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Thin disk laser: power scaling to the kW regime in fundamental
... of the thin-disk laser 16 years ago 1, thin-disk lasers evolved to a common tool for cutting and welding. The highest published output power of an Yb:YAG single disk laser is 5.3 kW in multi-mode operation 2. Nowadays, thin-disk lasers for material processing with an output power up to 16 kW, using ...
... of the thin-disk laser 16 years ago 1, thin-disk lasers evolved to a common tool for cutting and welding. The highest published output power of an Yb:YAG single disk laser is 5.3 kW in multi-mode operation 2. Nowadays, thin-disk lasers for material processing with an output power up to 16 kW, using ...
Light-induced vibration in the hearing organ Linköping University Post Print
... of the local stimulus decreased and a change in the mechanical response occurred (Figure 3a). At the pulse power of 15 mJ/pulse, a rapid initial movement was followed by oscillations that peaked at ,0.4 ms. As the power of the laser pulse decreased, the responses of the basilar membrane were essenti ...
... of the local stimulus decreased and a change in the mechanical response occurred (Figure 3a). At the pulse power of 15 mJ/pulse, a rapid initial movement was followed by oscillations that peaked at ,0.4 ms. As the power of the laser pulse decreased, the responses of the basilar membrane were essenti ...
Week 9 Wed. (Lesson 15) Coherence and Optical Tomography
... • Single atom on 10-8 sec coherent lifetime of atom in an excited state • Much shorter for groups of atoms • For lasers in single mode much longer time ...
... • Single atom on 10-8 sec coherent lifetime of atom in an excited state • Much shorter for groups of atoms • For lasers in single mode much longer time ...
Chapter 2: Propagation of Laser Beams
... Chapter 2 Propagation of Laser Beams Lecture 1 Gaussian laser beams 2.1 Scalar wave equation Lasers are coherent electromagnetic waves. Control of laser beams is a main topic of this course. Laser beams usually have a concentrated profile in the transverse direction, which diverges slowly when propa ...
... Chapter 2 Propagation of Laser Beams Lecture 1 Gaussian laser beams 2.1 Scalar wave equation Lasers are coherent electromagnetic waves. Control of laser beams is a main topic of this course. Laser beams usually have a concentrated profile in the transverse direction, which diverges slowly when propa ...
laser spectroscopy
... The apparatus for the Doppler-free saturated absorption spectroscopy of rubidium is shown in Figure 6. The output beam from the laser is split into three beams, two less intense probe beams and a more intense pump beam, at the thick beamsplitter. The two probe beams pass through the rubidium cell fr ...
... The apparatus for the Doppler-free saturated absorption spectroscopy of rubidium is shown in Figure 6. The output beam from the laser is split into three beams, two less intense probe beams and a more intense pump beam, at the thick beamsplitter. The two probe beams pass through the rubidium cell fr ...
6.1 Characteristics Because VCSELs emit from the top surface of the
... wavelength of the laser; threshold current also increases with temperature as slope efficiency decreases. For DWDM applications, which require very precise operating wavelengths, most of the current laser diode designs need to be cooled to within ± 0.3 °C. As previously explained, the direct modulat ...
... wavelength of the laser; threshold current also increases with temperature as slope efficiency decreases. For DWDM applications, which require very precise operating wavelengths, most of the current laser diode designs need to be cooled to within ± 0.3 °C. As previously explained, the direct modulat ...
Nanosecond laser-induced breakdown in pure and - AS
... studied the temporal structure of the broadband light emitted upon optical breakdown. We find it consists of two pulses, a short one of 16 ns duration, and a long one of several hundred ns. The brightness, spectra, and time profiles of the white light provide clues to the nature of the material modi ...
... studied the temporal structure of the broadband light emitted upon optical breakdown. We find it consists of two pulses, a short one of 16 ns duration, and a long one of several hundred ns. The brightness, spectra, and time profiles of the white light provide clues to the nature of the material modi ...
Optical tweezers using a diode laser
... experiments,5 as well as in automated cell counters and sorting apparatus.6 Further applications await the invention and development of suitable techniques by a cadre of researchers with optical tweezers available to them. To date, most tweezers incorporate Nd:YAG, or an argon-ion laser for the trap ...
... experiments,5 as well as in automated cell counters and sorting apparatus.6 Further applications await the invention and development of suitable techniques by a cadre of researchers with optical tweezers available to them. To date, most tweezers incorporate Nd:YAG, or an argon-ion laser for the trap ...
M. Tech in Optoelectronics and Laser Technology
... Laser Rate Equations : Introduction, The three Leave System, The Four level System, Variation of Laser Power around Threshold, Optimum Output coupling. Laser spiking. Semi classical Theory of Laser : Introduction, Cavity Modes, Polarization of cavity medium : First order & Higher order theory. Unit ...
... Laser Rate Equations : Introduction, The three Leave System, The Four level System, Variation of Laser Power around Threshold, Optimum Output coupling. Laser spiking. Semi classical Theory of Laser : Introduction, Cavity Modes, Polarization of cavity medium : First order & Higher order theory. Unit ...
Peeking and poking at atoms with laser light
... Next we consider a sodium atom in its lower energy level and shine a beam of light of wavelength 600 nm onto it. This may stimulate the atom to jump to its higher energy level by absorbing a photon. Since light carries momentum, the absorption process gives the atom a kick in the propagation directi ...
... Next we consider a sodium atom in its lower energy level and shine a beam of light of wavelength 600 nm onto it. This may stimulate the atom to jump to its higher energy level by absorbing a photon. Since light carries momentum, the absorption process gives the atom a kick in the propagation directi ...
Phase change phenomena during high power laser
... considerable stability with respect to spontaneous nucleation up to 0.89 Tc, with an avalanche-like onset of spontaneous nucleation of the entire high temperature liquid layer at about 0.91 Tc. At a temperature of about 0.91 Tc, homogeneous nucleation, or explosive phase transformation occurs, which ...
... considerable stability with respect to spontaneous nucleation up to 0.89 Tc, with an avalanche-like onset of spontaneous nucleation of the entire high temperature liquid layer at about 0.91 Tc. At a temperature of about 0.91 Tc, homogeneous nucleation, or explosive phase transformation occurs, which ...
The mechanism for continuum polarization in laser induced
... is usually attributed to ion-electron recombination and bremsstrahlung. Various methods have been implemented to suppress the continuum so as to increase the signal/background ratio. In particular, time-gating of the detected signal can reduce the continuum, which generally decays much more rapidly ...
... is usually attributed to ion-electron recombination and bremsstrahlung. Various methods have been implemented to suppress the continuum so as to increase the signal/background ratio. In particular, time-gating of the detected signal can reduce the continuum, which generally decays much more rapidly ...
Dunlap Institute Summer School: Fourier Transform Spectroscopy Lab
... beams of light meet in space, these fields add according to the principle of superposition. At each point in space, the resultant electric and magnetic fields are the vector sum of the fields of the separate beams. If the two beams of light originate from separate sources, there is generally no fixe ...
... beams of light meet in space, these fields add according to the principle of superposition. At each point in space, the resultant electric and magnetic fields are the vector sum of the fields of the separate beams. If the two beams of light originate from separate sources, there is generally no fixe ...
Introductory Quantum Optics Section 2. A laser driven two
... class of experiments became feasible. Testing quantum mechanical laws no longer relied on experiments, which are only indirectly based on quantum mechanical effects and in which the quantum mechanical effects are partially washed out by the coupling of the system to the classical world. Instead one ...
... class of experiments became feasible. Testing quantum mechanical laws no longer relied on experiments, which are only indirectly based on quantum mechanical effects and in which the quantum mechanical effects are partially washed out by the coupling of the system to the classical world. Instead one ...
Laser Bandwidth Measurements in Fiber Data Delivery for Corning
... 10 Gb/s shipments alone are expected to grow at over 250% CAGR from 2002 to 2009.8 Owners of laserbased multimode optical fiber networks demand high reliability and low latency from their infrastructure as a top business priority. The cost of network downtime is extraordinarily high, both from the l ...
... 10 Gb/s shipments alone are expected to grow at over 250% CAGR from 2002 to 2009.8 Owners of laserbased multimode optical fiber networks demand high reliability and low latency from their infrastructure as a top business priority. The cost of network downtime is extraordinarily high, both from the l ...
Frequency comb generation by CW laser injection
... (MLQDL) are interesting for this application as they have a broad gain bandwidth (> 100 nm) required for short pulse generation [7–11]. Further on-chip integration with an optical amplifier, highly non-linear media for spectral broadening and an f–2f interferometer (for carrier envelope offset frequ ...
... (MLQDL) are interesting for this application as they have a broad gain bandwidth (> 100 nm) required for short pulse generation [7–11]. Further on-chip integration with an optical amplifier, highly non-linear media for spectral broadening and an f–2f interferometer (for carrier envelope offset frequ ...
Laser Bleaching of Carbon Nanotubes Suspension in
... 1468 cm-1 correspond to the CH3 bonds, the peaks with the shift of 1748 cm-1 – to the lactones, the peaks with the shifts of 1163 cm-1 and 1059 cm-1 – to the ethers (R‑O‑C‑O‑R). It is difficult to interpret the peaks with the shifts of 816 cm-1, 713 cm-1, 650 cm-1, 541 cm-1. However, one can attribu ...
... 1468 cm-1 correspond to the CH3 bonds, the peaks with the shift of 1748 cm-1 – to the lactones, the peaks with the shifts of 1163 cm-1 and 1059 cm-1 – to the ethers (R‑O‑C‑O‑R). It is difficult to interpret the peaks with the shifts of 816 cm-1, 713 cm-1, 650 cm-1, 541 cm-1. However, one can attribu ...
chapter 6 optical amplifiers
... device may be constructed including perhaps 10 lasers and a coupler all on the same substrate. In this case an SOA could be integrated into the output to overcome some of the coupling losses. ...
... device may be constructed including perhaps 10 lasers and a coupler all on the same substrate. In this case an SOA could be integrated into the output to overcome some of the coupling losses. ...
Bismuth-doped optical fibers: a challenging active medium
... Bi22/Bi222, point defects, Bi0 and others have been examined, but none has been directly confirmed to be the defining factor. These hypotheses have been analyzed in detail in Ref. 14. At the same time, the results of extensive research on the luminescence spectra and lasing performance of crystals d ...
... Bi22/Bi222, point defects, Bi0 and others have been examined, but none has been directly confirmed to be the defining factor. These hypotheses have been analyzed in detail in Ref. 14. At the same time, the results of extensive research on the luminescence spectra and lasing performance of crystals d ...
Production of coherent radiation by atoms and molecules
... random emission of incandescent sources. So have most other types of electromagnetic radiation - infrared, ultraviolet, or gamma rays. The maximum radiation intensities, or specifically the power radiated per unit area per unit solid angle per unit frequency bandwidth, have been controlled by Planck ...
... random emission of incandescent sources. So have most other types of electromagnetic radiation - infrared, ultraviolet, or gamma rays. The maximum radiation intensities, or specifically the power radiated per unit area per unit solid angle per unit frequency bandwidth, have been controlled by Planck ...
Report on T tasks
... should be taken into account in the development of quantum optics experiments and gravitational-wave detectors. We have shown that the interplay between these nonlinear phenomena may lead to self-oscillatory behavior or to bistability, even in absence of time-delay effects in the intracavity field b ...
... should be taken into account in the development of quantum optics experiments and gravitational-wave detectors. We have shown that the interplay between these nonlinear phenomena may lead to self-oscillatory behavior or to bistability, even in absence of time-delay effects in the intracavity field b ...
Raman spectroscopy: Watching a molecule breathe
... Impressively, the GaN polariton laser has a threshold current density of 169 A cm−2 — two orders of magnitude lower than that (13.9 kA cm−2) of its vertical-cavity surfaceemitting laser (VCSEL) counterpart made of the same material10. This is mainly because condensation and lasing with exciton polar ...
... Impressively, the GaN polariton laser has a threshold current density of 169 A cm−2 — two orders of magnitude lower than that (13.9 kA cm−2) of its vertical-cavity surfaceemitting laser (VCSEL) counterpart made of the same material10. This is mainly because condensation and lasing with exciton polar ...
Laser Based Three-Dimensional Measurement of Entire Foot Shape
... Optical three-dimensional shape measurement of live objects is becoming an important developing and research tool because of its non-intrusive nature and high measuring speed. The current methods are reaching truly high speed in one view configuration, but in case of the entire object shape measurem ...
... Optical three-dimensional shape measurement of live objects is becoming an important developing and research tool because of its non-intrusive nature and high measuring speed. The current methods are reaching truly high speed in one view configuration, but in case of the entire object shape measurem ...
A Practical Guide to Optical Trapping
... condenser lenses are set up in a telescope by imaging the field iris in the image plane of the microscope (Fig. 4). This telescope will become important later in the discussion of back-focal plane detection and beam steering. Koehler illumination, achieved by imaging the lamp filament in the plane o ...
... condenser lenses are set up in a telescope by imaging the field iris in the image plane of the microscope (Fig. 4). This telescope will become important later in the discussion of back-focal plane detection and beam steering. Koehler illumination, achieved by imaging the lamp filament in the plane o ...
Optical spectroscopy techniques
... Pump and Probe beam configuration: Doppler-‐broadened shape can be eliminated ...
... Pump and Probe beam configuration: Doppler-‐broadened shape can be eliminated ...
Laser
![](https://commons.wikimedia.org/wiki/Special:FilePath/Military_laser_experiment.jpg?width=300)
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.