Conference title, upper and lower case, bolded, 18 point type
... in a hydrogen-filled anti-resonant hollow-core fiber pumped with a 1064 nm microchip laser. A maximum quantum conversion efficiency ~48% was achieved by using a 6.5 m length of fiber filled with 23 bar hydrogen, with a maximum peak output power of 2 kW. By properly designing the transmission bands o ...
... in a hydrogen-filled anti-resonant hollow-core fiber pumped with a 1064 nm microchip laser. A maximum quantum conversion efficiency ~48% was achieved by using a 6.5 m length of fiber filled with 23 bar hydrogen, with a maximum peak output power of 2 kW. By properly designing the transmission bands o ...
Finite-momentum condensation in a pumped microcavity R. T. Brierley
... When the dots are unoccupied D0共兲 ⬍ 0 and the empty exciton states contribute to absorption. For energies where there are occupied exciton states D0共兲 ⬎ 0, describing gain due to the population. In general, the response, Eq. 共10兲, peaks near the zeroes of G共兲, which are at the energies of the nor ...
... When the dots are unoccupied D0共兲 ⬍ 0 and the empty exciton states contribute to absorption. For energies where there are occupied exciton states D0共兲 ⬎ 0, describing gain due to the population. In general, the response, Eq. 共10兲, peaks near the zeroes of G共兲, which are at the energies of the nor ...
Control of the frequency comb from a modelocked
... a comb, although control was not demonstrated [15,16]. With further improvement, it will be possible to use these results to coherently stitch together the frequency comb from a mode-locked fiber laser with that of a Ti:S laser, as has been demonstrated for two Ti:S lasers [17,18]. This can produce ...
... a comb, although control was not demonstrated [15,16]. With further improvement, it will be possible to use these results to coherently stitch together the frequency comb from a mode-locked fiber laser with that of a Ti:S laser, as has been demonstrated for two Ti:S lasers [17,18]. This can produce ...
High accuracy ranging with Yb -doped fiber-ring frequency
... rather than an absolute positional measurement. Furthermore, distances obtained using a single-wavelength interferometer have an ambiguity of half a wavelength. Most interferometric systems use mirrors as reflectors and frequency-stabilized lasers. The accuracy of the interferomet- ...
... rather than an absolute positional measurement. Furthermore, distances obtained using a single-wavelength interferometer have an ambiguity of half a wavelength. Most interferometric systems use mirrors as reflectors and frequency-stabilized lasers. The accuracy of the interferomet- ...
Metal surface structuring with spatiotemporally focused femtosecond
... observation is rather unclear and provides a nice topic of research to be systematically investigated in the future. Nevertheless, generally speaking, the physics has to be related to the different material properties of the metals as has been discussed in Ref. 22. The three metals investigated in t ...
... observation is rather unclear and provides a nice topic of research to be systematically investigated in the future. Nevertheless, generally speaking, the physics has to be related to the different material properties of the metals as has been discussed in Ref. 22. The three metals investigated in t ...
Quantum State Engineering on an Optical Transition and
... with vy 苷 共2p兲 2 MHz, we transfer 95% of the population to the motional ground state. Ground state cooling is also possible at lower trap frequencies, however slightly less efficient. At trap frequencies of vz 苷 共2p兲 2 MHz, vy 苷 共2p兲 0.92 MHz, we achieve 具nz 典 苷 0.95 and 具ny 典 苷 0.85, respectively. ...
... with vy 苷 共2p兲 2 MHz, we transfer 95% of the population to the motional ground state. Ground state cooling is also possible at lower trap frequencies, however slightly less efficient. At trap frequencies of vz 苷 共2p兲 2 MHz, vy 苷 共2p兲 0.92 MHz, we achieve 具nz 典 苷 0.95 and 具ny 典 苷 0.85, respectively. ...
of GaAs/AlGaAs Dimensional Surface-EmittingArrays
... The performance of the linear arrays depends on the stripe width Wand laser period S. Figure 7 plots lrh and emission wavelength for proton-defined uncoated lasers made from 800-nm material versus WFor stripes wider than -40 J1ffi, the values of1m, emission wavelength, and 1Jd (not shown) are nearly ...
... The performance of the linear arrays depends on the stripe width Wand laser period S. Figure 7 plots lrh and emission wavelength for proton-defined uncoated lasers made from 800-nm material versus WFor stripes wider than -40 J1ffi, the values of1m, emission wavelength, and 1Jd (not shown) are nearly ...
Ultracold Triplet Molecules in the Rovibrational
... two STIRAP pulses (diamonds in Fig. 2). Any such molecules would quickly be removed by laser 1 at the end of the first STIRAP pulse, which is kept on at maximum power for 1 s after ramping down laser 2. Thus, all molecules that are retrieved after the second STIRAP transfer have been deeply bound i ...
... two STIRAP pulses (diamonds in Fig. 2). Any such molecules would quickly be removed by laser 1 at the end of the first STIRAP pulse, which is kept on at maximum power for 1 s after ramping down laser 2. Thus, all molecules that are retrieved after the second STIRAP transfer have been deeply bound i ...
Analysis of optical damage mechanisms in hollow core
... will focus light with a greater NA and therefore couple light into a greater number of modes. Figure 2 shows three images of the output from a waveguide taken using a single lens to image the core onto a CCD camera. Profiles are shown for input lenses of 88 mm, 125 mm and 250 mm focal length. The sp ...
... will focus light with a greater NA and therefore couple light into a greater number of modes. Figure 2 shows three images of the output from a waveguide taken using a single lens to image the core onto a CCD camera. Profiles are shown for input lenses of 88 mm, 125 mm and 250 mm focal length. The sp ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... Since the gain curve shown in above figures are relatively flat at the peak point 14, in comparison with the sides 10 and 12, the amplitude of modulation of the light intensity is less when RLG is operating at its peak, in comparison to when it is operating with a path length which is either under o ...
... Since the gain curve shown in above figures are relatively flat at the peak point 14, in comparison with the sides 10 and 12, the amplitude of modulation of the light intensity is less when RLG is operating at its peak, in comparison to when it is operating with a path length which is either under o ...
Dynamic holography in a broad-area optically pumped vertical GaAs microcavity
... The diffraction efficiency of photorefractive quantum wells is fundamentally limited to only several percent, even when one is using microcavity enhancements,15 because the PRQW’s rely intrinsically on an absorptive optical nonlinearity. This has limited their use to singlestage applications. It has ...
... The diffraction efficiency of photorefractive quantum wells is fundamentally limited to only several percent, even when one is using microcavity enhancements,15 because the PRQW’s rely intrinsically on an absorptive optical nonlinearity. This has limited their use to singlestage applications. It has ...
High Power Operation of a 17 GHz Photocathode RF Gun
... modes when connected to a mismatched load. Microwaves associated with these modes are slightly higher in frequency than the operating frequency of the klystron. To eliminate these modes which reduce the stability and gain of the amplifier, a Bragg filter has been designed and installed on the RF gun ...
... modes when connected to a mismatched load. Microwaves associated with these modes are slightly higher in frequency than the operating frequency of the klystron. To eliminate these modes which reduce the stability and gain of the amplifier, a Bragg filter has been designed and installed on the RF gun ...
Efficient output coupling of intracavity high harmonic generation
... revolutionized optical frequency metrology [1, 2]. However these techniques have in general been limited to the visible and near IR spectral regions. Meanwhile, progress in short-wavelength light sources has been rapid, achieving unprecedented temporal resolution, spectral coverage, and brightness [ ...
... revolutionized optical frequency metrology [1, 2]. However these techniques have in general been limited to the visible and near IR spectral regions. Meanwhile, progress in short-wavelength light sources has been rapid, achieving unprecedented temporal resolution, spectral coverage, and brightness [ ...
LASER LITHOTRIPSY OF KIDNEY CALCULI WITH A Nd:YAG
... The fibre is an important instrumental part in laser lithotripsy. It is the laser power delivery tool, and there are a great number of demands, placed on the fibre. Above all, it must be able to transmit the high energy and power from the laser without being damaged. To destroy a stone a high laser ...
... The fibre is an important instrumental part in laser lithotripsy. It is the laser power delivery tool, and there are a great number of demands, placed on the fibre. Above all, it must be able to transmit the high energy and power from the laser without being damaged. To destroy a stone a high laser ...
c =λ* f λ = wavelength
... Later was the achievement of population inversion by pumping (optical pumping) in 1955 then was the design of solid state masers (Ruby) in 1957. There was a great hope to extend the application of the stimulated emission to the visible part of the electro-magnetic spectrum (later called the Optical ...
... Later was the achievement of population inversion by pumping (optical pumping) in 1955 then was the design of solid state masers (Ruby) in 1957. There was a great hope to extend the application of the stimulated emission to the visible part of the electro-magnetic spectrum (later called the Optical ...
Coherent Laser Beam Addition: Application of Binary-Optics Technology An
... To obtain high radiance from a laser array, three conditions must be met. First, the lasers must be mutually coherent; that is, they must be phase- and frequency-locked to one another. Without coherence, any beam emanating from the array would spread, reducing the radiance of the output. Second, the ...
... To obtain high radiance from a laser array, three conditions must be met. First, the lasers must be mutually coherent; that is, they must be phase- and frequency-locked to one another. Without coherence, any beam emanating from the array would spread, reducing the radiance of the output. Second, the ...
High-resolution broadband (>100 cm ) infrared heterodyne spectro
... cm-1 has been performed. The widely tunable LHR is demonstrated through two separate operating modes: a broadband tuning mode with low frequency sampling resolution (~0.5 cm-1) using only coarse grating tuning and a high-resolution (~0.001 cm-1) tuning mode where broadband coverage and mode-hop-free ...
... cm-1 has been performed. The widely tunable LHR is demonstrated through two separate operating modes: a broadband tuning mode with low frequency sampling resolution (~0.5 cm-1) using only coarse grating tuning and a high-resolution (~0.001 cm-1) tuning mode where broadband coverage and mode-hop-free ...
Experimental Demonstration of Ground State Laser Cooling with
... following the original proposal [4], is the preparation of the ions in the quantum mechanical ground state of their motion by laser cooling. While a single trapped ion was laser cooled to the motional ground state as early as 1989 [5], ground state cooling of an ion string [6] and its combination wi ...
... following the original proposal [4], is the preparation of the ions in the quantum mechanical ground state of their motion by laser cooling. While a single trapped ion was laser cooled to the motional ground state as early as 1989 [5], ground state cooling of an ion string [6] and its combination wi ...
Laser hazard control checklist
... During laser operation, is access to the laser environment restricted to persons wearing proper laser protective eyewear and protective clothing? Are laser tubes properly mounted so that thermal expansion, vibration, and other sources of movements in them do not significantly affect the alignment of ...
... During laser operation, is access to the laser environment restricted to persons wearing proper laser protective eyewear and protective clothing? Are laser tubes properly mounted so that thermal expansion, vibration, and other sources of movements in them do not significantly affect the alignment of ...
Optical Cavity and laser Modes
... Plane Parallel Optical Cavity. At both ends there are two plan mirrors (R1 =∞, R2 = ∞ ), parallel to each other, and perpendicular to the laser optical axis. Advantages: •Optimal use of all the volume of the active medium. Thus, used in pulsed lasers which need the maximum energy. •No focusing of t ...
... Plane Parallel Optical Cavity. At both ends there are two plan mirrors (R1 =∞, R2 = ∞ ), parallel to each other, and perpendicular to the laser optical axis. Advantages: •Optimal use of all the volume of the active medium. Thus, used in pulsed lasers which need the maximum energy. •No focusing of t ...
Laser wake field acceleration: the highly non
... spectrum for case (I) and even a spectrum sharply peaked in energy for the solitary acceleration bubble of case (II). We describe in Sect. 3 how the peaked spectrum is related to beamloading effects. In this paper, we can give only numerical results for a few selected cases located in the parameter ...
... spectrum for case (I) and even a spectrum sharply peaked in energy for the solitary acceleration bubble of case (II). We describe in Sect. 3 how the peaked spectrum is related to beamloading effects. In this paper, we can give only numerical results for a few selected cases located in the parameter ...
Thin disk laser: power scaling to the kW regime in fundamental
... 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 four disks, are commercially available. These lasers operate typically in a high-order multi-mode (M2 ≈ 20). Interest ...
... 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 four disks, are commercially available. These lasers operate typically in a high-order multi-mode (M2 ≈ 20). Interest ...
Production of coherent radiation by atoms and molecules
... It is also useful to state the spectral width of the radiation emitted from a maser oscillator, as well as the precision to which the frequency can be determined. The half width of the spectral distribution is again determined by the same noise fluctuation and is given by10,15,16 ...
... It is also useful to state the spectral width of the radiation emitted from a maser oscillator, as well as the precision to which the frequency can be determined. The half width of the spectral distribution is again determined by the same noise fluctuation and is given by10,15,16 ...
Ultrahigh-resolution optical coherence tomography
... mW [13,14]. The Cr3+:LiCAF laser used in this study is pumped by the orthogonally polarized beams from two broad-area laser diodes (Coherent S-670-500C) with 500 mW optical power, each in an elliptical multimode beam. The emitter size of the diodes are 1 × 100 µm. Along the fast diverging axis, the ...
... mW [13,14]. The Cr3+:LiCAF laser used in this study is pumped by the orthogonally polarized beams from two broad-area laser diodes (Coherent S-670-500C) with 500 mW optical power, each in an elliptical multimode beam. The emitter size of the diodes are 1 × 100 µm. Along the fast diverging axis, the ...
Picosecond-pulse amplification with an external passive optical cavity
... ing losses of the cavity. A cavity finesse of 546 would be obtained if no further losses were present. However, based on measurements of the intracavity energy buildup, a finesse of 349 is estimated, indicating an additional 0.65% loss in the cavity, most likely due to loss in the input coupler. Und ...
... ing losses of the cavity. A cavity finesse of 546 would be obtained if no further losses were present. However, based on measurements of the intracavity energy buildup, a finesse of 349 is estimated, indicating an additional 0.65% loss in the cavity, most likely due to loss in the input coupler. Und ...
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.