Laser tweezers and their applications
... that light has and the pressure that this allows it to exert, as it pushes the tail of a comet away from the sun. Now with the assistance of gradient forces, this "pushing" quality of light (and other radiation) has been extended to pulling and twisting of invisible objects in just the past twenty-f ...
... that light has and the pressure that this allows it to exert, as it pushes the tail of a comet away from the sun. Now with the assistance of gradient forces, this "pushing" quality of light (and other radiation) has been extended to pulling and twisting of invisible objects in just the past twenty-f ...
Get PDF - OSA Publishing
... m). Such resonantly-enhanced frequency conversion is well known from low-order frequency conversion processes, driven by lasers of moderate intensities. As a simple example, we note resonantly-enhanced four-wave mixing in atomic gases. Here, a first laser pulse drives a twophoton transition, which s ...
... m). Such resonantly-enhanced frequency conversion is well known from low-order frequency conversion processes, driven by lasers of moderate intensities. As a simple example, we note resonantly-enhanced four-wave mixing in atomic gases. Here, a first laser pulse drives a twophoton transition, which s ...
Powerpoint file - Department of Physics
... In most everyday matter, the de Broglie wavelength is much shorter than the distance separating the atoms. In this case, the wave nature of atoms cannot be noticed, and they behave as particles. The wave nature of atoms become noticeable when the de Broglie wavelength is roughly the same as the at ...
... In most everyday matter, the de Broglie wavelength is much shorter than the distance separating the atoms. In this case, the wave nature of atoms cannot be noticed, and they behave as particles. The wave nature of atoms become noticeable when the de Broglie wavelength is roughly the same as the at ...
Laser intensity induced transparency in atom
... the saturation intensity. This means that the value of C keeps invariable as the PA laser intensity reaches the saturation intensity. In order to avoid the influence from the variation of C, we define the resonant transitional frequency where PA laser intensity is *300 W/cm2 as the original atom-mol ...
... the saturation intensity. This means that the value of C keeps invariable as the PA laser intensity reaches the saturation intensity. In order to avoid the influence from the variation of C, we define the resonant transitional frequency where PA laser intensity is *300 W/cm2 as the original atom-mol ...
Conference title, upper and lower case, bolded, 18 point type
... Fig. S3. Sketch of the experimental setup. The laser beam from a fiber coupled laser is collimated by means of a fiber collimator (Thorlabs RC04APC-P01) with a beam diameter of about 4 mm. The collimated beam then passes through a Glan-Thompson polarizer (Thorlabs GTH10) and a quarter waveplate (ach ...
... Fig. S3. Sketch of the experimental setup. The laser beam from a fiber coupled laser is collimated by means of a fiber collimator (Thorlabs RC04APC-P01) with a beam diameter of about 4 mm. The collimated beam then passes through a Glan-Thompson polarizer (Thorlabs GTH10) and a quarter waveplate (ach ...
Time-of-flight optical ranging system based on time
... system and was designed to permit maximum flexibility in the investigation of several different optical configurations. The optical axis defined by the V grooves lies 10 mm above the surface of the base plate and permits movement of the optical components only by rotation about or translation along ...
... system and was designed to permit maximum flexibility in the investigation of several different optical configurations. The optical axis defined by the V grooves lies 10 mm above the surface of the base plate and permits movement of the optical components only by rotation about or translation along ...
Optical laser beam scanner lens relay system
... A lens-coupled system is inevitably chromatic to some extent and it is hard to ensure field flatness with standard, i.e. commonly available lenses. Nevertheless, a very good performance can be obtained with a little bit of care in the design. Even a very simple design using achromats is adequate, al ...
... A lens-coupled system is inevitably chromatic to some extent and it is hard to ensure field flatness with standard, i.e. commonly available lenses. Nevertheless, a very good performance can be obtained with a little bit of care in the design. Even a very simple design using achromats is adequate, al ...
Theory of relativistic harmonic generation
... tensity of the order of 2 x l O I 7 Wlcm', the electron is accelerated to relavistic velocities in a single optical period, and thus the excursion of the electron from its equilibrium poistion occur over a distance of the order of h. Under such conditions, the radiation emitted by the electron canno ...
... tensity of the order of 2 x l O I 7 Wlcm', the electron is accelerated to relavistic velocities in a single optical period, and thus the excursion of the electron from its equilibrium poistion occur over a distance of the order of h. Under such conditions, the radiation emitted by the electron canno ...
arXiv:quant-ph/9710044 v1 20 Oct 1997 - UQ eSpace
... Despite these heroic experimental achievements, the quantum motion of a single trapped ion is obviously limited by sources of decoherence. Decoherence arises from random and unknown perturbations of the Hamiltonian. If these perturbations cannot be followed exactly, experiments must average over the ...
... Despite these heroic experimental achievements, the quantum motion of a single trapped ion is obviously limited by sources of decoherence. Decoherence arises from random and unknown perturbations of the Hamiltonian. If these perturbations cannot be followed exactly, experiments must average over the ...
Laser multipass system with interior cell configuration
... spectrograph of a hundred micrometers wide and a few millimeters long. Therefore, the essential requirement for multipass configuration is that the excitation light source (laser) beam traverses the same small scattering region repeatedly. This is why the relatively large multipass cells developed f ...
... spectrograph of a hundred micrometers wide and a few millimeters long. Therefore, the essential requirement for multipass configuration is that the excitation light source (laser) beam traverses the same small scattering region repeatedly. This is why the relatively large multipass cells developed f ...
Rotational Raman Spectra of Diatomic Molecules
... power draw over 1 kW, which translates into a large amount of heat which must be dissipated. ...
... power draw over 1 kW, which translates into a large amount of heat which must be dissipated. ...
... Geometrical Optics The light source for this experiment is a low-power helium-neon laser with a wavelength of 632.8 nm. Never look directly at a laser beam nor permit anyone else to do so! Exposure to the direct or reflected beam for more than a few seconds will cause serious eye damage. Do not pick ...
Research Projects in Photonics
... conduction and cause cross-talk, thus jeopardizing the ability to improve the circuit speed expected from miniaturization. One way to mitigate this “interconnect problem” is to move from electrical to optical interconnects, which does not suffer from the above mentioned parasitics. For global interc ...
... conduction and cause cross-talk, thus jeopardizing the ability to improve the circuit speed expected from miniaturization. One way to mitigate this “interconnect problem” is to move from electrical to optical interconnects, which does not suffer from the above mentioned parasitics. For global interc ...
NPM-O22 Influences of different low level laser power at
... generated by the ASAP program. Computer modeling is the primary tool to identify optimal laser settings. It was used to deliver the light and propagation multi laser power for two types of skin, dark and light. The power flux distribution and absorption were demonstrated within 0.015 to 0.1 mm in ep ...
... generated by the ASAP program. Computer modeling is the primary tool to identify optimal laser settings. It was used to deliver the light and propagation multi laser power for two types of skin, dark and light. The power flux distribution and absorption were demonstrated within 0.015 to 0.1 mm in ep ...
Single Emitter Detection with Fluorescence and Extinction
... q .. displacement of electron Γ‘ .. damping by non-radiative channels (≈ 0) E0 .. electric field amplitude at place of oscillator ε .. unit vector along direction of driving field E τ .. characteristic time of damping by radiation reaction gives stationary state solution of q: ...
... q .. displacement of electron Γ‘ .. damping by non-radiative channels (≈ 0) E0 .. electric field amplitude at place of oscillator ε .. unit vector along direction of driving field E τ .. characteristic time of damping by radiation reaction gives stationary state solution of q: ...
Coherent Optical Information Systems
... fiber scramble the information. However, in principle, we can recover the original image from the output measurement using phase conjugation if the illumination is coherent (2). If, however, the input illumination is completely incoherent, then the information about the input image is lost. In free ...
... fiber scramble the information. However, in principle, we can recover the original image from the output measurement using phase conjugation if the illumination is coherent (2). If, however, the input illumination is completely incoherent, then the information about the input image is lost. In free ...
microscopy DAMOP poster - Yavuz Lab!
... Over the last two decades, nanoscale optical microscopy has been the subject of intense research [1]. While it is well known that the Abbe Limit physically constrains how well a beam of light can resolve a sample, several techniques are being investigated and employed which work around this limit: J ...
... Over the last two decades, nanoscale optical microscopy has been the subject of intense research [1]. While it is well known that the Abbe Limit physically constrains how well a beam of light can resolve a sample, several techniques are being investigated and employed which work around this limit: J ...
Real Beam Propagation
... inadequate because, for example, the output of a laser can contain up to 50% higher-order modes and still be considered TEM00. ...
... inadequate because, for example, the output of a laser can contain up to 50% higher-order modes and still be considered TEM00. ...
Coherent Laser Beam Addition: Application of Binary-Optics Technology An
... spread. The high radiance is a consequence of the spatial coherence across the laser beam (phases of two spatially distinct points on the wavefront are locked together), as well as the phase uniformity across the wavefront. In contrast, an array of mutually incoherent lasers behaves more like the in ...
... spread. The high radiance is a consequence of the spatial coherence across the laser beam (phases of two spatially distinct points on the wavefront are locked together), as well as the phase uniformity across the wavefront. In contrast, an array of mutually incoherent lasers behaves more like the in ...
Experimental Competition
... Start the liquid rotating, and increase the speed of rotation gradually up to the maximum attainable speed while watching the screen. As increases you might observe different frequency ranges over which the properties of the “image” are drastically different. To describe these observations complet ...
... Start the liquid rotating, and increase the speed of rotation gradually up to the maximum attainable speed while watching the screen. As increases you might observe different frequency ranges over which the properties of the “image” are drastically different. To describe these observations complet ...
Laser ranging: a critical review of usual techniques
... pling along the third dimension 共Z axis兲 often requires image pattern centroid location and interpolation. This is where coherence shows its limitation. Indeed, because of the coherent nature of the laser projection, the imaged laser spot on the photodetector共s兲 is corrupted with speckle noise. Here ...
... pling along the third dimension 共Z axis兲 often requires image pattern centroid location and interpolation. This is where coherence shows its limitation. Indeed, because of the coherent nature of the laser projection, the imaged laser spot on the photodetector共s兲 is corrupted with speckle noise. Here ...
Wavelength-tuning interferometry of intraocular distances
... terference fringes that pass a fixed point in an interferogram while the wavelength of a pulse-modeoperated laser diode was changed.19 However, this fringe-counting method does not exploit the full information content of the time-domain signal and can therefore only be used if a single distance is ...
... terference fringes that pass a fixed point in an interferogram while the wavelength of a pulse-modeoperated laser diode was changed.19 However, this fringe-counting method does not exploit the full information content of the time-domain signal and can therefore only be used if a single distance is ...
interferometer_2014
... the number of precision mechanical mounts to a minimum; keep the spots small on the beam splitter and mirrors and then blow the beam up for viewing at the end. We use a laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end ...
... the number of precision mechanical mounts to a minimum; keep the spots small on the beam splitter and mirrors and then blow the beam up for viewing at the end. We use a laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end ...
Dark Resonances From Optical Pumping to Cold Atoms and
... Note finally that the dark resonance exists only if the two laser fields are coherent. If their phases changes in a random way, the phase difference between the two absorption amplitudes appearing in Eq. (5) changes also in a random way so that the destructive interference cannot hold for all times. ...
... Note finally that the dark resonance exists only if the two laser fields are coherent. If their phases changes in a random way, the phase difference between the two absorption amplitudes appearing in Eq. (5) changes also in a random way so that the destructive interference cannot hold for all times. ...
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.