![- Welcome to UC Santa Barbara](http://s1.studyres.com/store/data/008534971_1-71302b1dfe04701a5b3e6a34e25b2069-300x300.png)
- Welcome to UC Santa Barbara
... • Z-scan works if the thickness of the sample is much smaller than the beam’s waist length. • Data processing apparatus relies on the Gaussian profile of the beam. Very accurate characterization of the pump beam is required. • Requires high energy pump pulses as well as high concentration of TPA abs ...
... • Z-scan works if the thickness of the sample is much smaller than the beam’s waist length. • Data processing apparatus relies on the Gaussian profile of the beam. Very accurate characterization of the pump beam is required. • Requires high energy pump pulses as well as high concentration of TPA abs ...
Laser oscillation in proton implanted Nd:YAG waveguides
... Figure 2: Spontaneous emission of the Nd3+ ions in waveguide configuration after pumping at 816 nm. The inset shows the laser output spectrum using 120 mW pump power. ...
... Figure 2: Spontaneous emission of the Nd3+ ions in waveguide configuration after pumping at 816 nm. The inset shows the laser output spectrum using 120 mW pump power. ...
Tunable THz frequency difference from a diodepumped
... adequate phase matching can also be used [3,4] in difference frequency mixing, mainly in the nanosecond regime basically provided by Q-switch Nd:YAG lasers pumping ...
... adequate phase matching can also be used [3,4] in difference frequency mixing, mainly in the nanosecond regime basically provided by Q-switch Nd:YAG lasers pumping ...
r 5 fs hinner ljuset färdas 1
... The beam is split up into two equally strong pulses, which are delayed by propagating different paths in the two arms of the autocorrelator. Then they are spatially overlapped in the crystal. By moving one of the mirrors in the autocorrelator they can also be temporally overlapped. By moving the sca ...
... The beam is split up into two equally strong pulses, which are delayed by propagating different paths in the two arms of the autocorrelator. Then they are spatially overlapped in the crystal. By moving one of the mirrors in the autocorrelator they can also be temporally overlapped. By moving the sca ...
femtosecond laser - UCSB - Optical Characterization Lab
... • Z-scan works if the thickness of the sample is much smaller than the beam’s waist length. • Data processing apparatus relies on the Gaussian profile of the beam. Very accurate characterization of the pump beam is required. • Requires high energy pump pulses as well as high concentration of TPA abs ...
... • Z-scan works if the thickness of the sample is much smaller than the beam’s waist length. • Data processing apparatus relies on the Gaussian profile of the beam. Very accurate characterization of the pump beam is required. • Requires high energy pump pulses as well as high concentration of TPA abs ...
Chapter 7- Components of Optical Instruments
... shorter wavelength than the absorbed radiation. A fifth type of fluorescence can also occur. After an atom becomes electronically excited by absorption, the excited atom transfers some or all of its energy to an atom of a different element. Atomic fluorescence of that type, which is rarely encounter ...
... shorter wavelength than the absorbed radiation. A fifth type of fluorescence can also occur. After an atom becomes electronically excited by absorption, the excited atom transfers some or all of its energy to an atom of a different element. Atomic fluorescence of that type, which is rarely encounter ...
The `IEC` LASERVIEW – kit of shapes
... because any particles or loss of clarity will lose light. They usually are flexible and consist of many very fine strands of optical fibre (each one is a light guide) and they are sheathed with a material to protect them and to keep them together in one bundle. The sheathing material MUST HAVE a muc ...
... because any particles or loss of clarity will lose light. They usually are flexible and consist of many very fine strands of optical fibre (each one is a light guide) and they are sheathed with a material to protect them and to keep them together in one bundle. The sheathing material MUST HAVE a muc ...
PHYS-201 LAB-03 Bohr`s Model and Emission Spectra of Hydrogen
... The planetary model for the hydrogen atom that explained the emission spectrum of the hydrogen gas was proposed by Bohr, who made the following assumptions. [1] The electron in a hydrogen atom travels around the nucleus in a circular orbit. [2] Only some orbits with certain energies are allowed. In ...
... The planetary model for the hydrogen atom that explained the emission spectrum of the hydrogen gas was proposed by Bohr, who made the following assumptions. [1] The electron in a hydrogen atom travels around the nucleus in a circular orbit. [2] Only some orbits with certain energies are allowed. In ...
Document
... (1) Active medium with population inversion (2) Stimulated emission (3) Light amplification with resonator ...
... (1) Active medium with population inversion (2) Stimulated emission (3) Light amplification with resonator ...
Hyperfine Structure of Rubidium
... we focus our attention on the less abundant isotope. The Doppler Broadening of Absorption Spectra If we direct a laser at a collection of Rb atoms, photons cause transitions between states whenever the energy is an exact match; this absorption of energy can be measured to observe the energy transiti ...
... we focus our attention on the less abundant isotope. The Doppler Broadening of Absorption Spectra If we direct a laser at a collection of Rb atoms, photons cause transitions between states whenever the energy is an exact match; this absorption of energy can be measured to observe the energy transiti ...
Quantum-well states and discontinuities in opto
... This is illustrated in Fig. 2, where current as a function of QW width derived at constant voltage from datacurves similar to these as in Figure 1 is shown. Figure 2 presents data computed at different conditions, and marked from A to F , for several combinations of free carrier scattering coefficie ...
... This is illustrated in Fig. 2, where current as a function of QW width derived at constant voltage from datacurves similar to these as in Figure 1 is shown. Figure 2 presents data computed at different conditions, and marked from A to F , for several combinations of free carrier scattering coefficie ...
Laser Cooling
... more than 1011 cm-3 have been observed. The traps that were originally created were about 0.001 mm3, but recent ones are on the order of 1.0 cm3. This volume is directly related to the diameter of the laser beams. The beam diameter does have upper limits since it is inhibited by the size of the mirr ...
... more than 1011 cm-3 have been observed. The traps that were originally created were about 0.001 mm3, but recent ones are on the order of 1.0 cm3. This volume is directly related to the diameter of the laser beams. The beam diameter does have upper limits since it is inhibited by the size of the mirr ...
Bistability and Optical Control of a Distributed Bragg Reflector Laser
... specific underlying nonlinear mechanism that governs the bistable operation, by the type of control used (electrical, optical, or a combination of the two), and by the required switching energies. In this Letter we describe a novel bistable diode laser that is based on a specially designed distribut ...
... specific underlying nonlinear mechanism that governs the bistable operation, by the type of control used (electrical, optical, or a combination of the two), and by the required switching energies. In this Letter we describe a novel bistable diode laser that is based on a specially designed distribut ...
A.Lobko, Laser acceleration of electrons and ions: principles, issues
... flow along the cavity boundary and collide at the bubble base, before being accelerated behind the laser pulse. The fact that electrons are trapped behind the laser, where they no more interact with the laser field, contributes to improving of quality of the electron beam. ...
... flow along the cavity boundary and collide at the bubble base, before being accelerated behind the laser pulse. The fact that electrons are trapped behind the laser, where they no more interact with the laser field, contributes to improving of quality of the electron beam. ...
All Solid State Laser Source for Tunable Blue and Ultraviolet Radiation.
... The master oscillator is followed by a flared amplifier. The MOPA is originally delivered in a sealed housing including a Peltier cooler and some beam shaping optics. At room temperature the laser provides 1 W radiation at 970.3 nm. The operating current is specified by the manufacturer to be 250 mA ...
... The master oscillator is followed by a flared amplifier. The MOPA is originally delivered in a sealed housing including a Peltier cooler and some beam shaping optics. At room temperature the laser provides 1 W radiation at 970.3 nm. The operating current is specified by the manufacturer to be 250 mA ...
Generation of relativistic intensity pulses at a kilohertz
... algorithm utilized in our experiment is a genetic algorithm, so named because it mimics the mechanism of evolution in nature. The basic idea is to create a population of individuals represented by their genes and then to test this population on the system under study. The best individuals of the ini ...
... algorithm utilized in our experiment is a genetic algorithm, so named because it mimics the mechanism of evolution in nature. The basic idea is to create a population of individuals represented by their genes and then to test this population on the system under study. The best individuals of the ini ...
Optical Monte Carlo modeling of a true port wine stain anatomy
... propagation and energy deposition in arbitrarily complex geometries. A trade-off is made, however, with increased complexity of the tissues studied. The results presented above may present an extremely realistic determination of the energy deposition in this particular PWS, but complexity makes the ...
... propagation and energy deposition in arbitrarily complex geometries. A trade-off is made, however, with increased complexity of the tissues studied. The results presented above may present an extremely realistic determination of the energy deposition in this particular PWS, but complexity makes the ...
Flame Test Lab
... Introduction: According to the Bohr theory of an atom, electrons may occupy only specific energy levels. When an atom absorbs sufficient energy, an electron can “jump” to a higher energy level. Higher energy levels tend to be less stable, however, and if a lower energy level is available, the electr ...
... Introduction: According to the Bohr theory of an atom, electrons may occupy only specific energy levels. When an atom absorbs sufficient energy, an electron can “jump” to a higher energy level. Higher energy levels tend to be less stable, however, and if a lower energy level is available, the electr ...
Atmospheric Monitoring for High Energy Gamma Ray Cherenkov
... showers, is scattered and partially absorbed in the atmosphere. In the event reconstruction procedure the above effects have to be taken into account. A High Spectral Resolution Lidar (HSRL) prototype in bistatic mode is being designed to use a 120 mW CW diode SLM laser at 532 nm and two Fabry Perot ...
... showers, is scattered and partially absorbed in the atmosphere. In the event reconstruction procedure the above effects have to be taken into account. A High Spectral Resolution Lidar (HSRL) prototype in bistatic mode is being designed to use a 120 mW CW diode SLM laser at 532 nm and two Fabry Perot ...
Sensing earth`s rotation with a helium–neon ring laser operating at
... 1–10 hPa of helium. Modulations are observed on the clockwise and counterclockwise beams at the Sagnac frequency given by Eq. (1), with fractional amplitudes m1 , m2 which vary, but are typically 5%–8%. These modulations allow estimates of backscatter fractional amplitude coupling r 1;2 using r 1;2 ...
... 1–10 hPa of helium. Modulations are observed on the clockwise and counterclockwise beams at the Sagnac frequency given by Eq. (1), with fractional amplitudes m1 , m2 which vary, but are typically 5%–8%. These modulations allow estimates of backscatter fractional amplitude coupling r 1;2 using r 1;2 ...
I. Introduction - Politecnico di Torino
... Semiconductor mode locked laser diodes are very compact and efficient sources for generation of short optical pulses at high repetition rate. They are mainly used in optical telecommunications [1] (high bit rate transmissions, all optical clock recovery, millimeter wave generation). They can also be ...
... Semiconductor mode locked laser diodes are very compact and efficient sources for generation of short optical pulses at high repetition rate. They are mainly used in optical telecommunications [1] (high bit rate transmissions, all optical clock recovery, millimeter wave generation). They can also be ...
Stability of Continuously Pumped Atom Lasers
... Single (or few) mode quantum theories have been used to describe continuously pumped atom lasers [11]. Unfortunately, these models cannot describe the multimode behavior of the atom laser such as the non-Markovian nature of the output coupling [12], except under the approximation that the lasing mod ...
... Single (or few) mode quantum theories have been used to describe continuously pumped atom lasers [11]. Unfortunately, these models cannot describe the multimode behavior of the atom laser such as the non-Markovian nature of the output coupling [12], except under the approximation that the lasing mod ...
ATOMIC SPECTRA Theory
... 6. A heavy hydrogen (deuterium) has a mass twice that of a hydrogen. Hydrogen and deuterium are ’isotopes’, which means that they have the same number of protons but different numbers of neutrons in the nucleus of the atom. Calculate the difference in wavelength produced by the difference in reduced ...
... 6. A heavy hydrogen (deuterium) has a mass twice that of a hydrogen. Hydrogen and deuterium are ’isotopes’, which means that they have the same number of protons but different numbers of neutrons in the nucleus of the atom. Calculate the difference in wavelength produced by the difference in reduced ...
PH 481 - Physics | Oregon State University
... mounted in a Thor Labs rotation stage. It is not oriented in the mount; it is your job to find the transmission axis. In order to do this and to find the Brewster angle B, rotate the reflector so that the incident angle i ≈ 55˚ and view the reflected beam on a card. Adjust the polarizer so as to ...
... mounted in a Thor Labs rotation stage. It is not oriented in the mount; it is your job to find the transmission axis. In order to do this and to find the Brewster angle B, rotate the reflector so that the incident angle i ≈ 55˚ and view the reflected beam on a card. Adjust the polarizer so as to ...
Adaptive secondary mirrors
... – Advantageous spectral and temporal profile – Potential for high beam quality due to non-linear mixing – Good format for optical pumping with circular polarization • Kibblewhite (U Chicago and Mt Palomar), Telle (Air Force Research Lab), Coherent Technologies Incorporated (for Gemini N and S Observ ...
... – Advantageous spectral and temporal profile – Potential for high beam quality due to non-linear mixing – Good format for optical pumping with circular polarization • Kibblewhite (U Chicago and Mt Palomar), Telle (Air Force Research Lab), Coherent Technologies Incorporated (for Gemini N and S Observ ...
Laser pumping
Laser pumping is the act of energy transfer from an external source into the gain medium of a laser. The energy is absorbed in the medium, producing excited states in its atoms. When the number of particles in one excited state exceeds the number of particles in the ground state or a less-excited state, population inversion is achieved. In this condition, the mechanism of stimulated emission can take place and the medium can act as a laser or an optical amplifier. The pump power must be higher than the lasing threshold of the laser.The pump energy is usually provided in the form of light or electric current, but more exotic sources have been used, such as chemical or nuclear reactions.