Manipulation of two-level quantum systems with narrow transition
... Lately there has been considerable progress in laser manipulation, including slowing, cooling, and trapping of atoms.1–4 Important applications of laser cooling include high-resolution spectroscopy and frequency standards1,2 with cooled and trapped atoms as well as the construction of novel forms of ...
... Lately there has been considerable progress in laser manipulation, including slowing, cooling, and trapping of atoms.1–4 Important applications of laser cooling include high-resolution spectroscopy and frequency standards1,2 with cooled and trapped atoms as well as the construction of novel forms of ...
PPT - Advanced Energy Technology Program
... • Laser-matter interactions and inertial confinement fusion • Thermo-mechanical design of nuclear fusion reactor components • Theoretical space and astrophysical applications Interested students are encouraged to visit ...
... • Laser-matter interactions and inertial confinement fusion • Thermo-mechanical design of nuclear fusion reactor components • Theoretical space and astrophysical applications Interested students are encouraged to visit ...
Micro-machining with ultrashort laser pulses: From
... The edges of the beam with energy density below the threshold for material removal may act on the work piece in an unwanted way by causing thermal damage. A steep limitation of the beam is desirable for a treatment with high quality, therefore. On the other hand, the sharpness of the laser beam may ...
... The edges of the beam with energy density below the threshold for material removal may act on the work piece in an unwanted way by causing thermal damage. A steep limitation of the beam is desirable for a treatment with high quality, therefore. On the other hand, the sharpness of the laser beam may ...
Semiconductor Disk Lasers: Recent Advances in Generation of
... the cavity length in mode-locked laser with continuous wave pumping. To scale up the power of an SDL, it is possible to deploy multiple gain elements in single cavity [9–11]. SDLs can also employ ring cavities [12], but probably due to the added complexity such lasers have not gained much popularity ...
... the cavity length in mode-locked laser with continuous wave pumping. To scale up the power of an SDL, it is possible to deploy multiple gain elements in single cavity [9–11]. SDLs can also employ ring cavities [12], but probably due to the added complexity such lasers have not gained much popularity ...
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 ...
PDF
... cholesteric pitch p can be modified by varying concentration of the additive and is often within the range from 100 nm to 100 µm, thus enabling formation of periodic structures for photonic applications in ultraviolet, visible, and infrared spectral ranges. When CLCs are confined in cells with diffe ...
... cholesteric pitch p can be modified by varying concentration of the additive and is often within the range from 100 nm to 100 µm, thus enabling formation of periodic structures for photonic applications in ultraviolet, visible, and infrared spectral ranges. When CLCs are confined in cells with diffe ...
Sample pages 2 PDF
... Among energy states, the state with the lowest energy is most stable. Therefore, the electrons in semiconductors tend to stay in low energy states. If they are excited by thermal energy, light, or electron beams, the electrons absorb these energies and transit to high energy states. These transition ...
... Among energy states, the state with the lowest energy is most stable. Therefore, the electrons in semiconductors tend to stay in low energy states. If they are excited by thermal energy, light, or electron beams, the electrons absorb these energies and transit to high energy states. These transition ...
Soliton pairs in a fiber laser: from anomalous to normal average
... In great contrast with the anomalous dispersion case studied in Ref. 6, where the soliton pairs spiralled towards a ±π/2 phase-locked state, the dynamical evolution of pulse pairs in the present normal dispersion case is faster in terms of cavity round trips, and the attractor found is characterized ...
... In great contrast with the anomalous dispersion case studied in Ref. 6, where the soliton pairs spiralled towards a ±π/2 phase-locked state, the dynamical evolution of pulse pairs in the present normal dispersion case is faster in terms of cavity round trips, and the attractor found is characterized ...
OSA journals template (MSWORD) - HAL
... compression with such high output energies obtained through self-phase modulation (higher pulse energies with similar durations can be obtained through optical parametric chirped pulse amplification [3], but with significant increase in experimental complexity). The beam quality after compression is ...
... compression with such high output energies obtained through self-phase modulation (higher pulse energies with similar durations can be obtained through optical parametric chirped pulse amplification [3], but with significant increase in experimental complexity). The beam quality after compression is ...
EP23850853
... the high equipment cost. For example, highly accurate gyros, used in airplanes, are prohibitively expensive. Very recently, laser gyros, which are very accurate, have become more attractive as alternative solutions because of their lower cost. ...
... the high equipment cost. For example, highly accurate gyros, used in airplanes, are prohibitively expensive. Very recently, laser gyros, which are very accurate, have become more attractive as alternative solutions because of their lower cost. ...
Raman Spectra of Optically Trapped Microcomplexes
... (a) Near-infrared Raman spectra of single live yeast cells (curve A) and dead yeast cells (curve B) in a batch culture. The acquisition time was 20s with a laser power of ~17mw at 785 nm. Tyr, tyrosine; phe, phenylalanine; def, deformed. (b) Image of the sorted yeast cells in the collection chamber. ...
... (a) Near-infrared Raman spectra of single live yeast cells (curve A) and dead yeast cells (curve B) in a batch culture. The acquisition time was 20s with a laser power of ~17mw at 785 nm. Tyr, tyrosine; phe, phenylalanine; def, deformed. (b) Image of the sorted yeast cells in the collection chamber. ...
Phys. Rev. Lett. 104, 173901 - APS Link Manager
... Active and passive mode locking of lasers are the main methods for obtaining ultrashort light pulses, that nowadays can reach the few femtosecond regime [1,2]. They are based on locking the phases of many axial (longitudinal) modes of a laser that can in certain cases span over most of the visible f ...
... Active and passive mode locking of lasers are the main methods for obtaining ultrashort light pulses, that nowadays can reach the few femtosecond regime [1,2]. They are based on locking the phases of many axial (longitudinal) modes of a laser that can in certain cases span over most of the visible f ...
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 ...
LAB 1 - SIMPLE DIFFRACTION, FOURIER OPTICS AND ACOUSTO
... This will badly blur the image of the laser beam on the pinhole and allow some laser light to get through the pinhole when the spatial filter is placed in the optical setup. Place the spatial filter on a base, and put it in the path of the laser beam with the back (iris side) facing the laser. Adju ...
... This will badly blur the image of the laser beam on the pinhole and allow some laser light to get through the pinhole when the spatial filter is placed in the optical setup. Place the spatial filter on a base, and put it in the path of the laser beam with the back (iris side) facing the laser. Adju ...
Lecture 11: Semiconductor lasers and light
... Light-emitting diodes (LEDs) • The light output of an LED is the spontaneous emission generated by radiative recombination of electrons and holes in the active region of the diode under forward bias. • The semiconductor material is direct-bandgap to ensure high quantum efficiency, often III-V semic ...
... Light-emitting diodes (LEDs) • The light output of an LED is the spontaneous emission generated by radiative recombination of electrons and holes in the active region of the diode under forward bias. • The semiconductor material is direct-bandgap to ensure high quantum efficiency, often III-V semic ...
CavityRingDown_Acous..
... Mode Formation in Optical Cavities (Mode: 1.The characteristic of the propagation of light through a waveguide that can be designated by a radiation pattern in a plane transverse to the direction of travel. 2.The state of an oscillating system such as a laser that corresponds to a particular field p ...
... Mode Formation in Optical Cavities (Mode: 1.The characteristic of the propagation of light through a waveguide that can be designated by a radiation pattern in a plane transverse to the direction of travel. 2.The state of an oscillating system such as a laser that corresponds to a particular field p ...
Two-Photon Excited Fluorescence Microscopy - Spectra
... from a femtosecond pulsed laser. When the solution is excited by a one- photon process at 405 nm, fluorescence is generated everywhere along the optical axis. Upon twophoton absorption at 800 nm, fluorescence is observed exclusively at the focal point of the objective. By using high numerical apertu ...
... from a femtosecond pulsed laser. When the solution is excited by a one- photon process at 405 nm, fluorescence is generated everywhere along the optical axis. Upon twophoton absorption at 800 nm, fluorescence is observed exclusively at the focal point of the objective. By using high numerical apertu ...
Optics and Quantum Electronics - Research Laboratory of Electronics
... Optical parametric chirped pulse amplification (OPCPA) is valuable not only as a means to push the limits of high peak power pulse generation at wavelengths at which laser amplification has not been developed, but as the only demonstrated technology for producing few-cycle pulses beyond the terawatt ...
... Optical parametric chirped pulse amplification (OPCPA) is valuable not only as a means to push the limits of high peak power pulse generation at wavelengths at which laser amplification has not been developed, but as the only demonstrated technology for producing few-cycle pulses beyond the terawatt ...
Improvement by laser quenching of an `atom diode`: a
... than the symbol size. In summary, a quenching laser has been included in an atom diode laser device. Using quenching to force decay to the ground state after crossing the diode provides a significant improvement over previous schemes based on small direct spontaneous decay. With quenching, possible ...
... than the symbol size. In summary, a quenching laser has been included in an atom diode laser device. Using quenching to force decay to the ground state after crossing the diode provides a significant improvement over previous schemes based on small direct spontaneous decay. With quenching, possible ...
Notebook and Assignment Guidelines
... In this part of the lab, you will test your equation by using it to calculate the wavelength of a laser light shining through small slits. The directions for this section of the lab will need to be followed exactly in order to prevent injury or damage to the equipment. Be sure to ask your teacher if ...
... In this part of the lab, you will test your equation by using it to calculate the wavelength of a laser light shining through small slits. The directions for this section of the lab will need to be followed exactly in order to prevent injury or damage to the equipment. Be sure to ask your teacher if ...
Laser beam collimation testing: reliable results in seconds! New
... front on itself. The light beam being tested is split into two waves which are shifted laterally to one another, producing the shear. The division and shifting of the wave fronts is a result of the reflectivity on the two surfaces of an extremely flat plate, called the shear plate. The two partial w ...
... front on itself. The light beam being tested is split into two waves which are shifted laterally to one another, producing the shear. The division and shifting of the wave fronts is a result of the reflectivity on the two surfaces of an extremely flat plate, called the shear plate. The two partial w ...
Diffraction
... Place the spatial filter on a base, and put it in the path of the laser beam with the back (iris side) facing the laser. Adjust the height of the spatial filter so that the beam passes through the center of the back iris. Fully open the iris and you should notice a back-reflection originating from ...
... Place the spatial filter on a base, and put it in the path of the laser beam with the back (iris side) facing the laser. Adjust the height of the spatial filter so that the beam passes through the center of the back iris. Fully open the iris and you should notice a back-reflection originating from ...
PDF hosted at the Radboud Repository of the Radboud University
... wavelength modulation spectroscopy (WMS) [26]. Alternatively, the sensitivity can be improved by using cavity-enhanced absorption methods, such as cavity ring down spectroscopy (CRDS) [18] and integrated cavity output spectroscopy (ICOS) [27]. CRDS involves coupling the laser beam with a high-finess ...
... wavelength modulation spectroscopy (WMS) [26]. Alternatively, the sensitivity can be improved by using cavity-enhanced absorption methods, such as cavity ring down spectroscopy (CRDS) [18] and integrated cavity output spectroscopy (ICOS) [27]. CRDS involves coupling the laser beam with a high-finess ...
Cavity Enhanced Reflector Based Hybrid Silicon Laser
... It is possible though to obtain high reflection using short gratings (∼20µm) by making only a minor adjustment to the grating. Due to their proximity, there is, albeit limited, coupling between the active and the silicon waveguide, so light will leak from the first into the latter. At first sight th ...
... It is possible though to obtain high reflection using short gratings (∼20µm) by making only a minor adjustment to the grating. Due to their proximity, there is, albeit limited, coupling between the active and the silicon waveguide, so light will leak from the first into the latter. At first sight th ...
Fiber optics for laser cooling and trapping
... The major focus has shifted from primarily cooling down atoms as close as possible to absolute zero and towards the experimental investigation of these already cooled atoms. Fiber-optical components designed for the accomplishment of these goals assist researchers all over the world in concentrating ...
... The major focus has shifted from primarily cooling down atoms as close as possible to absolute zero and towards the experimental investigation of these already cooled atoms. Fiber-optical components designed for the accomplishment of these goals assist researchers all over the world in concentrating ...
Laser
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.