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WDM Concepts and Components
... • Number of lasers into simple power coupler; each emit one fixed wavelength • Expensive (multiple lasers) • Sources must be carefully controlled to avoid wavelength drift ...
... • Number of lasers into simple power coupler; each emit one fixed wavelength • Expensive (multiple lasers) • Sources must be carefully controlled to avoid wavelength drift ...
1.1 Objectives
... of the laser beam. Self-focusing is self-induced (Kerr) lens effect. In the case of long pulses or continuous wave laser radiation, self-focusing phenomenon is responsible for the damage of optical elements [2] and appears to be the main limiting factor in the development and production of high powe ...
... of the laser beam. Self-focusing is self-induced (Kerr) lens effect. In the case of long pulses or continuous wave laser radiation, self-focusing phenomenon is responsible for the damage of optical elements [2] and appears to be the main limiting factor in the development and production of high powe ...
Correlated-Photon Experiments for Undergraduate Labs
... the down-conversion crystal. You can order the down-conversion crystal once you know the rough wavelength of your laser. We recommend type-I downconversion crystals. The main specification is the phase-matching angle. Even this parameter is not critical because one can tilt the crystal if it is not ...
... the down-conversion crystal. You can order the down-conversion crystal once you know the rough wavelength of your laser. We recommend type-I downconversion crystals. The main specification is the phase-matching angle. Even this parameter is not critical because one can tilt the crystal if it is not ...
catalogue laser pointers
... For the classification of the laser systems: only in perfect conditions and supplied with DC power supply, the system can be specified in the safety class, according to new regulations valid as from 01/01/04. Laser according to EN 60825-1, Edition 4 (Laser Safety) By electrostatic charges take measu ...
... For the classification of the laser systems: only in perfect conditions and supplied with DC power supply, the system can be specified in the safety class, according to new regulations valid as from 01/01/04. Laser according to EN 60825-1, Edition 4 (Laser Safety) By electrostatic charges take measu ...
Lab 14 - FIber Optics Principles and Position Sensor
... Using a large area photodetector, measure the power of the He-Ne laser. Before proceeding make sure that the detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fibe ...
... Using a large area photodetector, measure the power of the He-Ne laser. Before proceeding make sure that the detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fibe ...
Efficient electromagnetically induced transparency COMMUNICATIONS
... and refractive index of a probe field whose transition involves the third level. Particularly, the probe field is not absorbed at line center due to coherence and destructive quantum interference, so that an optically thick medium can become transparent. This is called electromagnetically induced tr ...
... and refractive index of a probe field whose transition involves the third level. Particularly, the probe field is not absorbed at line center due to coherence and destructive quantum interference, so that an optically thick medium can become transparent. This is called electromagnetically induced tr ...
Direct welding of fused silica with femtosecond fiber laser
... of applications, including life science, sensing, optoelectronics and MEMS packaging. In this paper, methods of welding and sealing optically transparent materials using a femtosecond fiber laser (1 MHz & 1 µm) were demonstrated which overcome the limit of small area welding of optical materials fro ...
... of applications, including life science, sensing, optoelectronics and MEMS packaging. In this paper, methods of welding and sealing optically transparent materials using a femtosecond fiber laser (1 MHz & 1 µm) were demonstrated which overcome the limit of small area welding of optical materials fro ...
DFB Quantum Cascade Laser Arrays The Harvard community has
... broadband gain, with full-width at half-maximum (FWHM) of more than 300 cm , enabling wide wavelength coverage for spectroscopic applications [6]. The mid-infrared spectral region is important, among other reasons, for chemical sensing and analysis. Many gas- and liquid-phase chemicals have characte ...
... broadband gain, with full-width at half-maximum (FWHM) of more than 300 cm , enabling wide wavelength coverage for spectroscopic applications [6]. The mid-infrared spectral region is important, among other reasons, for chemical sensing and analysis. Many gas- and liquid-phase chemicals have characte ...
Beyond Snel`s law: Refraction of a nano-beam of light.
... optical phenomena. When light wave is transmitted from one optical medium into another at an oblique angle, its direction of propagation changes. If the light is a wide plane wave incident on a relatively large and flat interface of two different isotropic media, the change of wave direction is well ...
... optical phenomena. When light wave is transmitted from one optical medium into another at an oblique angle, its direction of propagation changes. If the light is a wide plane wave incident on a relatively large and flat interface of two different isotropic media, the change of wave direction is well ...
... Here n(qp) is the refractive index at probe frequency qp (rad s-1), jc j2 is the square of the Rabi frequency for the coupling laser and varies linearly with intensity, m13 is the electric dipole matrix element between states | 1i and | 3i, N is the atomic density, and e0 is the permittivity of fre ...
Get
... In conventional MPP, the optimal resolution (the minimum distance between resolvable features) and minimum feature sizes (the smallest individual feature) are closely linked, as the fabrication process is point-by-point, and generally both can be ~100nm. However, in the DMD-based approach that is pr ...
... In conventional MPP, the optimal resolution (the minimum distance between resolvable features) and minimum feature sizes (the smallest individual feature) are closely linked, as the fabrication process is point-by-point, and generally both can be ~100nm. However, in the DMD-based approach that is pr ...
Hyperbolic Secant Squared Pulse Shape
... So, to manipulate light, we must add or subtract spectral-phase terms. For example, to eliminate the linear chirp (second-order spectral phase), we must design an optical device whose second-order spectral phase cancels that of the pulse: ...
... So, to manipulate light, we must add or subtract spectral-phase terms. For example, to eliminate the linear chirp (second-order spectral phase), we must design an optical device whose second-order spectral phase cancels that of the pulse: ...
Picosecond resolution soft x-ray laser plasma
... of the probe beam. This constitutes the main motivation for pursuing soft x-ray laser interferometry. Soft x-ray lasers with wavelengths corresponding to critical densities in the range of 5 × 1023 − 5 × 1024 cm−3 , can potentially probe plasmas with densities up to two orders of magnitude larger t ...
... of the probe beam. This constitutes the main motivation for pursuing soft x-ray laser interferometry. Soft x-ray lasers with wavelengths corresponding to critical densities in the range of 5 × 1023 − 5 × 1024 cm−3 , can potentially probe plasmas with densities up to two orders of magnitude larger t ...
Digital High-Speed Optical Systems Interconnections for
... Much of the COSt and complexity in telecommunications syst~rns result because the received. signals are at low Ims. which is a consequence of the loss that results when repeaters are spaced at maximum distances. With the shon-distance and small.signal-loss characteristics of most interconnection app ...
... Much of the COSt and complexity in telecommunications syst~rns result because the received. signals are at low Ims. which is a consequence of the loss that results when repeaters are spaced at maximum distances. With the shon-distance and small.signal-loss characteristics of most interconnection app ...
Through the Looking Glass
... absorption) can be used to produce a refractive-index grating. The material itself can be a solid, liquid, gas, or plasma or more exotic systems such as liquid crystals, dielectric particles within a liquid, gaseous bubbles, or bulk plasma within a solid. In this article we will discuss two types of ...
... absorption) can be used to produce a refractive-index grating. The material itself can be a solid, liquid, gas, or plasma or more exotic systems such as liquid crystals, dielectric particles within a liquid, gaseous bubbles, or bulk plasma within a solid. In this article we will discuss two types of ...
Final Report DURIP AFOSR Grant FA9550-06-1
... capabilities for efficient laser initiation and radiofrequency sustainment of plasmas and diagnostics in air, as well as near microwave windows and on cathode surfaces as part of the MURI on Nano-physics of Electron Emission and Breakdown for High Power Microwaves. Our current research on AFOSR Gran ...
... capabilities for efficient laser initiation and radiofrequency sustainment of plasmas and diagnostics in air, as well as near microwave windows and on cathode surfaces as part of the MURI on Nano-physics of Electron Emission and Breakdown for High Power Microwaves. Our current research on AFOSR Gran ...
Laser Linewidth Characterization
... The two fields are scaled such that their magnitudes squared are optical powers (i.e. P(t) = |E(t)|2). The optical field frequencies and phases are designated by ν and φ(t). If either field were separately detected on a photodetector, the resulting photocurrent would follow only the power variations ...
... The two fields are scaled such that their magnitudes squared are optical powers (i.e. P(t) = |E(t)|2). The optical field frequencies and phases are designated by ν and φ(t). If either field were separately detected on a photodetector, the resulting photocurrent would follow only the power variations ...
Sodium vapor cell laser guide star experiments for continuous wave
... version of the unshifted beam, producing a beat note at the offset frequency with an RF bandwidth twice the optical linewidth of the beam. With this method, the optical linewidth of a single-mode laser can be measured in the electric domain with a RF spectrum analyzer. The implementation of this tec ...
... version of the unshifted beam, producing a beat note at the offset frequency with an RF bandwidth twice the optical linewidth of the beam. With this method, the optical linewidth of a single-mode laser can be measured in the electric domain with a RF spectrum analyzer. The implementation of this tec ...
1489_1.pdf
... As discussed, although the best SNR is obtained when the detection and generation spots are superimposed, the detection should be separated from the generation by a certain distance. On the contrary, the depth evaluation becomes very difficult if on uses too wide separation (too large incident and d ...
... As discussed, although the best SNR is obtained when the detection and generation spots are superimposed, the detection should be separated from the generation by a certain distance. On the contrary, the depth evaluation becomes very difficult if on uses too wide separation (too large incident and d ...
Self-Organization, Broken Symmetry, and Lasing in an Atomic Vapor:
... The generation of coherent short-wavelength radiation from relativistic particle beams often requires the efficient direction reversal of optical radiation such as occurs in the free-electron laser. One efficient strategy for implementing this idea is to backdiffract pump radiation from a moving ato ...
... The generation of coherent short-wavelength radiation from relativistic particle beams often requires the efficient direction reversal of optical radiation such as occurs in the free-electron laser. One efficient strategy for implementing this idea is to backdiffract pump radiation from a moving ato ...
Interference
... Thomas Young, 1805. Used the sun, but an additional pinhole creates a (small) source with spatial coherence ...
... Thomas Young, 1805. Used the sun, but an additional pinhole creates a (small) source with spatial coherence ...
No Slide Title
... Solid state laser materials? Dilute atomic gases (microwave cavity) ? dephasing rate ~ 10-3 x dipole coupling (reduce further by starting with atomic BEC) Undoubtedly more serious problem is to have a thermalised equilibrium system; high quality cavities; more theory needed to model non-equilibrium ...
... Solid state laser materials? Dilute atomic gases (microwave cavity) ? dephasing rate ~ 10-3 x dipole coupling (reduce further by starting with atomic BEC) Undoubtedly more serious problem is to have a thermalised equilibrium system; high quality cavities; more theory needed to model non-equilibrium ...
Torsional Aluminum electrostatic light modulators
... photons at the wavelength of high-low energy electron transition, the electrons would be stimulated to make the transition to form more photons in that wavelength. The two reflective mirrors placed at the opposite ends of the active luminescent region forms a Fabry-Perot resonator (spacing ...
... photons at the wavelength of high-low energy electron transition, the electrons would be stimulated to make the transition to form more photons in that wavelength. The two reflective mirrors placed at the opposite ends of the active luminescent region forms a Fabry-Perot resonator (spacing ...
Orientation of Nd3+ dipoles in yttrium aluminum garnet: Experiment
... checked that the two perpendicular ordinary and extraordinary polarizations correspond to the two spatially separated modes inside the cavity and that no significant cross coupling resulting in forked eigenstate operation %19& was induced inside the Nd:YAG crystal !which imposes a specific crystal o ...
... checked that the two perpendicular ordinary and extraordinary polarizations correspond to the two spatially separated modes inside the cavity and that no significant cross coupling resulting in forked eigenstate operation %19& was induced inside the Nd:YAG crystal !which imposes a specific crystal o ...
MPE Tutorial Multiphoton Excitation Microscopy 5100 Patrick Henry Drive
... Although two-photon fluorescence using a cw laser is possible, excitation by a Gaussian pulse with a pulsewidth (τ) of 200 fsec (1.0 fs = 1.0x10-15 sec) and a pulse frequency (f) of 80 MHz increases the two-photon absorption rate by a factor of 0.56 (1/τf), or 35,000! Using this relationship, it fol ...
... Although two-photon fluorescence using a cw laser is possible, excitation by a Gaussian pulse with a pulsewidth (τ) of 200 fsec (1.0 fs = 1.0x10-15 sec) and a pulse frequency (f) of 80 MHz increases the two-photon absorption rate by a factor of 0.56 (1/τf), or 35,000! Using this relationship, it fol ...
Laser
![](https://commons.wikimedia.org/wiki/Special:FilePath/Military_laser_experiment.jpg?width=300)
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.