Novel technique for thermal lens measurement in commonly used
... A good spatial mode profile with specified waist size and position is essential for high precision applications such as medicine, laser machining or laser interferometry. Furthermore, these applications often require high power laser sources. However increasing the laser power potentially distorts t ...
... A good spatial mode profile with specified waist size and position is essential for high precision applications such as medicine, laser machining or laser interferometry. Furthermore, these applications often require high power laser sources. However increasing the laser power potentially distorts t ...
Three-dimensional superresolution technology applied to
... superresoloved phase plates can be successfully applied to femtosecond laser systems for microfabrication, data memory and et al. Keywords: superresolution, superresolved phase plate, laser microfabrication, optimization algorithm, compression ratio DOI: 10.2961/jlmn.2006.03.0025 ...
... superresoloved phase plates can be successfully applied to femtosecond laser systems for microfabrication, data memory and et al. Keywords: superresolution, superresolved phase plate, laser microfabrication, optimization algorithm, compression ratio DOI: 10.2961/jlmn.2006.03.0025 ...
OM1 - Faculty of Engineering
... reflected by the beam splitter. Thus, the two beams are brought together to form interference fringes. Since one beam passes through BS 3 times, a compensating plate C is required for another beam so that both beams pass through equal thickness of glass. The inclusion of a compensating plate negates ...
... reflected by the beam splitter. Thus, the two beams are brought together to form interference fringes. Since one beam passes through BS 3 times, a compensating plate C is required for another beam so that both beams pass through equal thickness of glass. The inclusion of a compensating plate negates ...
Paper
... (aspect ratio about ten) the probability for emission of a subsequent photon into the same mode as a previous photon is highest along the long axis of the condensate, here Ω ∼ λ2 /A is largest, since the geometrical projection of the condensate along this direction leads to the smallest cross-sectio ...
... (aspect ratio about ten) the probability for emission of a subsequent photon into the same mode as a previous photon is highest along the long axis of the condensate, here Ω ∼ λ2 /A is largest, since the geometrical projection of the condensate along this direction leads to the smallest cross-sectio ...
Analysis of Strained Al0.15In0.22Ga0.63As/GaAs Graded Index
... conduction band discontinuity. Addition of Al increases the band gap energy resulting in the reduced emission wavelength. The resulting quaternary strained QW lasers can operate over a very wide range of wavelengths depending on In and Al compositions [14]. Because of its wide band gap, pure GaAs is ...
... conduction band discontinuity. Addition of Al increases the band gap energy resulting in the reduced emission wavelength. The resulting quaternary strained QW lasers can operate over a very wide range of wavelengths depending on In and Al compositions [14]. Because of its wide band gap, pure GaAs is ...
Wolfgang Ketterle Department of Physics Superfluidity and Coherence in Bose-Einstein Condensates
... We have observed the formation of highly-ordered vortex lattices in a rotating Bosecondensed gas [4]. They were produced by rotating the condensate around its long axis using the optical dipole force exerted by a blue-detuned laser. A striking feature of the observed lattices is the extreme regulari ...
... We have observed the formation of highly-ordered vortex lattices in a rotating Bosecondensed gas [4]. They were produced by rotating the condensate around its long axis using the optical dipole force exerted by a blue-detuned laser. A striking feature of the observed lattices is the extreme regulari ...
experiments using a helium-neon laser
... 5. Never use magnifiers such as binoculars or telescopes to look at the beam as it travels or when it strikes a surface 6. Never allow unauthorized people to handle lasers; store them in a safe place away from unauthorized users. 7. Lasers are not toys, use them only for educational purposes. 8. Nev ...
... 5. Never use magnifiers such as binoculars or telescopes to look at the beam as it travels or when it strikes a surface 6. Never allow unauthorized people to handle lasers; store them in a safe place away from unauthorized users. 7. Lasers are not toys, use them only for educational purposes. 8. Nev ...
Rate equation model of bulk optical damage of silica - AS
... damage threshold fluence was 25.4 ± 1.3 J/cm2. This is corrected for self focusing which reduces the focal waist area by 27%. 4. Pulse duration scaling of damage threshold in bulk fused silica The literature on optical damage in transparent material often claims that that the damage threshold fluenc ...
... damage threshold fluence was 25.4 ± 1.3 J/cm2. This is corrected for self focusing which reduces the focal waist area by 27%. 4. Pulse duration scaling of damage threshold in bulk fused silica The literature on optical damage in transparent material often claims that that the damage threshold fluenc ...
Non-thermal laser-induced desorption of metal atoms with bimodal
... semiconductors [2, 3], metals [4—17] or insulators [18]. Even though a large number of experimental and theoretical investigations on non-thermal desorption can be found in the literature, the present understanding of such light-induced reactions is still rather limited. In order to ...
... semiconductors [2, 3], metals [4—17] or insulators [18]. Even though a large number of experimental and theoretical investigations on non-thermal desorption can be found in the literature, the present understanding of such light-induced reactions is still rather limited. In order to ...
PASSION FOR PRECISION
... over the past 50 years [1], as shown by the dashed line in Fig. 1, but the potential for further improvements seems almost exhausted. However, our optical frequency counting techniques make it now feasible to develop optical atomic clocks, based on sharp optical resonances in laser-cooled trapped io ...
... over the past 50 years [1], as shown by the dashed line in Fig. 1, but the potential for further improvements seems almost exhausted. However, our optical frequency counting techniques make it now feasible to develop optical atomic clocks, based on sharp optical resonances in laser-cooled trapped io ...
vapor liquid - UPB Sci Bull
... thickness and the material parameters. We also found the saturation intensity of the laser beam producing the planar alignment all over the cell, in terms of nematic liquid crystal properties, surface and cell parameters. ...
... thickness and the material parameters. We also found the saturation intensity of the laser beam producing the planar alignment all over the cell, in terms of nematic liquid crystal properties, surface and cell parameters. ...
Other photon-lithographies
... o Absence of out-of-focus absorption. o The infrared excitation light suffers less scattering. ...
... o Absence of out-of-focus absorption. o The infrared excitation light suffers less scattering. ...
Construction Of Multiple-beam Optical Traps
... to time-share the laser beam among a set of positions in the specimen plane [18], by rapidly scanning its position back and forth among these (analogous to the way separate traces are created in a multiple-beam oscilloscope). If the light is scanned quickly enough, the rapidly “blinking” individual ...
... to time-share the laser beam among a set of positions in the specimen plane [18], by rapidly scanning its position back and forth among these (analogous to the way separate traces are created in a multiple-beam oscilloscope). If the light is scanned quickly enough, the rapidly “blinking” individual ...
Book of abstracts and workshop programme
... protons, neutrons, or electrons, be they normal matter or antimatter [1]. The quantum weak equivalence principle (QWEP) project will test the equivalence principle by matter-wave interferometry, making use of a microgravity environment to attain high sensitivity. We will discuss theoretical and expe ...
... protons, neutrons, or electrons, be they normal matter or antimatter [1]. The quantum weak equivalence principle (QWEP) project will test the equivalence principle by matter-wave interferometry, making use of a microgravity environment to attain high sensitivity. We will discuss theoretical and expe ...
Document
... – Spontaneous emission (SE) is not polarized or coherent – Like any photon, SE stimulates emission of other photons – With no input signal, eventually all optical energy is consumed into amplified spontaneous emission – Input signal(s) consume metastable electrons much less ASE ...
... – Spontaneous emission (SE) is not polarized or coherent – Like any photon, SE stimulates emission of other photons – With no input signal, eventually all optical energy is consumed into amplified spontaneous emission – Input signal(s) consume metastable electrons much less ASE ...
Quantum manipulation on the Barium quadrupolar transition
... techniques. In addition to that, single ions are also employed in experiments performing high precision spectroscopy or testing fundamental quantum electrodynamics effects. Their results allow a better understanding of the properties of quantum systems and can therefore lead to new applications. For ...
... techniques. In addition to that, single ions are also employed in experiments performing high precision spectroscopy or testing fundamental quantum electrodynamics effects. Their results allow a better understanding of the properties of quantum systems and can therefore lead to new applications. For ...
The Construction and Characterization of a Magneto
... atomic sample, on the other hand, is a superior form of storage medium due both to its weak internal and external interactions (which leads to increased coherence lifetime) and its narrow velocity distribution (which means nearly all the atoms in the sample are in resonance with the light field). Al ...
... atomic sample, on the other hand, is a superior form of storage medium due both to its weak internal and external interactions (which leads to increased coherence lifetime) and its narrow velocity distribution (which means nearly all the atoms in the sample are in resonance with the light field). Al ...
Ultrasensitive absorption spectroscopy with a high
... comparable to the intrinsic cavity loss, the gain rolls off as the absorption begins to limit the effective number of passes rather than the losses at the mirrors. The above analysis shows that the cavity provides tremendous signal gains even if the cavity resonances are completely suppressed. In fa ...
... comparable to the intrinsic cavity loss, the gain rolls off as the absorption begins to limit the effective number of passes rather than the losses at the mirrors. The above analysis shows that the cavity provides tremendous signal gains even if the cavity resonances are completely suppressed. In fa ...
Optical Breakdown in Liquid Suspensions and Its Analytical
... for probing the cuvette in a direction perpendicular to the first laser beam. The probing laser was fired at controllable time delay after the first laser pulse, such that time-resolved information can be achieved. An argon-ion laser was used for alignment and adjustment of the optical components. 3 ...
... for probing the cuvette in a direction perpendicular to the first laser beam. The probing laser was fired at controllable time delay after the first laser pulse, such that time-resolved information can be achieved. An argon-ion laser was used for alignment and adjustment of the optical components. 3 ...
Saturation
... Since the absorption profile of a homogeneously broadened line is Lorentzian, the induced absorption probability is B12 ( ) L( 0 ) And the saturation parameter is B12 ( ) S L( 0 ) S ( 0 ) ...
... Since the absorption profile of a homogeneously broadened line is Lorentzian, the induced absorption probability is B12 ( ) L( 0 ) And the saturation parameter is B12 ( ) S L( 0 ) S ( 0 ) ...
EPH7052 Optical Comm Chapter05 Amplifiers
... • able to operate at the 1300nm and 1550nm wavelengths (simultaneously) • wide bandwidth, up to 100nm • can be readily integrated along with other semiconductors and photonic devices into one monolithic chip called an optoelectronic integrated circuit (OEIC) ...
... • able to operate at the 1300nm and 1550nm wavelengths (simultaneously) • wide bandwidth, up to 100nm • can be readily integrated along with other semiconductors and photonic devices into one monolithic chip called an optoelectronic integrated circuit (OEIC) ...
lab 7 Wave Optics
... pattern, and you would like to try a diffraction technique with viruses. Two issues occur to you. The first issue is, of course, how to determine the size of an object from its diffraction pattern. The second issue has to do with the form in which the viruses will be studied. Your group can isolate ...
... pattern, and you would like to try a diffraction technique with viruses. Two issues occur to you. The first issue is, of course, how to determine the size of an object from its diffraction pattern. The second issue has to do with the form in which the viruses will be studied. Your group can isolate ...
Optical fibres
... The no. of atoms in the ground state will be more than that the atom in the excited state and it is called ideal state of atom. The he reverse of this a state of achieving more no. of atoms in the higher energy level than that of the lower energy is called population inversion. 2. What are coherent ...
... The no. of atoms in the ground state will be more than that the atom in the excited state and it is called ideal state of atom. The he reverse of this a state of achieving more no. of atoms in the higher energy level than that of the lower energy is called population inversion. 2. What are coherent ...
Variable xy-UV beam expander for high-power laser
... of elements used. In addition, we desire to use standard catalog elements to avoid fabricating custom cylinders, and they must be made of UV grade fused silica for high transmission at 355 nm. Fortunately, the CVI Melles Griot catalog offers a large selection of standard plano-convex and plano-conca ...
... of elements used. In addition, we desire to use standard catalog elements to avoid fabricating custom cylinders, and they must be made of UV grade fused silica for high transmission at 355 nm. Fortunately, the CVI Melles Griot catalog offers a large selection of standard plano-convex and plano-conca ...
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.