Laser ranging: a critical review of usual techniques
... therefore, be reduced by half to give the actual range to the target. To obtain 1 mm accuracy, the accuracy of the time interval measurement should be 6.7 ps. Since a single pulse is adequate for the unequivocal determination of distance with centimeter precision and accuracy depends only weakly on ...
... therefore, be reduced by half to give the actual range to the target. To obtain 1 mm accuracy, the accuracy of the time interval measurement should be 6.7 ps. Since a single pulse is adequate for the unequivocal determination of distance with centimeter precision and accuracy depends only weakly on ...
Light Source Notes
... providing data basically free of error due to pointing instability. A similar approach has been used in a Dual-beam laser deflection sensor described in Ref. [11]. Unfortunately, the compensation of the laser pointing instability with a reference beam has some limitations. Indeed, the optical paths ...
... providing data basically free of error due to pointing instability. A similar approach has been used in a Dual-beam laser deflection sensor described in Ref. [11]. Unfortunately, the compensation of the laser pointing instability with a reference beam has some limitations. Indeed, the optical paths ...
PART 3_ir spectra_01
... Grating Equation only applies if: d > l/2 Ingle and Crouch, Spectrochemical Analysis ...
... Grating Equation only applies if: d > l/2 Ingle and Crouch, Spectrochemical Analysis ...
Material Properties - CVI Melles Griot 2009 Technical Guide, Vol 2
... of incidence will be different at the two surfaces; therefore, t1 and t2 will generally be unequal. Distance tc, which becomes the surface-to-surface distance along a particular ray, must be determined by ray tracing. It is necessary to account separately for the s- and p-planes of polarization, and ...
... of incidence will be different at the two surfaces; therefore, t1 and t2 will generally be unequal. Distance tc, which becomes the surface-to-surface distance along a particular ray, must be determined by ray tracing. It is necessary to account separately for the s- and p-planes of polarization, and ...
Wei Zhang, Hainian Han, Yanying Zhao, Qiang Du, Zhiyi Wei. A
... have been reported [4-7]. At present, as the bridge of the microwave and optical frequency standard, optical frequency combs based on femtosecond lasers have been widely used in frequency metrology and optical frequency synthesizing. Up to now, most frequency combs are based on the technology of sel ...
... have been reported [4-7]. At present, as the bridge of the microwave and optical frequency standard, optical frequency combs based on femtosecond lasers have been widely used in frequency metrology and optical frequency synthesizing. Up to now, most frequency combs are based on the technology of sel ...
TUPB049
... In order to keep the exposure time as low as possible, an algorithm to superimpose several interferograms was implemented in Python. The experimental set-up is the same that the one described in previous case. The exposure time was set to 100 µs, the minimum given by the CCD, and data were acquired ...
... In order to keep the exposure time as low as possible, an algorithm to superimpose several interferograms was implemented in Python. The experimental set-up is the same that the one described in previous case. The exposure time was set to 100 µs, the minimum given by the CCD, and data were acquired ...
Active Control of Rogue Waves for Stimulated Supercontinuum
... when averaged over many pulse pairs, reflects the degree of coherence. Spontaneous SC is virtually incoherent, and cannot produce interference fringes, because there is no pulse-to-pulse correlation in the noise that initiates the soliton-fission process. When coherently stimulated, however, the int ...
... when averaged over many pulse pairs, reflects the degree of coherence. Spontaneous SC is virtually incoherent, and cannot produce interference fringes, because there is no pulse-to-pulse correlation in the noise that initiates the soliton-fission process. When coherently stimulated, however, the int ...
Light Scattering
... scattering intensity compared with red light. That is why the sky is blue. The intensity of the scattered light carries information about the molar mass of the scattering centres (molecules, in particular macromolecules), the angular dependence of the scattering intensity carries information about t ...
... scattering intensity compared with red light. That is why the sky is blue. The intensity of the scattered light carries information about the molar mass of the scattering centres (molecules, in particular macromolecules), the angular dependence of the scattering intensity carries information about t ...
Optically induced forces in scanning probe microscopy
... Here we review recent evidence that, at least for certain experimental configurations, the optical radiation influences the feedback control and therefore must be taken into account to properly interpret NSOM measurements. To understand the origin and the importance of this effect, we will briefly r ...
... Here we review recent evidence that, at least for certain experimental configurations, the optical radiation influences the feedback control and therefore must be taken into account to properly interpret NSOM measurements. To understand the origin and the importance of this effect, we will briefly r ...
Measuring cellular structure at submicrometer scale with light
... direction [tile A in Fig. 3(d)] and along the and axes, which illustrates the fact that despite the addition of small particles, the backscattering signal remains unchanged in these regions. We, therefore, conclude that the scattering in these regions is dominated by the large particles. In contrast ...
... direction [tile A in Fig. 3(d)] and along the and axes, which illustrates the fact that despite the addition of small particles, the backscattering signal remains unchanged in these regions. We, therefore, conclude that the scattering in these regions is dominated by the large particles. In contrast ...
Waveguide electro-optic modulation in micro-engineered
... Finally, in the downstream zone, there is no significant phase modulation at higher frequencies, but the excess modulation at lower frequencies is reduced by the fact that the phase modulation has an opposite sign with respect to the upstream and middle zones. In this way the overall phase change of ...
... Finally, in the downstream zone, there is no significant phase modulation at higher frequencies, but the excess modulation at lower frequencies is reduced by the fact that the phase modulation has an opposite sign with respect to the upstream and middle zones. In this way the overall phase change of ...
Trends in Optical Fiber Sensors - IEEE Bombay Section Symposium
... noise, leading to lower precision, but are simple and inexpensive systems. ...
... noise, leading to lower precision, but are simple and inexpensive systems. ...
Full-Text PDF
... thermal conductivity, non-degradability and high damage threshold [1–4]. GaAs-based solar cells also have many advantages, such as high photoelectric conversion efficiency, fine radiation resistance and good performance at high temperatures, etc. [5,6]. As science and technology develops, people alw ...
... thermal conductivity, non-degradability and high damage threshold [1–4]. GaAs-based solar cells also have many advantages, such as high photoelectric conversion efficiency, fine radiation resistance and good performance at high temperatures, etc. [5,6]. As science and technology develops, people alw ...
Optical and Quantum Communications—J. H. Shapiro, N. C. Wong
... We are embarked on research in the area of quantum information technology whose goal is to enable the quantum-mechanical information transmission, storage, and processing needed for future applications in quantum computing and quantum communication. Our theoretical work in this area has focused on a ...
... We are embarked on research in the area of quantum information technology whose goal is to enable the quantum-mechanical information transmission, storage, and processing needed for future applications in quantum computing and quantum communication. Our theoretical work in this area has focused on a ...
Non-specular reflection of convergent beams from Iiquid-solid interface
... The reflection of an acoustic beam incident at the Rayleigh angle from a liquid onto a solid has been studied for well collimated and divergent beams [13]; however, the reflection of convergent beams, such as those produced by a concave transducer or a lens, has not yet been examined explicitly . Th ...
... The reflection of an acoustic beam incident at the Rayleigh angle from a liquid onto a solid has been studied for well collimated and divergent beams [13]; however, the reflection of convergent beams, such as those produced by a concave transducer or a lens, has not yet been examined explicitly . Th ...
Second harmonic generation via total internal reflection quasi
... the input/output polarization of the propagating waves 2. The effective nonlinear d coefficient (deff) can also change sign after reflection depending on the selection of the input/output polarization which will result in an extra phase shift (ξπ) with ξ being 1 or 0 depending on the inversion of de ...
... the input/output polarization of the propagating waves 2. The effective nonlinear d coefficient (deff) can also change sign after reflection depending on the selection of the input/output polarization which will result in an extra phase shift (ξπ) with ξ being 1 or 0 depending on the inversion of de ...
The Optical Beam Diameter Within the Beam
... the best SNR performance. The optimal beam diameters correspond to the nominal beam diameters being approximately equal to the Fresnel zone size for the beam propagation distance √(λz)=6.6mm. A Gaussian beam of this size will expand in diameter by a factor of √2 over 20m of propagation distance, and ...
... the best SNR performance. The optimal beam diameters correspond to the nominal beam diameters being approximately equal to the Fresnel zone size for the beam propagation distance √(λz)=6.6mm. A Gaussian beam of this size will expand in diameter by a factor of √2 over 20m of propagation distance, and ...
Absorption of low-loss optical materials measured at 1064 nm by a
... choice of the modulation scheme. The 0.1-ppm兾cm signal offset in the figure was induced by some light coming from the pump laser. We calculated that this offset was created by 2 nW of Nd:YAG radiation striking one quadrant of the detector 共of a total of 12 W incident upon the sample兲. To evaluate si ...
... choice of the modulation scheme. The 0.1-ppm兾cm signal offset in the figure was induced by some light coming from the pump laser. We calculated that this offset was created by 2 nW of Nd:YAG radiation striking one quadrant of the detector 共of a total of 12 W incident upon the sample兲. To evaluate si ...
1.5% root-mean-square flat-intensity laser beam
... clocks [2] and quantum emulation [3]. Optical lattices are formed by standing wave interference of single-mode laser beams, generally of a Gaussian transverse profile, and ultracold atoms are attracted to the intensity minima or maxima by the optical dipole force. In such cold atom applications, fla ...
... clocks [2] and quantum emulation [3]. Optical lattices are formed by standing wave interference of single-mode laser beams, generally of a Gaussian transverse profile, and ultracold atoms are attracted to the intensity minima or maxima by the optical dipole force. In such cold atom applications, fla ...
Optical measurement of the gas number density in a Fabry-
... the optical technique is 1.4 × 10−6 mol m−3 in 3 s, which corresponds to a relative accuracy in the density determination of 3.4 × 10−8 at atmospheric pressure. This result is valid provided that the error contributions from the temperature and pressure dependence of molar polarizability, i.e. the t ...
... the optical technique is 1.4 × 10−6 mol m−3 in 3 s, which corresponds to a relative accuracy in the density determination of 3.4 × 10−8 at atmospheric pressure. This result is valid provided that the error contributions from the temperature and pressure dependence of molar polarizability, i.e. the t ...
52.3: An Improved Polarizing Beamsplitter LCOS Projection
... MacLeod describes the construction of an optical thin film plate polarizer in his book[5], but makes the point that the useful wavelength band for the beam splitter is very narrow. In fact, it is so narrow that it is unsuitable for the task under consideration. ...
... MacLeod describes the construction of an optical thin film plate polarizer in his book[5], but makes the point that the useful wavelength band for the beam splitter is very narrow. In fact, it is so narrow that it is unsuitable for the task under consideration. ...
Mode Structure of Active Resonators
... and the dispersion of the active medium(31. These interactions are, in most configurations, axially symmetric due to either the excitation mechanism or the mutual interaction of medium and axially symmetric field. For example, the propagation Gaussian a of beam through a homogeneously excitated acti ...
... and the dispersion of the active medium(31. These interactions are, in most configurations, axially symmetric due to either the excitation mechanism or the mutual interaction of medium and axially symmetric field. For example, the propagation Gaussian a of beam through a homogeneously excitated acti ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.