Electromagnetic Wave Ray Optics Wave Optics
... square of the distance hence the signal becomes weak as the distance increases, which limits the range of transmission by this mode. - The ground wave attenuation increases with frequency, so the transmission via this mode is in practice possible only for frequencies up to about 1500 kHz or waveleng ...
... square of the distance hence the signal becomes weak as the distance increases, which limits the range of transmission by this mode. - The ground wave attenuation increases with frequency, so the transmission via this mode is in practice possible only for frequencies up to about 1500 kHz or waveleng ...
Generation of quasistanding hypersonic wave in stimulated brillouin
... the quadratic law with the length I and the intensity P+=&A+ increasing: G- (Z'+l)' ( ~ , - p + l for a monochromatic pumping) but decreases with the spectrum width A+ increasing as G - ( A + / R ~ ) - ~ .A typical estimate gives G- ~0.01-10, which is one or two orders of magnitude lower than G,. Th ...
... the quadratic law with the length I and the intensity P+=&A+ increasing: G- (Z'+l)' ( ~ , - p + l for a monochromatic pumping) but decreases with the spectrum width A+ increasing as G - ( A + / R ~ ) - ~ .A typical estimate gives G- ~0.01-10, which is one or two orders of magnitude lower than G,. Th ...
P5872 - LD Didactic
... out flowing water jet. Because of repeated total reflections the light can not leave the jet and it is forced to follow the water jet. It is expected that the jet remains completely darken unless the surface contains small disturbances. This leads to a certain loss of light and it appears illuminate ...
... out flowing water jet. Because of repeated total reflections the light can not leave the jet and it is forced to follow the water jet. It is expected that the jet remains completely darken unless the surface contains small disturbances. This leads to a certain loss of light and it appears illuminate ...
JMacePaper.doc
... must be painstakingly aligned at proper distances for the laser to function optimally [1]. The purpose of these mirrors is to give the cavity a longer effective length, giving more stimulated emission and, therefore, a more intense output. This makes the cavity an oscillator with a provision for pos ...
... must be painstakingly aligned at proper distances for the laser to function optimally [1]. The purpose of these mirrors is to give the cavity a longer effective length, giving more stimulated emission and, therefore, a more intense output. This makes the cavity an oscillator with a provision for pos ...
Measurement of radiation-pressure
... Second-generation gravitational wave 共GW兲 interferometers are anticipated to have circulating power in excess of 0.5 MW in the Fabry-Perot arm cavities 关1兴. High circulating power is needed to reduce the effect of photon shot noise, which limits the performance of these instruments at frequencies ab ...
... Second-generation gravitational wave 共GW兲 interferometers are anticipated to have circulating power in excess of 0.5 MW in the Fabry-Perot arm cavities 关1兴. High circulating power is needed to reduce the effect of photon shot noise, which limits the performance of these instruments at frequencies ab ...
Optical Component Characterization: A Linear Systems Approach
... The success of chromatic dispersion and group delay in the characterization of fiber links has led to the adoption of these same parameters as characteristics of DWDM filters and components. Unfortunately, the approximation of the chromatic dispersion as a constant over a channel does NOT hold for t ...
... The success of chromatic dispersion and group delay in the characterization of fiber links has led to the adoption of these same parameters as characteristics of DWDM filters and components. Unfortunately, the approximation of the chromatic dispersion as a constant over a channel does NOT hold for t ...
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Motion and Optical Flow
... Actual and Apparent Motion • If these assumptions violated, can still use the same methods – apparent motion • Result of algorithm is optical flow (vs. ideal motion field) • Most obvious effects: – Aperture problem: can only get motion perpendicular to edges ...
... Actual and Apparent Motion • If these assumptions violated, can still use the same methods – apparent motion • Result of algorithm is optical flow (vs. ideal motion field) • Most obvious effects: – Aperture problem: can only get motion perpendicular to edges ...
Silicon Photonics Optical Transceiver for High-speed, High
... This section describes the key technologies for our prototype optical transceiver. For this prototype, we used a microring optical modulator (to convert the electrical binary signal to an optical intensity-modulated signal), which has a small footprint and a low power consumption, as an optical modu ...
... This section describes the key technologies for our prototype optical transceiver. For this prototype, we used a microring optical modulator (to convert the electrical binary signal to an optical intensity-modulated signal), which has a small footprint and a low power consumption, as an optical modu ...
High speed hybrid silicon evanescent Mach
... structure. The improvement in modulation efficiency is due to the alignment between the IIIV crystal facet and waveguide direction such that the Pockels effect adds to the other sources of phase modulation [10]. All three curves in Fig. 2 have a highest transmission at bias other than zero due to fa ...
... structure. The improvement in modulation efficiency is due to the alignment between the IIIV crystal facet and waveguide direction such that the Pockels effect adds to the other sources of phase modulation [10]. All three curves in Fig. 2 have a highest transmission at bias other than zero due to fa ...
Technical Article
... power level for SS-OCT is expected to be similar to that for TD-OCT. In FD-OCT, where the reference arm power is dispersed onto M photodetectors, the total reference power required to achieve shot noise-limited detection on all receivers simultaneously is more than that required for SS-OCT and TD-OC ...
... power level for SS-OCT is expected to be similar to that for TD-OCT. In FD-OCT, where the reference arm power is dispersed onto M photodetectors, the total reference power required to achieve shot noise-limited detection on all receivers simultaneously is more than that required for SS-OCT and TD-OC ...
Synchronization of Micromechanical Oscillators Using Light
... resulting optical resonance splits into a symmetric, lower frequency mode (fig. 1c) and an anti-symmetric higher frequency mode (fig. 1d). Light coupled to any of these supermodes interacts with both the L and the R cavities and therefore we can choose to pump light only into one of the cavities (th ...
... resulting optical resonance splits into a symmetric, lower frequency mode (fig. 1c) and an anti-symmetric higher frequency mode (fig. 1d). Light coupled to any of these supermodes interacts with both the L and the R cavities and therefore we can choose to pump light only into one of the cavities (th ...
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.