry applications. Such wavegu ...
... 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-bandwidth sources. Alternatively, scanning exciting frequency can be used in spectrometry applications. Such wavegu ...
The optics and performance of dual-focus fluorescence correlation
... collection efficiency function (CEF). For rapidly rotating molecules with rotational diffusion times much faster than their fluorescence decay time, the MDF is well approximated by the simple product of the excitation light intensity distribution with the CEF, and we will limit our considerations t ...
... collection efficiency function (CEF). For rapidly rotating molecules with rotational diffusion times much faster than their fluorescence decay time, the MDF is well approximated by the simple product of the excitation light intensity distribution with the CEF, and we will limit our considerations t ...
Study of the temporal and spatial dynamics of
... very short time range (fraction of a nanosecond), thus decreasing the number of electrons that can migrate outside the plasma region initially formed near the focal plane. On the other side, transport of ionizing radiation has been calculated to occur at an average speed of 3 X 104 M/s (Ref. 20) in ...
... very short time range (fraction of a nanosecond), thus decreasing the number of electrons that can migrate outside the plasma region initially formed near the focal plane. On the other side, transport of ionizing radiation has been calculated to occur at an average speed of 3 X 104 M/s (Ref. 20) in ...
Frequency domain optical parametric amplification - few
... batch to ensure their same relative optical thickness as is discussed in the Methods section. After the FP, an identical mirror-grating arrangement performs a second Fourier transformation to recover the time domain pulses with the same pulse duration as at the input. Finally, we draw attention to t ...
... batch to ensure their same relative optical thickness as is discussed in the Methods section. After the FP, an identical mirror-grating arrangement performs a second Fourier transformation to recover the time domain pulses with the same pulse duration as at the input. Finally, we draw attention to t ...
The Balance Detector
... The response near zero of balance detectors 1 through 5 were measured, and the results are shown in Figure 2. The error bars on the figure represent the in-quadraturecombined range of the fluctuations of the two readings on the power meter, as judged by the human making the measurements. While the r ...
... The response near zero of balance detectors 1 through 5 were measured, and the results are shown in Figure 2. The error bars on the figure represent the in-quadraturecombined range of the fluctuations of the two readings on the power meter, as judged by the human making the measurements. While the r ...
Fabry-Perot Interferometer
... For the characterization of the resonator the distance of the interference peaks as well as the FWHM of the peaks has to be measured (see Fig. 10). This is done by using the CURSER function of the oscilloscope. For reference, save the image of the oscilloscope screen showing the measurement results ...
... For the characterization of the resonator the distance of the interference peaks as well as the FWHM of the peaks has to be measured (see Fig. 10). This is done by using the CURSER function of the oscilloscope. For reference, save the image of the oscilloscope screen showing the measurement results ...
Nanoscale focusing of atoms with a pulsed standing wave
... For the comparison of the measured beam profiles with theoretical calculations we simulate a thermal atomic beam with transverse velocity distribution and light field parameters as in our experiment. The trajectories of the atoms traversing the pulsed standing wave are calculated using the expressio ...
... For the comparison of the measured beam profiles with theoretical calculations we simulate a thermal atomic beam with transverse velocity distribution and light field parameters as in our experiment. The trajectories of the atoms traversing the pulsed standing wave are calculated using the expressio ...
Calibration of Optical Tweezers
... laser beam. The light is then reflected off a dichroic mirror and passed through a microscope (100X, NA=1.3). The focused beam is projected onto a microscope slide that contains silica microspheres in deionized water. A white light source is used to illuminate the sample and a CCD camera on the oppo ...
... laser beam. The light is then reflected off a dichroic mirror and passed through a microscope (100X, NA=1.3). The focused beam is projected onto a microscope slide that contains silica microspheres in deionized water. A white light source is used to illuminate the sample and a CCD camera on the oppo ...
Single-shot measurement of a 52 fs pulse
... pulse is not really symmetric, the temporal chirped pulse shape is asymmetric. Then the correlation function of an asymmetrically chirped pulse and a symmetric unchirped pulse can show some asymmetry. Figure 4 shows an averaging of fifty consecutive pulses giving an average FWHM of 70 fs. From shot ...
... pulse is not really symmetric, the temporal chirped pulse shape is asymmetric. Then the correlation function of an asymmetrically chirped pulse and a symmetric unchirped pulse can show some asymmetry. Figure 4 shows an averaging of fifty consecutive pulses giving an average FWHM of 70 fs. From shot ...
Absorption Measurements in Microfluidic Devices using Ring-down Spectroscopy
... Here, we present an alternative method that is based on optical absorption, or more specifically on the ring-down time of an optical signal in a cavity or loop made of waveguide material. This optical decay constant changes as small liquid samples containing absorbing species are introduced into a f ...
... Here, we present an alternative method that is based on optical absorption, or more specifically on the ring-down time of an optical signal in a cavity or loop made of waveguide material. This optical decay constant changes as small liquid samples containing absorbing species are introduced into a f ...
Accurate determination of the rotational constants of ultracold
... Recently, there have been some extensive studies in the production and manipulation of the ultracold molecules, which have shown significantly promising applications in areas ranging from precision mmeasurement to quantum information storage and processing [1–3]. Photoassociation (PA) of the ultraco ...
... Recently, there have been some extensive studies in the production and manipulation of the ultracold molecules, which have shown significantly promising applications in areas ranging from precision mmeasurement to quantum information storage and processing [1–3]. Photoassociation (PA) of the ultraco ...
Observation of two-photon emission from semiconductors
... close intermediate states, making the semiconductor two-photon process more efficient. Furthermore, using intraband transitions as part of the two-photon second-order calculations results in a wave-vector (k-) dependence of the matrix element, unlike for the interband transitions for parabolic bands ...
... close intermediate states, making the semiconductor two-photon process more efficient. Furthermore, using intraband transitions as part of the two-photon second-order calculations results in a wave-vector (k-) dependence of the matrix element, unlike for the interband transitions for parabolic bands ...
EXPERIMENTS USING A HELIUM-NEON LASER
... 1. Instruct students not to look into the laser or stare at bright mirror-like reflections of the beam. 2. Remove all bright mirror-like objects from the work area, including rings, watches, metal bands and tools. Beam reflections can be nearly as intense as the original beam. 3. Block off the beam ...
... 1. Instruct students not to look into the laser or stare at bright mirror-like reflections of the beam. 2. Remove all bright mirror-like objects from the work area, including rings, watches, metal bands and tools. Beam reflections can be nearly as intense as the original beam. 3. Block off the beam ...
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term ""laser"" originated as an acronym for ""light amplification by stimulated emission of radiation"". The first laser was built in 1960 by Theodore H. Maiman at Hughes Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond.Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.