Fiber optic sensor network for the monitoring of civil
... The security of civil engineering works demands a periodical monitoring of the structures. The current methods (such as triangulation, water levels, vibrating strings or mechanical extensometers) are often of tedious application and require the intervention of specialized operators. The resulting co ...
... The security of civil engineering works demands a periodical monitoring of the structures. The current methods (such as triangulation, water levels, vibrating strings or mechanical extensometers) are often of tedious application and require the intervention of specialized operators. The resulting co ...
WDM and DWDM Multiplexing
... Channel spacing reduced to 1.6 nm and less Cost effective way of increasing capacity without replacing fibre Commercial systems available with capacities of 32 channels and upwards; > 80 Gb/s per fibre Allows new optical network topologies, for example high speed metropolitian rings Optica ...
... Channel spacing reduced to 1.6 nm and less Cost effective way of increasing capacity without replacing fibre Commercial systems available with capacities of 32 channels and upwards; > 80 Gb/s per fibre Allows new optical network topologies, for example high speed metropolitian rings Optica ...
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 ...
full text pdf
... The practical execution of WDD systems needs an efficient method for extracting light of one wavelength from light containing a number of other different discrete wavelengths that are assumed to be already propagating in a fibre. The operation of fibre filters typically involves energy transfer over ...
... The practical execution of WDD systems needs an efficient method for extracting light of one wavelength from light containing a number of other different discrete wavelengths that are assumed to be already propagating in a fibre. The operation of fibre filters typically involves energy transfer over ...
Adaptive optics enhanced simultaneous en-face
... is comparable to that obtained using SLO, but depth resolution is significantly higher, since it can reach values of just a few microns depending on the bandwidth of the light source used. The high depth resolution of OCT images allowed the development of novel diagnosis methods, such as the follow- ...
... is comparable to that obtained using SLO, but depth resolution is significantly higher, since it can reach values of just a few microns depending on the bandwidth of the light source used. The high depth resolution of OCT images allowed the development of novel diagnosis methods, such as the follow- ...
ABSTRACT Dissertation: STUDIES OF
... micrometer scale, which is in the visible light range. We know that scattering and diffraction happen when the object size is on the same order of the impinging light wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from ...
... micrometer scale, which is in the visible light range. We know that scattering and diffraction happen when the object size is on the same order of the impinging light wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from ...
Applied Fiber Optic Measurement for Geohydraulic Engineering
... experiment the influence of temperature on the system was reduced and the results indicated, that this method offers high response to pressure. The experiment was carried out with 1/21r TN cells and 3/21r twisted STN cells ([13]). The authors suggest for this gauge potential applications for pipelin ...
... experiment the influence of temperature on the system was reduced and the results indicated, that this method offers high response to pressure. The experiment was carried out with 1/21r TN cells and 3/21r twisted STN cells ([13]). The authors suggest for this gauge potential applications for pipelin ...
IOSR Journal of Applied Physics (IOSR-JAP)
... By detecting analytes in their natural form, label-free detection removes the experimental uncertainty induced by the effect of the label and in general it measures the refractive index change (RI) induced by molecular interactions. The RI change is related to the sample concentration, while the det ...
... By detecting analytes in their natural form, label-free detection removes the experimental uncertainty induced by the effect of the label and in general it measures the refractive index change (RI) induced by molecular interactions. The RI change is related to the sample concentration, while the det ...
K.C. Neuman and S.M. Block, "Optical Trapping"
... of a laser), the second component of the optical force, the gradient force, must be considered. The gradient force, as the name suggests, arises from the fact that a dipole in an inhomogeneous electric field experiences a force in the direction of the field gradient.67 In an optical trap, the laser ...
... of a laser), the second component of the optical force, the gradient force, must be considered. The gradient force, as the name suggests, arises from the fact that a dipole in an inhomogeneous electric field experiences a force in the direction of the field gradient.67 In an optical trap, the laser ...
Optical Comms 2004 (Summer)
... Loss mechanisms in a Silica Optical Fibre Intrinsic absorption loss: Intrinsic absorption is caused by the interaction of the light with one or more of the components of the glass itself. For silica glass there is a low loss window between 800 and 1600 nm where intrinsic absorption is negligible, by ...
... Loss mechanisms in a Silica Optical Fibre Intrinsic absorption loss: Intrinsic absorption is caused by the interaction of the light with one or more of the components of the glass itself. For silica glass there is a low loss window between 800 and 1600 nm where intrinsic absorption is negligible, by ...
ABSTRACT Title of Document:
... Typically, commercial FSO systems operate in windows around 850 nm and 1550 nm. Since these wavelengths are also used in fiber optic communications, standard components can be used lowering cost. There are other transmission windows available in the ranges between 3-5 µm and 8-14 µm, but the availa ...
... Typically, commercial FSO systems operate in windows around 850 nm and 1550 nm. Since these wavelengths are also used in fiber optic communications, standard components can be used lowering cost. There are other transmission windows available in the ranges between 3-5 µm and 8-14 µm, but the availa ...
Soliton Self-Frequency Shift Cancellation in
... we launched optical pulses into the PCF. The laser source used in the experiments was a mode-locked Ti:sapphire system emitting 200-fs pulses at a wavelength of 0.86 m. The fiber length was progressively reduced from 4 to 0.5 m, and the output spectrum was recorded for each length with an optical s ...
... we launched optical pulses into the PCF. The laser source used in the experiments was a mode-locked Ti:sapphire system emitting 200-fs pulses at a wavelength of 0.86 m. The fiber length was progressively reduced from 4 to 0.5 m, and the output spectrum was recorded for each length with an optical s ...
Plasmonic Nearfield Scanning Probe with High Transmission
... the wavelength of 365 nm (Spectra Physics) was coupled into the NSOM tip to expose the positive photoresist (IX965G, JSR Microelectronics Inc.) on a Si substrate (Figure 4a). By scanning the plasmonic NSOM probe on the top surface of the photoresist with an input laser power of 0.008 mW, a recorded ...
... the wavelength of 365 nm (Spectra Physics) was coupled into the NSOM tip to expose the positive photoresist (IX965G, JSR Microelectronics Inc.) on a Si substrate (Figure 4a). By scanning the plasmonic NSOM probe on the top surface of the photoresist with an input laser power of 0.008 mW, a recorded ...
Motion of hot spots in smoothed beams
... This technique of polarization smoothing11 decreases the fraction of intensities that are larger than the averaged intensity, the instantaneous contrast also being reduced, by a factor 1/A2. A third solution would be to reduce the interaction time between hot spots (high laser intensities) and plasm ...
... This technique of polarization smoothing11 decreases the fraction of intensities that are larger than the averaged intensity, the instantaneous contrast also being reduced, by a factor 1/A2. A third solution would be to reduce the interaction time between hot spots (high laser intensities) and plasm ...
A new approach for retrieving the UV–vis optical properties of
... N. Bluvshtein et al.: A new approach for retrieving the UV–vis optical properties of ambient aerosols For the 390 to 420 nm cavity (BBCES-407), we use a lightemitting diode (LED) centered at 407.1 nm with a measured optical power output of 0.450 W (M405D2, Thorlabs, Newton, NJ, USA). The LED is tem ...
... N. Bluvshtein et al.: A new approach for retrieving the UV–vis optical properties of ambient aerosols For the 390 to 420 nm cavity (BBCES-407), we use a lightemitting diode (LED) centered at 407.1 nm with a measured optical power output of 0.450 W (M405D2, Thorlabs, Newton, NJ, USA). The LED is tem ...
Continuous wave Nd:YAG channel waveguide laser produced by
... 1. Introduction Optical waveguides offer compact confinement of light propagation down to dimensions of a few micrometers; as a result, the optical intensities within these small volumes reach much higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to th ...
... 1. Introduction Optical waveguides offer compact confinement of light propagation down to dimensions of a few micrometers; as a result, the optical intensities within these small volumes reach much higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to th ...
Theory of optical pulse propagation, dispersive and nonlinear effects
... nonlinear phase shift. For a positive dispersion, k2 > 0, this effect smoothens the structure in Fig. IV-37 and linearises the temporal chirp, leading thereby to a better quality of the compressed pulses 2 . For a propagation length in the nonlinear medium that satisfies zNL < LD, however, Eq. (IV-1 ...
... nonlinear phase shift. For a positive dispersion, k2 > 0, this effect smoothens the structure in Fig. IV-37 and linearises the temporal chirp, leading thereby to a better quality of the compressed pulses 2 . For a propagation length in the nonlinear medium that satisfies zNL < LD, however, Eq. (IV-1 ...
TIE-41 Large Optical Glass Blanks
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
... After a first inspection for striae, bubbles and inclusions, the glass blank will be fineannealed. This is the most time-consuming process in the production of large optical glass blanks. The fine-annealing process determines the final refractive index, the optical homogeneity and the stress birefri ...
Free-space optical communications have distinct advantages over
... Every communication system has as a goal to transfer information from the sender to one or more receivers. The information is first superimposed onto an electromagnetic wave (carrier) and then the modulated carrier is transmitted to the destination. The objective of the receiver is to demodulate the ...
... Every communication system has as a goal to transfer information from the sender to one or more receivers. The information is first superimposed onto an electromagnetic wave (carrier) and then the modulated carrier is transmitted to the destination. The objective of the receiver is to demodulate the ...
D12 in docx
... The strategy of PHOME towards achieving truly three-dimensional (and bulk) photonic metamaterials has been to follow two fabrication routes in parallel, namely, planar electron-beam lithography plus stacking of several layers on the one hand (KIT and Bilkent) and inherently three-dimensional direct- ...
... The strategy of PHOME towards achieving truly three-dimensional (and bulk) photonic metamaterials has been to follow two fabrication routes in parallel, namely, planar electron-beam lithography plus stacking of several layers on the one hand (KIT and Bilkent) and inherently three-dimensional direct- ...
PPLN waveguide for quantum communication | SpringerLink
... Apart from featuring a high down-conversion-efficiency, a two-photon source for quantum communication must be able to create entangled photons. One possible way to infer the two photon quantum state would be to reconstruct its density matrix [25]. Another possibility is to perform a Bell-type experi ...
... Apart from featuring a high down-conversion-efficiency, a two-photon source for quantum communication must be able to create entangled photons. One possible way to infer the two photon quantum state would be to reconstruct its density matrix [25]. Another possibility is to perform a Bell-type experi ...
Full-Text PDF
... and in turn taking advantages of tunable optics to control or sense the fluid sample. The concept and implementation of using fluid to fabricate optical components and realize optical functions is not new. Stemming from the early 1900s, a deformable mirror was proposed and demonstrated by spinning f ...
... and in turn taking advantages of tunable optics to control or sense the fluid sample. The concept and implementation of using fluid to fabricate optical components and realize optical functions is not new. Stemming from the early 1900s, a deformable mirror was proposed and demonstrated by spinning f ...
The optics and performance of dual-focus fluorescence correlation
... slow rotational diffusion and thus fluorescence anisotropy effects has a rather negligible effect on FCS measurements [24]. In all further considerations, we make the assumption that the fluorescing molecules are electric dipole absorbers and emitters. The excitation intensity distribution Iex(r) as ...
... slow rotational diffusion and thus fluorescence anisotropy effects has a rather negligible effect on FCS measurements [24]. In all further considerations, we make the assumption that the fluorescing molecules are electric dipole absorbers and emitters. The excitation intensity distribution Iex(r) as ...
Construction of a femtosecond mode
... There are several methods by which pulsed output can be generated, for example Qswitching and mode-locking [7]. By now the most advanced technique for ultarshort pulse generating is Kerr-lens mode- locking in solid-state lasers. This technique can provide sub-10 fs lasing and does not require very c ...
... There are several methods by which pulsed output can be generated, for example Qswitching and mode-locking [7]. By now the most advanced technique for ultarshort pulse generating is Kerr-lens mode- locking in solid-state lasers. This technique can provide sub-10 fs lasing and does not require very c ...
Soliton Radiation Beat Analysis of Optical Pulses Generated from
... of astronomical spectrographs in the low and medium-resolution range. This approach includes two steps: in the first step, an appropriate state of optical pulses is generated and subsequently moulded in the second step delivering the desired OFC. More precisely, the first step is realised by injecti ...
... of astronomical spectrographs in the low and medium-resolution range. This approach includes two steps: in the first step, an appropriate state of optical pulses is generated and subsequently moulded in the second step delivering the desired OFC. More precisely, the first step is realised by injecti ...
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age. Because of its advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication.The process of communicating using fiber-optics involves the following basic steps: Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal.