Laser oscillation in proton implanted Nd:YAG waveguides
... A CW Ti:sapphire laser, with a tuning range between 750-850 nm, was used as the excitation source. The pump beam was coupled into the waveguide with a x10 microscope objective by the end-fire coupling technique. The output light was collected through a x20 microscope objective and directed to the en ...
... A CW Ti:sapphire laser, with a tuning range between 750-850 nm, was used as the excitation source. The pump beam was coupled into the waveguide with a x10 microscope objective by the end-fire coupling technique. The output light was collected through a x20 microscope objective and directed to the en ...
Digital Fourier Microscopy for Soft Matter Dynamics
... the dynamics both for large particles, whose motion could be easily followed with particle tracking, and for sub-diffraction scatterers, which can not be individually resolved with visible light. Closely connected to all the above methods is also the so called Fourier Transform Light Scattering (FTLS ...
... the dynamics both for large particles, whose motion could be easily followed with particle tracking, and for sub-diffraction scatterers, which can not be individually resolved with visible light. Closely connected to all the above methods is also the so called Fourier Transform Light Scattering (FTLS ...
Full Article PDF
... refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very high speed such that the pressure is nearly uniform for two neighbouring points in the jet. The validity of this hypothesis can be veri ...
... refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very high speed such that the pressure is nearly uniform for two neighbouring points in the jet. The validity of this hypothesis can be veri ...
Experimental and Theoretical Studies in Optical Coherence Theory
... With Newton as a great champion of the corpuscular nature of light, the development of the wave theory was stifled for a long time. It was not until the beginning of the nineteenth century that Thomas Young took the first step that led to the acceptance of the wave character of light. He extended th ...
... With Newton as a great champion of the corpuscular nature of light, the development of the wave theory was stifled for a long time. It was not until the beginning of the nineteenth century that Thomas Young took the first step that led to the acceptance of the wave character of light. He extended th ...
Far-field optical microscope with nanometer-scale
... droplets has been justified in the previous section, even more crucial question for the consideration of the far-field surface plasmon microscope performance is the surface plasmon propagation length. The importance of this question may again be illustrated in the case of infinitely thick metal film ...
... droplets has been justified in the previous section, even more crucial question for the consideration of the far-field surface plasmon microscope performance is the surface plasmon propagation length. The importance of this question may again be illustrated in the case of infinitely thick metal film ...
rtf
... It is conventional to consider all the remaining lenses in the microscope as just one lens, the objective lens of the microscope. (In reality both the objective lens and at least the first intermediary lens are important to the working of the microscope.) With this lens we focus the wave exiting the ...
... It is conventional to consider all the remaining lenses in the microscope as just one lens, the objective lens of the microscope. (In reality both the objective lens and at least the first intermediary lens are important to the working of the microscope.) With this lens we focus the wave exiting the ...
Quantum coherence-assisted propagation of surface plasmon polaritons
... coherent drive relaxes the conditions required for lossless propagation and allows reduction in the critical ðgc Þ and the threshold ðgth Þ pump values. We calculated the upper value of gain G for which the SPPs are confined in phaseonium region as 2:25 104 cm1 and 5:39 104 cm1 for visible and ...
... coherent drive relaxes the conditions required for lossless propagation and allows reduction in the critical ðgc Þ and the threshold ðgth Þ pump values. We calculated the upper value of gain G for which the SPPs are confined in phaseonium region as 2:25 104 cm1 and 5:39 104 cm1 for visible and ...
Acoustooptic interaction of two light beams in a paratellurite crystal
... was excited by a piezoelectric transducer made from xcut lithium niobate. The calculation has shown that, when the length of the piezoelectric transducer is l = 1.4 cm and the ultrasonic frequency is f = 180– 190 MHz, the sound divergence is 4 mrad. The acoustic-wave velocity is oriented at the angl ...
... was excited by a piezoelectric transducer made from xcut lithium niobate. The calculation has shown that, when the length of the piezoelectric transducer is l = 1.4 cm and the ultrasonic frequency is f = 180– 190 MHz, the sound divergence is 4 mrad. The acoustic-wave velocity is oriented at the angl ...
Double-pass acousto-optic modulator system
... fiber. This presents a challenge when the frequency of the light being injected into the fiber is ramped with AOMs, since the Bragg angle depends on the modulation frequency. The alignment problems caused by AOM frequency sweeps can be practically eliminated by using the doublepass configuration, in ...
... fiber. This presents a challenge when the frequency of the light being injected into the fiber is ramped with AOMs, since the Bragg angle depends on the modulation frequency. The alignment problems caused by AOM frequency sweeps can be practically eliminated by using the doublepass configuration, in ...
Time Domain Simulation of Optical MIMO Channels
... model must also include mode coupling properties of couplers, connectors, splices and the fiber itself. Previously published works have shown the effects of mode coupling within the transmitting fiber and due to splices [3]. So far the impact of couplers and mode excitation has not been studied. Addre ...
... model must also include mode coupling properties of couplers, connectors, splices and the fiber itself. Previously published works have shown the effects of mode coupling within the transmitting fiber and due to splices [3]. So far the impact of couplers and mode excitation has not been studied. Addre ...
Optical frequency combs: From frequency metrology to - JILA-PFC
... to which a zero crossing belongs is no longer defined (this phenomenon is often called “coherence collapse” which occurs at a certain multiplication factor). To perform phase-coherent frequency measurement the collapse frequency must be well above the (optical) frequency that is to be measured by th ...
... to which a zero crossing belongs is no longer defined (this phenomenon is often called “coherence collapse” which occurs at a certain multiplication factor). To perform phase-coherent frequency measurement the collapse frequency must be well above the (optical) frequency that is to be measured by th ...
Numerical Analysis of Orbital Angular Momentum Based Next
... performance was evaluated as a function of the number of OAM modes, at a wavelength λ equal to 1550nm for different SNR. From this figure we can observe that the performance is good whatever the number of mode, it is always less than 5.2 × 10-3, and the best performance was obtained when SNR =30dB.W ...
... performance was evaluated as a function of the number of OAM modes, at a wavelength λ equal to 1550nm for different SNR. From this figure we can observe that the performance is good whatever the number of mode, it is always less than 5.2 × 10-3, and the best performance was obtained when SNR =30dB.W ...
chapter 6—light and telescopes
... Infrared astronomy is often done from high-flying aircraft because a. infrared telescopes only need to get above the ozone layer. b. infrared radiation is absorbed low in Earth's atmosphere. c. infrared photons are quite energetic. d. infrared telescopes are not very heavy. ...
... Infrared astronomy is often done from high-flying aircraft because a. infrared telescopes only need to get above the ozone layer. b. infrared radiation is absorbed low in Earth's atmosphere. c. infrared photons are quite energetic. d. infrared telescopes are not very heavy. ...
CHAPTER 6—LIGHT AND TELESCOPES
... Infrared astronomy is often done from high-flying aircraft because a. infrared telescopes only need to get above the ozone layer. b. infrared radiation is absorbed low in Earth's atmosphere. c. infrared photons are quite energetic. d. infrared telescopes are not very heavy. ...
... Infrared astronomy is often done from high-flying aircraft because a. infrared telescopes only need to get above the ozone layer. b. infrared radiation is absorbed low in Earth's atmosphere. c. infrared photons are quite energetic. d. infrared telescopes are not very heavy. ...
Why random potentials?
... The random potential is produced by shining an off-resonant laser beam onto a diffusive plate and imaging the resulting speckle pattern on the BEC. ...
... The random potential is produced by shining an off-resonant laser beam onto a diffusive plate and imaging the resulting speckle pattern on the BEC. ...
Development of a New Optical Wavelength Rejection Filter
... Index Headings: Instrumentation, emission spectroscopy; Filters; Ar + lasers; Light scattering; Optics; Reflectance; Raman spectroscopy; Techniques, spectroscopic; Visible UV spectroscopy; X-ray diffraction. ...
... Index Headings: Instrumentation, emission spectroscopy; Filters; Ar + lasers; Light scattering; Optics; Reflectance; Raman spectroscopy; Techniques, spectroscopic; Visible UV spectroscopy; X-ray diffraction. ...
ALMA Newsletter N°5
... a small angle will be focused at a slightly different location on the CCD or photographic plate. We can distinguish it only from the on-axis source if this difference in locations is larger than the size of the diffraction pattern of the two sources. In the opposite case, the two diffraction pattern ...
... a small angle will be focused at a slightly different location on the CCD or photographic plate. We can distinguish it only from the on-axis source if this difference in locations is larger than the size of the diffraction pattern of the two sources. In the opposite case, the two diffraction pattern ...
P approximation for reflectance imaging with an oblique beam of arbitrary profile 1
... Continuous-wave reflectance imaging with a full-field illumination provides a simple and noncontact means to interrogate optically thick materials. As the imagers with high dynamic range and spatial resolution have become readily available at low cost, reflectance imaging of scattered and fluorescen ...
... Continuous-wave reflectance imaging with a full-field illumination provides a simple and noncontact means to interrogate optically thick materials. As the imagers with high dynamic range and spatial resolution have become readily available at low cost, reflectance imaging of scattered and fluorescen ...
Shifting the spherical focus of a 4Pi focusing system
... binary-phase optical element and a lens of high NA [11, 12]. Recently, the possibility of focusing a radially polarized beam to a sharp spherical focal spot was demonstrated theoretically for a 4Pi focusing system by properly choosing the input field at the pupil plane of the lens [13, 14]. Such sph ...
... binary-phase optical element and a lens of high NA [11, 12]. Recently, the possibility of focusing a radially polarized beam to a sharp spherical focal spot was demonstrated theoretically for a 4Pi focusing system by properly choosing the input field at the pupil plane of the lens [13, 14]. Such sph ...
Analyzing optical spectra by computer simulation
... Successful analysis of measured spectra of single and multiple layers can be pre-cursors of reliable thin film design. If the optical constants of the used materials are known, and if interface effects of multilayers are understood and included in the model, one can predict and design the properties ...
... Successful analysis of measured spectra of single and multiple layers can be pre-cursors of reliable thin film design. If the optical constants of the used materials are known, and if interface effects of multilayers are understood and included in the model, one can predict and design the properties ...
b1.2. generation and propagation of higher order gaussian beams
... Generation of higher order modes are interesting because of the phase singularity and the characteristic intensity distribution. In particular, the dark region is very useful to manipulate particles in single beam optical traps [1]. Large number of vortices available in higher order modes could be a ...
... Generation of higher order modes are interesting because of the phase singularity and the characteristic intensity distribution. In particular, the dark region is very useful to manipulate particles in single beam optical traps [1]. Large number of vortices available in higher order modes could be a ...
Frequency Mode Locking in Erbium Doped Fiber Laser Dhyaa . F
... nonlinear, gain factor associated with the pumping pulse , attenuation and others in the conclusion the general equation for the propagation of the optical fiber through the laser resonator. In addition, the introduction of the effect of mode locking process using frequency modulation in order to ge ...
... nonlinear, gain factor associated with the pumping pulse , attenuation and others in the conclusion the general equation for the propagation of the optical fiber through the laser resonator. In addition, the introduction of the effect of mode locking process using frequency modulation in order to ge ...
“The Rayleigh range of Gaussian Schell
... where r is the radius of the pinhole and ¶ is the wavelength of the light. This concept was later introduced in antenna theory to characterize the distance that a collimated beam will traverse before it begins to signi®cantly diverge [3]. More recently the Rayleigh range has come to be used in conne ...
... where r is the radius of the pinhole and ¶ is the wavelength of the light. This concept was later introduced in antenna theory to characterize the distance that a collimated beam will traverse before it begins to signi®cantly diverge [3]. More recently the Rayleigh range has come to be used in conne ...
A Reliable Method For Extraction Of Material Parameters In
... the calculated moduli of both the rigorous [see (3)] and the approximate [from (12)] transmission coefficients. As one can see, there is a very good agreement between the rigorous and approximate values of over the full range of and plotted here, this agreement becoming excellent when the difference ...
... the calculated moduli of both the rigorous [see (3)] and the approximate [from (12)] transmission coefficients. As one can see, there is a very good agreement between the rigorous and approximate values of over the full range of and plotted here, this agreement becoming excellent when the difference ...
H. Haus
... opposite sign. This is presently a very active field of research, since the performance of dispersion managed solitons is superior to that of solitons propagating on a uniform fiber.1-3 Communication systems utilizing dispersion managed solitons, still may not be deployed in spite of their excellent ...
... opposite sign. This is presently a very active field of research, since the performance of dispersion managed solitons is superior to that of solitons propagating on a uniform fiber.1-3 Communication systems utilizing dispersion managed solitons, still may not be deployed in spite of their excellent ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.