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... of the MPUVL can be designed to allow one or more lamps to be used and in any shape. A twin MPUVL system arrangement can be seen in Figure 4. The lamp arrangement does not induce any severe losses to the microwave coupling, and the power is divided equally among the lamps of which the thermal burden ...
... of the MPUVL can be designed to allow one or more lamps to be used and in any shape. A twin MPUVL system arrangement can be seen in Figure 4. The lamp arrangement does not induce any severe losses to the microwave coupling, and the power is divided equally among the lamps of which the thermal burden ...
Terahertz quantum cascade lasers operating up to ∼ 200 K with
... active regions is lowered by parasitic injection and extraction tunneling channels [16, 17]. Kumar et al. proposed to make the lasing transition more diagonal in order to increase the upper lasing state lifetime and reduce the strength of undesired tunneling couplings, which leads to an improved pop ...
... active regions is lowered by parasitic injection and extraction tunneling channels [16, 17]. Kumar et al. proposed to make the lasing transition more diagonal in order to increase the upper lasing state lifetime and reduce the strength of undesired tunneling couplings, which leads to an improved pop ...
Color center production by femtosecond-pulse laser
... study of defects produced, such as color centers, is then a useful approach, which can be applied to understand the relevance of such degradation processes and their microscopic mechanisms. The threshold for color center creation was 1.9 TW/cm2 for LiYF4. Color center lasers have some important opti ...
... study of defects produced, such as color centers, is then a useful approach, which can be applied to understand the relevance of such degradation processes and their microscopic mechanisms. The threshold for color center creation was 1.9 TW/cm2 for LiYF4. Color center lasers have some important opti ...
Design study of a Magneto-Optical Trap for laser cooling of rubidium
... Rubidium is an Alkali-metal. The Alkali-metals were the first group of atoms that was cooled and trapped [1]. They have transitions from the ground state to excited states, that correspond to wavelengths in the visible or near infra red (NIR) regions. They can also easily be generated in atomic beam ...
... Rubidium is an Alkali-metal. The Alkali-metals were the first group of atoms that was cooled and trapped [1]. They have transitions from the ground state to excited states, that correspond to wavelengths in the visible or near infra red (NIR) regions. They can also easily be generated in atomic beam ...
3.4-?m ZGP RISTRA nanosecond - AS
... poor beam quality, however the RISTRA can deliver good beam quality for NF ≥ 400 [12, 13], and it has generated a 1550-nm signal beam with M2 ≈ 4 for pulse energies of 150 mJ [14]. An additional benefit of the RISTRA design, which is shown in Fig. 4(a), is that ring cavities having non-planar geomet ...
... poor beam quality, however the RISTRA can deliver good beam quality for NF ≥ 400 [12, 13], and it has generated a 1550-nm signal beam with M2 ≈ 4 for pulse energies of 150 mJ [14]. An additional benefit of the RISTRA design, which is shown in Fig. 4(a), is that ring cavities having non-planar geomet ...
Introduction to Atomic Physics Lab Report
... numbers. Instead we use the total angular momentum j and its z-component mj . Depending on the quantum numbers, the electrons have different energies. According to the Bohr model for hydrogen, the energies only depend on the principal quantum number n: The energy increases for larger n. The fine str ...
... numbers. Instead we use the total angular momentum j and its z-component mj . Depending on the quantum numbers, the electrons have different energies. According to the Bohr model for hydrogen, the energies only depend on the principal quantum number n: The energy increases for larger n. The fine str ...
en_20160128_lzh_pm_hymnos_final
... fiber amplifiers, dielectric coatings and light propagation in fluid columns. Highest laser powers In the subproject „Dynamic light propagation in high output glass fiber amplifiers“, the scientists will be working on increasing the laser power of continuous and pulsed systems for the next three yea ...
... fiber amplifiers, dielectric coatings and light propagation in fluid columns. Highest laser powers In the subproject „Dynamic light propagation in high output glass fiber amplifiers“, the scientists will be working on increasing the laser power of continuous and pulsed systems for the next three yea ...
Nonlinear optics in daily life
... require high-power pulsed laser pumps and provide an output at longer wavelengths. Geometries may be single pass amplifiers, resonators (Raman lasers), oscillator-amplifier configurations and/or waveguides. SRS generation can be intra-cavity or extra-cavity. Long fiber lengths enable low Raman laser ...
... require high-power pulsed laser pumps and provide an output at longer wavelengths. Geometries may be single pass amplifiers, resonators (Raman lasers), oscillator-amplifier configurations and/or waveguides. SRS generation can be intra-cavity or extra-cavity. Long fiber lengths enable low Raman laser ...
A tunable low-energy photon source for high
... materials are highly absorptive. Mirrors are therefore “UVenhanced” (MgF2 -coated) aluminum; aluminum has a high reflectivity at ultraviolet wavelengths and a MgF2 overlayer prevents oxidation of the metallic surface. Both CaF2 and MgF2 are acceptable materials for lenses and windows, provided they ...
... materials are highly absorptive. Mirrors are therefore “UVenhanced” (MgF2 -coated) aluminum; aluminum has a high reflectivity at ultraviolet wavelengths and a MgF2 overlayer prevents oxidation of the metallic surface. Both CaF2 and MgF2 are acceptable materials for lenses and windows, provided they ...
Laser Chemosensor with Rapid Responsivity and Inherent Memory
... the dynamics of the PL emission were monitored for the first 3 min. The emission from the same film was then also measured after a 30-min exposure. Additionally, a cumulative PL sensing scheme was achieved by monitoring the PL emission while switching the gas flow between clean nitrogen and DNB vapo ...
... the dynamics of the PL emission were monitored for the first 3 min. The emission from the same film was then also measured after a 30-min exposure. Additionally, a cumulative PL sensing scheme was achieved by monitoring the PL emission while switching the gas flow between clean nitrogen and DNB vapo ...
Tuneable, stabilised diode lasers for compact atomic frequency
... most cases be superior to the stability and precision of the laser modules discussed here, a compact device offers the potential for, e.g. mobile applications with volume restrictions or applications requiring large unit numbers but moderate price. Depending on the specific application the implemente ...
... most cases be superior to the stability and precision of the laser modules discussed here, a compact device offers the potential for, e.g. mobile applications with volume restrictions or applications requiring large unit numbers but moderate price. Depending on the specific application the implemente ...
Full text
... there is a shift in the data to higher wavenumbers corresponding to higher effective index. Over the five peaks shown, average ∆k of 0.11 cm-1 after 10 minutes and 0.15 cm-1 after 20 minutes are obtained. These shifts are normalized to obtain a change in effective index of 9.5 x 10-5 and 1.2 x 10-4 ...
... there is a shift in the data to higher wavenumbers corresponding to higher effective index. Over the five peaks shown, average ∆k of 0.11 cm-1 after 10 minutes and 0.15 cm-1 after 20 minutes are obtained. These shifts are normalized to obtain a change in effective index of 9.5 x 10-5 and 1.2 x 10-4 ...
ps fiber laser for CARS-authorproof-v2
... With up to 14 W of pump power, up to 6 W is obtained from the amplifier. The beam quality is good: M2 = 1.1 is measured. The spectra of the amplified pulses at different output powers are shown in Fig. 2(c). For powers above ~2 W the spectrum begins to distort. At 6 W the spectrum has broadened by ...
... With up to 14 W of pump power, up to 6 W is obtained from the amplifier. The beam quality is good: M2 = 1.1 is measured. The spectra of the amplified pulses at different output powers are shown in Fig. 2(c). For powers above ~2 W the spectrum begins to distort. At 6 W the spectrum has broadened by ...
Edgars Nitiss - Application Note Organic Lasers
... photonics. One of such opportunities would be to build cheap and effective dye laser sources that would be based on organic materials. By finding the appropriate materials, such lasers could operate over the entire range of visible spectrum. Since the first demonstration of a dye laser by Soffer and ...
... photonics. One of such opportunities would be to build cheap and effective dye laser sources that would be based on organic materials. By finding the appropriate materials, such lasers could operate over the entire range of visible spectrum. Since the first demonstration of a dye laser by Soffer and ...
properties of helium–neon lasers - UCSB Physics
... the laser strike the mirrors and are reflected back along the axis, further increasing the amplification. (By contrast, photons which don't point down the axis of the cylinder will quickly leave the cavity and have fewer chances to collide with Ne atoms. These photons will not be amplified.) One of ...
... the laser strike the mirrors and are reflected back along the axis, further increasing the amplification. (By contrast, photons which don't point down the axis of the cylinder will quickly leave the cavity and have fewer chances to collide with Ne atoms. These photons will not be amplified.) One of ...
The Doppler Factor and Quantum Electrodynamics Basics in Laser
... idea was re-enforced by further calculations [2,3] and remains a possibility [4]. This idea is based on the source, the laser, having a constant wavelength while the reflector results in a change in momentum after a reflection; the change in momentum of a reflector can result in a doppler shift, whe ...
... idea was re-enforced by further calculations [2,3] and remains a possibility [4]. This idea is based on the source, the laser, having a constant wavelength while the reflector results in a change in momentum after a reflection; the change in momentum of a reflector can result in a doppler shift, whe ...
2. Ring-laser gyroscopes (RLGs)
... As the laser source is external to the ring, solid-state lasers may be used in place of gas-lasers, considerably reducing the power consumption and voltages required for operation. To provide an area similar to that of Michelson's device (see previous page), using loops enclosing 25 m2 (approx 5.64 ...
... As the laser source is external to the ring, solid-state lasers may be used in place of gas-lasers, considerably reducing the power consumption and voltages required for operation. To provide an area similar to that of Michelson's device (see previous page), using loops enclosing 25 m2 (approx 5.64 ...
CW mode-locked dye lasers for ultra fast spectroscopic studies
... So far, however, slightly shorter pulses can be obtained from passively mode-locked systems (0.3 ps) but the gap is being rapidly narrowed. The shortest pulses obtained from a simple synchronously pumped system, that are well mode-locked, have a duration of between 1.7 ps and 2.2 p~.“-‘~~ ” Subpicos ...
... So far, however, slightly shorter pulses can be obtained from passively mode-locked systems (0.3 ps) but the gap is being rapidly narrowed. The shortest pulses obtained from a simple synchronously pumped system, that are well mode-locked, have a duration of between 1.7 ps and 2.2 p~.“-‘~~ ” Subpicos ...
SPICE Simulation for Analysis and Design of Fast 1.55 micrometer
... and 2) state transport, relaxation of carriers at the bottom of the quantum well, net result of the competing phenomena of capture and escape (Fig. 1). Starting from these considerations we have developed a model satisfying the requirements of fast computing and high accuracy. Rate equations have be ...
... and 2) state transport, relaxation of carriers at the bottom of the quantum well, net result of the competing phenomena of capture and escape (Fig. 1). Starting from these considerations we have developed a model satisfying the requirements of fast computing and high accuracy. Rate equations have be ...
Powerpoint file - Department of Physics
... Suppose the laser has the right colour for the photons to be absorbed by an approaching atom, then the atom will be slowed down. However, the laser will not have the right colour for the photons to be absorbed by the receding atom because of Doppler effect. Hence the atom will not change in this c ...
... Suppose the laser has the right colour for the photons to be absorbed by an approaching atom, then the atom will be slowed down. However, the laser will not have the right colour for the photons to be absorbed by the receding atom because of Doppler effect. Hence the atom will not change in this c ...
Investigation of spectral gain narrowing in quantum cascade lasers
... 共QCLs兲 has been achieved in the last few years leading to long wavelength,1 high power,2 low current,3 and high temperature operation.4 In order to realize further improvements, a better understanding of the gain formation mechanism and its limiting factors is needed. To this end it is necessary to ...
... 共QCLs兲 has been achieved in the last few years leading to long wavelength,1 high power,2 low current,3 and high temperature operation.4 In order to realize further improvements, a better understanding of the gain formation mechanism and its limiting factors is needed. To this end it is necessary to ...
Tutorial: Are You Safe at a Laser Light Show?
... The BC20 is able to overcome the deficiencies in using a standard power meter detector. The peak hold detector of the BC20 is able to register pulses as short as 10us, thus making the device suitable for directly measuring the peak power present in the majority of scanned laser show emissions. Once ...
... The BC20 is able to overcome the deficiencies in using a standard power meter detector. The peak hold detector of the BC20 is able to register pulses as short as 10us, thus making the device suitable for directly measuring the peak power present in the majority of scanned laser show emissions. Once ...
Polymer laser fabricated by a simple micromolding process
... polymers has been the distributed feedback 共DFB兲 laser. Most fabrication to date has involved spin-coating the polymer onto microstructured silica substrates to form DFB lasers of various geometries including single gratings, crossed gratings, and circular gratings.6 –9 These substrates are usually ...
... polymers has been the distributed feedback 共DFB兲 laser. Most fabrication to date has involved spin-coating the polymer onto microstructured silica substrates to form DFB lasers of various geometries including single gratings, crossed gratings, and circular gratings.6 –9 These substrates are usually ...
Optics - Frederiksen
... During operation the lamp housing is ventilated by means of a built-in ventilator, so the surface temperature of the housing will not exceed 60 °C. The Reuter Lamp has both a bi-pin socket for halogen lamps 12 V/50 W (item no. 4270.10) and a bayonet socket for 12 V/35 W lamps (item no. 4265.40). Len ...
... During operation the lamp housing is ventilated by means of a built-in ventilator, so the surface temperature of the housing will not exceed 60 °C. The Reuter Lamp has both a bi-pin socket for halogen lamps 12 V/50 W (item no. 4270.10) and a bayonet socket for 12 V/35 W lamps (item no. 4265.40). Len ...
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.