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Ultrashort free-carrier lifetime in low-loss silicon
... Nonlinear optical processes in silicon such as Raman scattering [1–16] and oscillation [17– 21], self- [22–26] and cross-phase modulation [27], and four-wave mixing [28–37] have enabled a number of demonstrations of devices that can operate at low powers, have small, micron-scale footprints, and can ...
... Nonlinear optical processes in silicon such as Raman scattering [1–16] and oscillation [17– 21], self- [22–26] and cross-phase modulation [27], and four-wave mixing [28–37] have enabled a number of demonstrations of devices that can operate at low powers, have small, micron-scale footprints, and can ...
Strong Dispersive and Nonlinear Optical Properties of
... where ∆ω is the pulse half-bandwidth. Fractional group delays greater than unity can be obtained by use of more resonators. However, dispersive effects accumulate and eventually severely distort pulses. For a desired net fractional delay, these phase errors might be reduced by relaxing the fractional ...
... where ∆ω is the pulse half-bandwidth. Fractional group delays greater than unity can be obtained by use of more resonators. However, dispersive effects accumulate and eventually severely distort pulses. For a desired net fractional delay, these phase errors might be reduced by relaxing the fractional ...
Practical uses of femtosecond laser micro
... micro-chemistry. Laser ablation, because of its non-contact nature, allows the micromachining and surface patterning of materials with minimal mechanical and thermal deformation. It is now well known that for many of these applications, the femtosecond regime offers advantages over the nanosecond re ...
... micro-chemistry. Laser ablation, because of its non-contact nature, allows the micromachining and surface patterning of materials with minimal mechanical and thermal deformation. It is now well known that for many of these applications, the femtosecond regime offers advantages over the nanosecond re ...
Fabrication and Application of Phase only Holograms for High
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
Chapter 5 Experimental Apparatus II
... to suppression of the absorption of rescattered light in the MOT. The second-hand absorption of photons that have already been spontaneously scattered by MOT atoms, or “radiation trapping,” leads to temperature and density limitations in free-space MOTs [Sesko91; Ellinger94]. These rescattering even ...
... to suppression of the absorption of rescattered light in the MOT. The second-hand absorption of photons that have already been spontaneously scattered by MOT atoms, or “radiation trapping,” leads to temperature and density limitations in free-space MOTs [Sesko91; Ellinger94]. These rescattering even ...
Introduction to Fiber Optic Sensing
... the simplest to measure, as only one source and detector are required. Some intrinsic fiber optic sensors can provide distributed sensing along the entire length of the fiber. Within the division of intrinsic sensors, the most common types of technology are scattering and FBG based techniques, and ...
... the simplest to measure, as only one source and detector are required. Some intrinsic fiber optic sensors can provide distributed sensing along the entire length of the fiber. Within the division of intrinsic sensors, the most common types of technology are scattering and FBG based techniques, and ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.