Optical Time Domain Reflectometry (OTDR)
... for optical fibers [3,4]. OTDR is extensively used in telecommunications to check the integrity of fiber links and to locate possible defects. OTDR exploits the Rayleigh scattering naturally taking place in the core of optical fibers. As the light propagates down a fiber, small material imperfection ...
... for optical fibers [3,4]. OTDR is extensively used in telecommunications to check the integrity of fiber links and to locate possible defects. OTDR exploits the Rayleigh scattering naturally taking place in the core of optical fibers. As the light propagates down a fiber, small material imperfection ...
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... change. It depends in an intricate manner on the electro-optic coefficient of the material and the waveguide structure, and its magnitude varies with the particular RF frequency (usually in an increasing manner with increasing frequency). In lithium niobate, this parameter may range from ~2V to 11V ...
... change. It depends in an intricate manner on the electro-optic coefficient of the material and the waveguide structure, and its magnitude varies with the particular RF frequency (usually in an increasing manner with increasing frequency). In lithium niobate, this parameter may range from ~2V to 11V ...
www.phlam.univ
... The pulse is linearly chirped in the fiber by the combination of group velocity dispersion and self-phase modulation [2]. The stretched pulse is amplified and then compressed by a double grating compressor [3]. Amplifying the stretched pulse rather than the compressed pulse allows for higher energie ...
... The pulse is linearly chirped in the fiber by the combination of group velocity dispersion and self-phase modulation [2]. The stretched pulse is amplified and then compressed by a double grating compressor [3]. Amplifying the stretched pulse rather than the compressed pulse allows for higher energie ...
GPS General Particle Source
... the emitted photon frequency increases and their number decreases ...
... the emitted photon frequency increases and their number decreases ...
Optical Sources - BYU -- ECEn 466 Course Information
... Higher order modes – Larger propagation length – Travel farther into the cladding – Speed increases with distance away from the core (decreasing index of refraction) – Relative difference in propagation speed is less ...
... Higher order modes – Larger propagation length – Travel farther into the cladding – Speed increases with distance away from the core (decreasing index of refraction) – Relative difference in propagation speed is less ...
Volatile Organic Compound Optical Fiber Sensors: A Review
... Evanescent wave sensors usually work in transmissive setups (Figure 6), in which the sensor is connected between the interrogating signal source and the detector, the sensing signal being based on the intensity modulation of the light. Finally, there are other different practical implementations of ...
... Evanescent wave sensors usually work in transmissive setups (Figure 6), in which the sensor is connected between the interrogating signal source and the detector, the sensing signal being based on the intensity modulation of the light. Finally, there are other different practical implementations of ...
Optical coherence tomography (OCT): a review
... profile analogous to an A-mode ultrasound scan. It follows determines the axial from (9) that the spatial extent of width of the point-spread function; therefore, in this onedimensional model the coherence length is an appropriate measure of the axial resolution of the OCT system. In the more genera ...
... profile analogous to an A-mode ultrasound scan. It follows determines the axial from (9) that the spatial extent of width of the point-spread function; therefore, in this onedimensional model the coherence length is an appropriate measure of the axial resolution of the OCT system. In the more genera ...
Miscellaeous features - JLab Tech Notes Home Page
... Free-electron lasers have some characteristics which set them apart from conventional lasers and some which are in common with certain conventional lasers. The small signal gain in a FEL is typically low (<100%). The low gain is advantageous in reducing the number of transverse resonator modes that ...
... Free-electron lasers have some characteristics which set them apart from conventional lasers and some which are in common with certain conventional lasers. The small signal gain in a FEL is typically low (<100%). The low gain is advantageous in reducing the number of transverse resonator modes that ...
Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback
... of optical path length. Concurrently, active linewidth narrowing schemes, such as electronic stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical ...
... of optical path length. Concurrently, active linewidth narrowing schemes, such as electronic stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical ...
OPTIMIZATION OF THE FIBER-OPITC FABRY-PEROT INTERFEROMETER CONSTRUCTION Małgorzata Jędrzejewska-Szczerska,
... about the measurand (equation (8)), as shown in Fig.3. It can be noted that for ∆φ=0 there is no spectral modulation (Fig.3a)). If the phase difference between the interfering beams varies from zero, the function takes the form of the cosine curve (Fig.3b). The spacing of adjacent transmission peak ...
... about the measurand (equation (8)), as shown in Fig.3. It can be noted that for ∆φ=0 there is no spectral modulation (Fig.3a)). If the phase difference between the interfering beams varies from zero, the function takes the form of the cosine curve (Fig.3b). The spacing of adjacent transmission peak ...
Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback.
... of optical path length. Concurrently, active linewidth narrowing schemes, such as electronic stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical ...
... of optical path length. Concurrently, active linewidth narrowing schemes, such as electronic stabilization to a high-finesse, ultrastable vertical cavity [10, 11], or an all-fiber Michelson interferometer [12], have also achieved hertz-level linewidth. However, due to finite bandwidth for electrical ...
On the Limits of Communication over Optical On-Off Keying Channels with Crosstalk
... Abstract—In this paper, we investigate the limits of communication over optical on-off-keying channels with 1-D or 2D crosstalk, where photons are transferable between adjacent time slots or spatial pixels, and the receiver is equipped with single-photon detectors. We observe that high transmission ...
... Abstract—In this paper, we investigate the limits of communication over optical on-off-keying channels with 1-D or 2D crosstalk, where photons are transferable between adjacent time slots or spatial pixels, and the receiver is equipped with single-photon detectors. We observe that high transmission ...
Laser phase and frequency stabilization using an optical resonator
... detection followed by rf phase-sensitive detection of this triplet (carrier plus two phase-modulation sidebands) will in fact produce nominally zero if output and be independent of the resonator/laser detuning. (Basically, the two beat photodiode currents at the if frequency are in anti-phase and ca ...
... detection followed by rf phase-sensitive detection of this triplet (carrier plus two phase-modulation sidebands) will in fact produce nominally zero if output and be independent of the resonator/laser detuning. (Basically, the two beat photodiode currents at the if frequency are in anti-phase and ca ...
Graded Index Fiber
... conversion is known as mode coupling or mixing. Mode coupling analyzed using coupled mode equations from Maxwell's ...
... conversion is known as mode coupling or mixing. Mode coupling analyzed using coupled mode equations from Maxwell's ...
Graphene Plasmonic Metasurfaces to Steer Infrared Light www.nature.com/scientificreports Zubin Li
... substantial variations. This allows us to design graphene metasurfaces to implement anomalous reflection, focusing and non-diffracting Airy beam generation. We envision that such transformative graphene metasurfaces would open up a new paradigm of integrated photonic systems with multifunctional app ...
... substantial variations. This allows us to design graphene metasurfaces to implement anomalous reflection, focusing and non-diffracting Airy beam generation. We envision that such transformative graphene metasurfaces would open up a new paradigm of integrated photonic systems with multifunctional app ...
Mofiz U Ahmed
... analysis shows that the negative refractive index in SRR is maintained within a narrow band of the frequency, which is more narrowed down with the intensity of the laser radiation. From Maxwell’s system of equations, a system of coupled equations descring the nonlinear propagation of laser pulse in ...
... analysis shows that the negative refractive index in SRR is maintained within a narrow band of the frequency, which is more narrowed down with the intensity of the laser radiation. From Maxwell’s system of equations, a system of coupled equations descring the nonlinear propagation of laser pulse in ...
Optical properties of metals and alloys
... Since reflectometry normally deals with the variation of light intensities and is therefore a power measurement, the absolute reflectance coefficients obtained from it are only indirectly linked to the real and imaginary parts of the complex dielectric function, which requires multiple measurements ...
... Since reflectometry normally deals with the variation of light intensities and is therefore a power measurement, the absolute reflectance coefficients obtained from it are only indirectly linked to the real and imaginary parts of the complex dielectric function, which requires multiple measurements ...
damping ring for test the optical stochastic cooling
... In our considerations we used the dipole wiggler for the energy change. For the same reason the second quadrupole wiggler could be used as well. In this case one needs to have the beam optical transformation from pickup to kicker with magnification module equal to one. In this case one can avoid the ...
... In our considerations we used the dipole wiggler for the energy change. For the same reason the second quadrupole wiggler could be used as well. In this case one needs to have the beam optical transformation from pickup to kicker with magnification module equal to one. In this case one can avoid the ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.