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OSA journals template (MSWORD) - HAL
... Figure 1 shows our experimental results of pulse compression using the planar waveguide (measured at the center of the beam). The upper row (Fig.1a-b) shows the input/output spectra and measured intensity and phase obtained using argon (1.5 atm) and Fig.1c-d shows the same measurements obtained usin ...
... Figure 1 shows our experimental results of pulse compression using the planar waveguide (measured at the center of the beam). The upper row (Fig.1a-b) shows the input/output spectra and measured intensity and phase obtained using argon (1.5 atm) and Fig.1c-d shows the same measurements obtained usin ...
Giving a boost to atoms (pdf, 124 kB)
... The ability of optically pumped condensate atoms to serve as a gain medium for matterwave amplification was first observed by the MIT group4. They showed that a pumped condensate, initially radiating photons by spontaneous emission, had sufficient gain to amplify emission in a random direction. This ...
... The ability of optically pumped condensate atoms to serve as a gain medium for matterwave amplification was first observed by the MIT group4. They showed that a pumped condensate, initially radiating photons by spontaneous emission, had sufficient gain to amplify emission in a random direction. This ...
1 - www2
... Examples. 1) Compare the brightness of the Sun with that of a typical He-Ne gas laser. The Sun has a surface temperature of ~ 6,000 K and the power density of its radiation is ρ = σ T4 = 5.6696·10−8 ·(6,000)4 W·m-2 = 7.4·107 W·m-2 derived from the Stefan-Boltzmann’s law. Thus, the brightness of the ...
... Examples. 1) Compare the brightness of the Sun with that of a typical He-Ne gas laser. The Sun has a surface temperature of ~ 6,000 K and the power density of its radiation is ρ = σ T4 = 5.6696·10−8 ·(6,000)4 W·m-2 = 7.4·107 W·m-2 derived from the Stefan-Boltzmann’s law. Thus, the brightness of the ...
An Introduction to Pulsed Dye Lasers Introduction Light amplification
... emission is then created from a three level system in the Ne atom. This process is called sensitization, where the excited He atoms are the sanitizers. The last requirement for laser action is a resonant cavity. In a dye laser, the dye solution is held in a cuvet. Two mirrors are placed on either si ...
... emission is then created from a three level system in the Ne atom. This process is called sensitization, where the excited He atoms are the sanitizers. The last requirement for laser action is a resonant cavity. In a dye laser, the dye solution is held in a cuvet. Two mirrors are placed on either si ...
reaction of butanal to diethyl maleate
... concentration are very different with the two sources. It is thus not surprising that the reaction dynamics can be very different, especially if various kinetic orders are involved, leading to new quantitatively interesting results. To summarize, the low E value at 355 nm is the main reason for the ...
... concentration are very different with the two sources. It is thus not surprising that the reaction dynamics can be very different, especially if various kinetic orders are involved, leading to new quantitatively interesting results. To summarize, the low E value at 355 nm is the main reason for the ...
nλ = dsinθ
... 1. Set the meter sticks on the end table at the base of the lamp. Be sure the two are exactly perpendicular to each other and that the stick is balanced at its 50 cm mark. 2. Put the grating on its support and place it on the optical bench so that it is about 100 cm from the mercury discharge tube. ...
... 1. Set the meter sticks on the end table at the base of the lamp. Be sure the two are exactly perpendicular to each other and that the stick is balanced at its 50 cm mark. 2. Put the grating on its support and place it on the optical bench so that it is about 100 cm from the mercury discharge tube. ...
Superluminal ring laser for hypersensitive sensing H. N. Yum, M. Salit,
... where ng is the group index. For vanishing ng, the value of ξ diverges. However, higher order non-linearities within the anomalous dispersion profile prevents the divergence, limiting ξ to a finite value that can be as large as 107 for realistic condition. This process is called superluminal enhance ...
... where ng is the group index. For vanishing ng, the value of ξ diverges. However, higher order non-linearities within the anomalous dispersion profile prevents the divergence, limiting ξ to a finite value that can be as large as 107 for realistic condition. This process is called superluminal enhance ...
Carrier plasma shift in GaInAsP photonic crystal point defect cavity
... Spectra near l ¼ 1.536 mm under such light irradiation are shown in Fig. 3b and c. The resonant peak blue-shifted by <1 nm for an absorbed power of 13 mW and 5.6 nm for 850 mW. Considering the surface recombination at airholes [7] and assuming a carrier lifetime of 4 ns, a pump power of 850 mW corre ...
... Spectra near l ¼ 1.536 mm under such light irradiation are shown in Fig. 3b and c. The resonant peak blue-shifted by <1 nm for an absorbed power of 13 mW and 5.6 nm for 850 mW. Considering the surface recombination at airholes [7] and assuming a carrier lifetime of 4 ns, a pump power of 850 mW corre ...
Investigation of possible microcavity effect on lasing threshold of nonradiative-scattering-dominated semiconductor lasers
... the cavity. In essence, the rate of spontaneous emission can certainly be altered by changing the electromagnetic mode densities using a microcavity. However, the gain (loss) reflects the amplification (attenuation) of a single electromagnetic mode (which can be seen clearly from the definition of g ...
... the cavity. In essence, the rate of spontaneous emission can certainly be altered by changing the electromagnetic mode densities using a microcavity. However, the gain (loss) reflects the amplification (attenuation) of a single electromagnetic mode (which can be seen clearly from the definition of g ...
THE BASIC PRINCIPLES OF LASER TECHNOLOGY, USES AND
... A cascade effect of stimulated emission of photons occurs, resulting in further amplification (optical gain) and soon many of the atoms emit light along the same axis. For a laser to sustain function, the majority of the atoms must be maintained in the excited state, hence called “population inversi ...
... A cascade effect of stimulated emission of photons occurs, resulting in further amplification (optical gain) and soon many of the atoms emit light along the same axis. For a laser to sustain function, the majority of the atoms must be maintained in the excited state, hence called “population inversi ...
Phys405-Chapter5
... laser light is tuned across the optical transitions by changing the temperature or the current injected through the diode. Interestingly, the excited rubidium atoms, produced by absorption of the laser light, will de-excite back to the ground state and emit light at the same frequency. When the expe ...
... laser light is tuned across the optical transitions by changing the temperature or the current injected through the diode. Interestingly, the excited rubidium atoms, produced by absorption of the laser light, will de-excite back to the ground state and emit light at the same frequency. When the expe ...
Photonic Devices I Purpose of the Lab
... enough to produce sufficient feedback (reflection) for lasing to take place. However, in a perfect DFB laser there are actually two lines produced (one at each side of the Bragg wavelength). We only want one line. A way of achieving this and improving the efficiency of the device is to place a high ...
... enough to produce sufficient feedback (reflection) for lasing to take place. However, in a perfect DFB laser there are actually two lines produced (one at each side of the Bragg wavelength). We only want one line. A way of achieving this and improving the efficiency of the device is to place a high ...
Laser - nptel
... veritable use of lasers possible is the highly collimated nature of the laser beams and the consequent possibility of delivering a very high energy density in a limited region of space. Depending on the material used for the active medium , lasers are broadly classified as (i) conventional or gas la ...
... veritable use of lasers possible is the highly collimated nature of the laser beams and the consequent possibility of delivering a very high energy density in a limited region of space. Depending on the material used for the active medium , lasers are broadly classified as (i) conventional or gas la ...
photoelectric effect w06
... A. Introduction In 1887 Heinrich Hertz discovered, quite accidentally, that ultraviolet light falling on the surfaces of metal electrodes produced a spark at a voltage lower than that which would produce sparking in the absence of the light. A surprise was that different metals required light of dif ...
... A. Introduction In 1887 Heinrich Hertz discovered, quite accidentally, that ultraviolet light falling on the surfaces of metal electrodes produced a spark at a voltage lower than that which would produce sparking in the absence of the light. A surprise was that different metals required light of dif ...
Downloaded
... We demonstrated the on-off property of the photocurrent according to the isomerization state. Results reveal that the short-wavelength light corresponding to the high-energy absorption band of the colored DAE film generated higher carrier/photon efficiency than did the long-wavelength light correspo ...
... We demonstrated the on-off property of the photocurrent according to the isomerization state. Results reveal that the short-wavelength light corresponding to the high-energy absorption band of the colored DAE film generated higher carrier/photon efficiency than did the long-wavelength light correspo ...
Modern battlefield and new materials for eyes protection
... These three visual effects are of primary concern for aviation experts. This is because they could happen with low-power lasers that are commonly available. The fourth concern, eye damage, is much less likely. It needs specialized equipment not readily available to the general public including terro ...
... These three visual effects are of primary concern for aviation experts. This is because they could happen with low-power lasers that are commonly available. The fourth concern, eye damage, is much less likely. It needs specialized equipment not readily available to the general public including terro ...
Semiconductor Laser Diodes
... • Semiconductor laser diodes are cheap and easy to use compared to other types of lasers. • They can be used for many applications, and have the ability to be produced in a wide range of wavelengths and powers. • The most important electronic consideration is the fact that a precisely controlled cur ...
... • Semiconductor laser diodes are cheap and easy to use compared to other types of lasers. • They can be used for many applications, and have the ability to be produced in a wide range of wavelengths and powers. • The most important electronic consideration is the fact that a precisely controlled cur ...
recent advances - University of St Andrews
... A solid-state polymer laser, though, would be attractive because it could be more compact and robust, and would be better suited for electrical pumping in the future. However, this proved to be a more challenging problem. In the same year as Moses reported a solution laser, one of the present author ...
... A solid-state polymer laser, though, would be attractive because it could be more compact and robust, and would be better suited for electrical pumping in the future. However, this proved to be a more challenging problem. In the same year as Moses reported a solution laser, one of the present author ...
Physics 476LW Advanced Physics Laboratory The Faraday Effect
... 3. Use your data to calculate the ratio e/m for the electron. You will need the SF-59 information at the end of this lab manual. Extensions • When you have finished the above, if you have time and interest, try other variations of the experiment. For example, you might use different currents, or use ...
... 3. Use your data to calculate the ratio e/m for the electron. You will need the SF-59 information at the end of this lab manual. Extensions • When you have finished the above, if you have time and interest, try other variations of the experiment. For example, you might use different currents, or use ...
Kuhnke Laser Shutter DS200X8 - Kendrion Kuhnke Automation GmbH
... Safely trapping the light Kendrion Kuhnke Automation introduces an innovative laser shutter with built-in self-monitoring for highly reliable operation. It matches applications employing laser technology with up 100 watts and matches a wide range of applications in medical technology and ...
... Safely trapping the light Kendrion Kuhnke Automation introduces an innovative laser shutter with built-in self-monitoring for highly reliable operation. It matches applications employing laser technology with up 100 watts and matches a wide range of applications in medical technology and ...
The Setup, Design, and Implementation of a Photoluminescence Experiment on Quantum Wells
... fluorescence coming through the hole was to reflecting back in on itself; once the small bright spot seen on the card was made – via adjusting the partially reflective mirror – to go back into ...
... fluorescence coming through the hole was to reflecting back in on itself; once the small bright spot seen on the card was made – via adjusting the partially reflective mirror – to go back into ...
High power, continuous-wave ytterbium-doped fiber - HAL
... 3 June 2013 | Vol. 21, No. 11 | DOI:10.1364/OE.21.013818 | OPTICS EXPRESS 13818 ...
... 3 June 2013 | Vol. 21, No. 11 | DOI:10.1364/OE.21.013818 | OPTICS EXPRESS 13818 ...
Laser Security
... Note:- for a product to be classified correctly, it must be tested at the maximum output accessible under reasonably foreseeable single-fault conditions (e.g., in the drive circuitry). A non-M class product must pass both Condition 1 and Condition 2 of Table 10 in IEC/EN 60825-1, and an M-class pro ...
... Note:- for a product to be classified correctly, it must be tested at the maximum output accessible under reasonably foreseeable single-fault conditions (e.g., in the drive circuitry). A non-M class product must pass both Condition 1 and Condition 2 of Table 10 in IEC/EN 60825-1, and an M-class pro ...
Large-Area Laser-Lift-Off Processing in
... Abstract Laser lift-off is an enabling technology for microelectronics growth markets such as light emitting diodes, densely packaged semiconductor devices, and flexible displays. For example, thin film transistor structures fabricated on top of polymer layers spun on glass carriers must be delamina ...
... Abstract Laser lift-off is an enabling technology for microelectronics growth markets such as light emitting diodes, densely packaged semiconductor devices, and flexible displays. For example, thin film transistor structures fabricated on top of polymer layers spun on glass carriers must be delamina ...
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.