Beam Path Conditioning for High
... Temperature gradients are the most common cause of wavefront errors in beam path conditioning systems, and system designers attempt to reduce the gradients that create these phase errors. The refractive index of gases is typically close to unity, with a small increment above unity proportional to th ...
... Temperature gradients are the most common cause of wavefront errors in beam path conditioning systems, and system designers attempt to reduce the gradients that create these phase errors. The refractive index of gases is typically close to unity, with a small increment above unity proportional to th ...
The Optics of the Compound Eye of the Honeybee
... of a ray with the optical axis, the point of intersection is reported, which facilitates locating the focal point. Fig. 6 A shows the model which was used for the ray-tracing studies, and Fig. 6 B shows the paths taken by certain rays within the optical system. The ray numbered 1 is 8pu above and pa ...
... of a ray with the optical axis, the point of intersection is reported, which facilitates locating the focal point. Fig. 6 A shows the model which was used for the ray-tracing studies, and Fig. 6 B shows the paths taken by certain rays within the optical system. The ray numbered 1 is 8pu above and pa ...
Evolutionary optimization of layouts for high density free space
... nF I0 = m. Furthermore let δ(βi ) be the aberration of the angle βi from the allowed range. ...
... nF I0 = m. Furthermore let δ(βi ) be the aberration of the angle βi from the allowed range. ...
RESONANCE WAVELENGTH DEPENDENCE AND MODE
... of the transmitting and receiving antenna on the radiation pattern, on the angular response pattern, on the type of antenna and on the characteristics of the surrounding medium and so on [41–46]. In this paper we will discuss, for the first time to the best of our knowledge, the dependence of resona ...
... of the transmitting and receiving antenna on the radiation pattern, on the angular response pattern, on the type of antenna and on the characteristics of the surrounding medium and so on [41–46]. In this paper we will discuss, for the first time to the best of our knowledge, the dependence of resona ...
Scientific Program - Instituto de Física Facultad de Ciencias
... The role of delay in nonlinear systems, arising from a finite propagation time of the coupling signals, is of central importance in many different areas of science. Multi-section DFB lasers are ideal candidates for studying delay-related phenomena as they allow to control and to tune the relevant fe ...
... The role of delay in nonlinear systems, arising from a finite propagation time of the coupling signals, is of central importance in many different areas of science. Multi-section DFB lasers are ideal candidates for studying delay-related phenomena as they allow to control and to tune the relevant fe ...
Influence of optical forces on nonlinear optical frequency conversion
... Optomechanics investigate the interaction of light field and mechanical motion in an integrated system. Optical forces play an important role in an optomechanical system, which have been proposed and demonstrated based on diverse configurations, for example, a suspended Fabry-Perot cavity or high-fi ...
... Optomechanics investigate the interaction of light field and mechanical motion in an integrated system. Optical forces play an important role in an optomechanical system, which have been proposed and demonstrated based on diverse configurations, for example, a suspended Fabry-Perot cavity or high-fi ...
Manuscript2 - Open Research Exeter
... accuracy it becomes. This includes manufacturing accuracy and solar tracking accuracy. The relationship between concentration ratio and acceptance angle directly follows from etendue and is explained further by Jeffrey M. Gordon et.al [4–6]. When comparing the types of solar concentrator photovoltai ...
... accuracy it becomes. This includes manufacturing accuracy and solar tracking accuracy. The relationship between concentration ratio and acceptance angle directly follows from etendue and is explained further by Jeffrey M. Gordon et.al [4–6]. When comparing the types of solar concentrator photovoltai ...
... W (∆z, ρ). Nonetheless, this integral predicts a finite number of concentric rings. More important, the last ring is the brightest and its size changes monotonically as a function of the separation Zi between the sphere and the FP, as sketched in Fig. 1. Instead of using Eq. (1), we opted to do an e ...
Comparison of the sensitivity of air and dielectric
... and this impacts the figure of merit M through two competing effects as follows. In a perfect crystal, the photonic eigenstates of the system are delocalized Bloch states and we can treat the localized modes of the cavity as superpositions of the Bloch states. The Bloch states of the uniform crystal ...
... and this impacts the figure of merit M through two competing effects as follows. In a perfect crystal, the photonic eigenstates of the system are delocalized Bloch states and we can treat the localized modes of the cavity as superpositions of the Bloch states. The Bloch states of the uniform crystal ...
Supplementary Material for
... transmitted radiation is seen to be much greater than the divergence of the incident beam but small enough that the reflection coefficient at individual interfaces is essentially constant. The real parts of the corresponding correlation functions, (x), are shown in Fig. S4(b). Correlation lengths ...
... transmitted radiation is seen to be much greater than the divergence of the incident beam but small enough that the reflection coefficient at individual interfaces is essentially constant. The real parts of the corresponding correlation functions, (x), are shown in Fig. S4(b). Correlation lengths ...
V. experimental setup of all-optical tunable delay
... system. The input signal (t0) transmits in the wavelength converter.It uses to convert was by using the method of four-wave mixing (FWM) method.Optical fiber need to change the signal.The signal (t1) can be converted in the wavelength converter.After, this signal passes through the dispersive elemen ...
... system. The input signal (t0) transmits in the wavelength converter.It uses to convert was by using the method of four-wave mixing (FWM) method.Optical fiber need to change the signal.The signal (t1) can be converted in the wavelength converter.After, this signal passes through the dispersive elemen ...
chenjiqualv04 - Physics at UC Merced
... Solid-state laser systems often use 2 crystals for stable generation of wavelength-agile short pulsed laser radiation [12]. One can have synchronous short pulses trains at different wavelengths, and the wavelength can be widely tunable at certain frequency domain. These pulse trains are useful ...
... Solid-state laser systems often use 2 crystals for stable generation of wavelength-agile short pulsed laser radiation [12]. One can have synchronous short pulses trains at different wavelengths, and the wavelength can be widely tunable at certain frequency domain. These pulse trains are useful ...
ABOUT THE EXTRAORDINARY REFRACTIVE INDEX
... When a beam of light passes through the ADP crystal, results two beams with different properties. One of them is called the ordinary beam which is characterized by an ordinary refractive index, and the other is called extraordinary and is characterized by an extraordinary refractive index. For each ...
... When a beam of light passes through the ADP crystal, results two beams with different properties. One of them is called the ordinary beam which is characterized by an ordinary refractive index, and the other is called extraordinary and is characterized by an extraordinary refractive index. For each ...
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... Each flux surface of ideal tokamak plasma in equilibrium (Fig.1a) has uniform electron temperature (Te) and density (ne) owing to the fast heat and particle transport along the helical magnetic field lines constituting the flux surface. Thus, the equilibrium state is well described by 1D radial prof ...
... Each flux surface of ideal tokamak plasma in equilibrium (Fig.1a) has uniform electron temperature (Te) and density (ne) owing to the fast heat and particle transport along the helical magnetic field lines constituting the flux surface. Thus, the equilibrium state is well described by 1D radial prof ...
Inducing and Controlling Particle Motion in an Optical Trap
... The first speculations on the exchange of momentum between light and matter date back to 1619 [1]. The invention of the laser 55 years ago led to discovery of an ever-increasing number of applications that utilize optical force. An optical trap, known as optical tweezers, can trap objects as small a ...
... The first speculations on the exchange of momentum between light and matter date back to 1619 [1]. The invention of the laser 55 years ago led to discovery of an ever-increasing number of applications that utilize optical force. An optical trap, known as optical tweezers, can trap objects as small a ...
Physics and Computation of Aero-Optics
... beam for two different optical wavelengths. In this case the near-field OPDrms is 6.7 × 10−6 D, corresponding to phase distortions of 2πOPDrms /λ ≈ 17 and 4.2 for the two wavelengths (6.7 and 1.7 respectively, after tilt removal). Drastic losses of far-field beam intensity and coherence are observed ...
... beam for two different optical wavelengths. In this case the near-field OPDrms is 6.7 × 10−6 D, corresponding to phase distortions of 2πOPDrms /λ ≈ 17 and 4.2 for the two wavelengths (6.7 and 1.7 respectively, after tilt removal). Drastic losses of far-field beam intensity and coherence are observed ...
Visible Wavelength Fiber Bragg Grating Arrays for
... making all Bragg resonances first order. The transmission curves in Fig. 2 were measured with a supercontinuum source (Koheras) and an Ando spectrometer. ...
... making all Bragg resonances first order. The transmission curves in Fig. 2 were measured with a supercontinuum source (Koheras) and an Ando spectrometer. ...
Variable xy-UV beam expander for high-power laser
... smaller printed dimensions, DPSS lasers have been developed to operate in the ultraviolet (UV). One of the technical hurdles in employing a high power UV laser in a tool which is intended to operate continuously 24/7 for many years is that the laser beam characteristics can drift, or worse, degrade ...
... smaller printed dimensions, DPSS lasers have been developed to operate in the ultraviolet (UV). One of the technical hurdles in employing a high power UV laser in a tool which is intended to operate continuously 24/7 for many years is that the laser beam characteristics can drift, or worse, degrade ...
Optical limiting in a periodic materials with relaxational nonlinearity Xue Liu,
... demonstrates that phase changes of the beam in the transverse direction are sufficient to modulate the amplitude by the end of the medium. For a short response time ( τ = 0.1 ), not only does the profile of the forward propagating pulse undergo a major distortion into an arch-like shape, but also th ...
... demonstrates that phase changes of the beam in the transverse direction are sufficient to modulate the amplitude by the end of the medium. For a short response time ( τ = 0.1 ), not only does the profile of the forward propagating pulse undergo a major distortion into an arch-like shape, but also th ...
Optical phase measurement emphasized
... Before any quantitative measurement, we can qualitatively show that there is indeed some optical phase change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If ...
... Before any quantitative measurement, we can qualitatively show that there is indeed some optical phase change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If ...
Observation of the rotational Doppler shift of a white
... The linear Doppler shift is usually associated with the lineof-sight component of velocity between the source and observer. However, the Doppler effect can also be observed from transverse motion. If a moving rough surface is illuminated at an oblique angle, the light of frequency ω0 scattered at no ...
... The linear Doppler shift is usually associated with the lineof-sight component of velocity between the source and observer. However, the Doppler effect can also be observed from transverse motion. If a moving rough surface is illuminated at an oblique angle, the light of frequency ω0 scattered at no ...
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.