Long period grating based biosensor for the detection of Escherichia
... pulse repetition rate of 100 Hz, pulse duration of 12 ns and peak pulse energy of 10 mJ. The LPFGs were then annealed at 150 ◦ C for 3 h to release the excess hydrogen to stabilize their optical properties. The LPFGs so fabricated have R in the low loss window of telecommunication wavelengths (∼1.5 ...
... pulse repetition rate of 100 Hz, pulse duration of 12 ns and peak pulse energy of 10 mJ. The LPFGs were then annealed at 150 ◦ C for 3 h to release the excess hydrogen to stabilize their optical properties. The LPFGs so fabricated have R in the low loss window of telecommunication wavelengths (∼1.5 ...
My PhD - Photonics Research Group
... I would also like to thank the PICCO project partners from Glasgow, St.-Andrews and Copenhagen. Special thanks to Harold for fabricating the best grating couplers. And last but not least, thanks to all the people who have read my manuscript. Dirk Taillaert Gent, 13 juni 2004 ...
... I would also like to thank the PICCO project partners from Glasgow, St.-Andrews and Copenhagen. Special thanks to Harold for fabricating the best grating couplers. And last but not least, thanks to all the people who have read my manuscript. Dirk Taillaert Gent, 13 juni 2004 ...
Performance of extended depth of field systems and
... by digital processing. Many pupils have been designed to implement WFC; they all propose different trade-offs between MTF and DOF. In this paper, we demonstrate that for any symmetric revolution optic there is an absolute trade-off between MTF and DOF. This limit is fixed by diffraction and conseque ...
... by digital processing. Many pupils have been designed to implement WFC; they all propose different trade-offs between MTF and DOF. In this paper, we demonstrate that for any symmetric revolution optic there is an absolute trade-off between MTF and DOF. This limit is fixed by diffraction and conseque ...
Optical negative refraction by four-wave mixing in thin metallic nanostructures LETTERS *
... the phase conjugation approach leads only to a fixed refractive index of −1. Furthermore, because the phase matching condition works for both propagating and evanescent waves with arbitrarily large in-plane wavevectors, the deep subwavelength information contained in the evanescent signal can be tra ...
... the phase conjugation approach leads only to a fixed refractive index of −1. Furthermore, because the phase matching condition works for both propagating and evanescent waves with arbitrarily large in-plane wavevectors, the deep subwavelength information contained in the evanescent signal can be tra ...
An Optical Fiber Lateral Displacement Measurement Method and
... tool for topographical measurement with nano- and sub-nanometer resolution [5], but usually the single scanning distance is of the order of 150 ˆ 150 µm, and the scanning speed is also a limitation. Eddy current sensors have a large range with linearity error of less than ˘3% [6,7], but they are not ...
... tool for topographical measurement with nano- and sub-nanometer resolution [5], but usually the single scanning distance is of the order of 150 ˆ 150 µm, and the scanning speed is also a limitation. Eddy current sensors have a large range with linearity error of less than ˘3% [6,7], but they are not ...
Acousto-Optic Devices and Applications
... required is about 2.5 times that predicted by the small signal theory. ...
... required is about 2.5 times that predicted by the small signal theory. ...
Fabrication and Application of Phase only Holograms for High
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
... leads to test sample destruction. Cooling of the samples with compressed air allowed them not to be destroyed at least for 60 seconds. 4. Beam shaping with binary phase only holograms Although the ability of ITO coatings to withstand high cw power levels is crucial for the envisioned applications it ...
Helium Neon Laser - Abbe School of Photonics
... another partially or completely. However, when the path difference between the light from adjacent slits is equal to the wavelength, λ, the waves are all in phase. Thus, the diffracted light will have maxima at angles ϕm given by the grating equation g sin ϕm = mλ , ...
... another partially or completely. However, when the path difference between the light from adjacent slits is equal to the wavelength, λ, the waves are all in phase. Thus, the diffracted light will have maxima at angles ϕm given by the grating equation g sin ϕm = mλ , ...
Optical fibres solutions
... The light from the laser is able to remain inside the stream of water because of total internal reflection. The light hits the waterair junction at an angle greater than the critical angle and is reflected back into the water. It continues to bounce back and forth down the water stream. ...
... The light from the laser is able to remain inside the stream of water because of total internal reflection. The light hits the waterair junction at an angle greater than the critical angle and is reflected back into the water. It continues to bounce back and forth down the water stream. ...
Two types of single-beam deflection and asymmetric transmission in
... of the irregular layer, like that shown in Fig. 1(a), is to redistribute the in-coupled energy in favor of one of the higher orders (jmj > 0). In this case, a propagating-wave regime takes place for both upper and lower regular segments of the PhC. For the second one, dispersion does not permit coup ...
... of the irregular layer, like that shown in Fig. 1(a), is to redistribute the in-coupled energy in favor of one of the higher orders (jmj > 0). In this case, a propagating-wave regime takes place for both upper and lower regular segments of the PhC. For the second one, dispersion does not permit coup ...
META10 Ogut
... beyond the diffraction limit. Ohdaira et al. [8] obtained local circular polarization by superposing two cross propagating evanescent waves. Lindfors et al. [9] illuminated an optical lens with unpolarized light, and obtained fully polarized light in rings on the focal planes. It has been recently d ...
... beyond the diffraction limit. Ohdaira et al. [8] obtained local circular polarization by superposing two cross propagating evanescent waves. Lindfors et al. [9] illuminated an optical lens with unpolarized light, and obtained fully polarized light in rings on the focal planes. It has been recently d ...
Soleil-Babinet Compensator
... Compensator Software Interface Plug into our SBC-COMM serial interface and use our compensator software to extend productivity of your Thorlabs Soleil-Babinet Compensator. The software combines an easy to use graphical interface with the performance models for all of our compensators to allow the us ...
... Compensator Software Interface Plug into our SBC-COMM serial interface and use our compensator software to extend productivity of your Thorlabs Soleil-Babinet Compensator. The software combines an easy to use graphical interface with the performance models for all of our compensators to allow the us ...
Nonlocal Labeling of Paths in a Single-Photon Interferometer
... Since the famous discussions of Einstein and Bohr at the 1927 Solvay conference, interference of quanta has been used to understand the most striking consequences of quantum superposition 关1兴. Feynman was particularly illuminating in his famous explanations, by putting quantum interference in terms ...
... Since the famous discussions of Einstein and Bohr at the 1927 Solvay conference, interference of quanta has been used to understand the most striking consequences of quantum superposition 关1兴. Feynman was particularly illuminating in his famous explanations, by putting quantum interference in terms ...
Waveguide Simualtion Using Mode Matching Method
... Weighted Optical Path Distance, which provides better numerical results for asymmetric structures. Typical waveguide structures including bending structures, straight-bendingstraight structures, long-period gratings, gratings with deposited layers and gratings with strong index corrugations are inve ...
... Weighted Optical Path Distance, which provides better numerical results for asymmetric structures. Typical waveguide structures including bending structures, straight-bendingstraight structures, long-period gratings, gratings with deposited layers and gratings with strong index corrugations are inve ...
(k) and Refractive Index
... Baseline and the 0%T/Blocked Beam Baseline are checked, but the option Use internal attenuator is left unchecked, as shown in Figure 4. Using this setup, when the correction prompt is given “Block the beam and press OK to perform a 0%T/Blocked Beam correction” the user will not actually block the be ...
... Baseline and the 0%T/Blocked Beam Baseline are checked, but the option Use internal attenuator is left unchecked, as shown in Figure 4. Using this setup, when the correction prompt is given “Block the beam and press OK to perform a 0%T/Blocked Beam correction” the user will not actually block the be ...
CHAPTER 1 Wave Nature of Light
... Wave from a practical EM source • In reality, an EM source would have a finite size and finite power. The light beam exhibits some inevitable divergence while propagating. The wavefronts are slowly bent away thereby spreading the wave. Light rays slowly diverge away from each other. ...
... Wave from a practical EM source • In reality, an EM source would have a finite size and finite power. The light beam exhibits some inevitable divergence while propagating. The wavefronts are slowly bent away thereby spreading the wave. Light rays slowly diverge away from each other. ...
Slow light in various media: a tutorial
... switches, and interferometers. With all this variety of sources, media, and applications, the slow light science is a truly multidisciplinary field whose understanding requires significant background knowledge from those who want to familiarize themselves with the field and, possibly, to contribute ...
... switches, and interferometers. With all this variety of sources, media, and applications, the slow light science is a truly multidisciplinary field whose understanding requires significant background knowledge from those who want to familiarize themselves with the field and, possibly, to contribute ...
A method to generate complex quasi-nondiffracting optical lat
... novel types of non-diffracting beams. Thus, a trial beam q = J0 (kt h cos qb ) exp(ikt z sin qb ) , with J0 being zero-order Bessel function, allows to produce a single-channel pattern in real space [Fig. 2(e)], while in frequency domain the spectrum of such beam appears to be very close to infinit ...
... novel types of non-diffracting beams. Thus, a trial beam q = J0 (kt h cos qb ) exp(ikt z sin qb ) , with J0 being zero-order Bessel function, allows to produce a single-channel pattern in real space [Fig. 2(e)], while in frequency domain the spectrum of such beam appears to be very close to infinit ...
A method for controlling the bandwidth of high-energy, few
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
INTERMEDIATE STAGE FUNDAMENTAL OF PHYSICS Sindh
... mass and electric charge, can be described completely by a single number with a unit. But many others important quantities have direction associated with them and can not be described by a single number. When a physical quantity is described by a number, called Scalar in contrast it is called Vector ...
... mass and electric charge, can be described completely by a single number with a unit. But many others important quantities have direction associated with them and can not be described by a single number. When a physical quantity is described by a number, called Scalar in contrast it is called Vector ...
Michelson Interferometer
... destructive interference will occur resulting in minima of light intensity at their focal points on the eye retina. Since for fixed d and λ and different values of m, a system of dark and bright circle concentric fringes each corresponding to a constant θ will be observed, such interference fringes ...
... destructive interference will occur resulting in minima of light intensity at their focal points on the eye retina. Since for fixed d and λ and different values of m, a system of dark and bright circle concentric fringes each corresponding to a constant θ will be observed, such interference fringes ...
Development of Optical Sensor Platforms based on - DORAS
... The losses in planar dielectric waveguides are usually much higher than those of an optical fibre but are typically < 1 dB/cm. Such high propagation losses restrict the use of planar waveguides to operations where guiding only occurs over a short distance. However, the planar waveguide also exhibits ...
... The losses in planar dielectric waveguides are usually much higher than those of an optical fibre but are typically < 1 dB/cm. Such high propagation losses restrict the use of planar waveguides to operations where guiding only occurs over a short distance. However, the planar waveguide also exhibits ...
Manual - Brown University Wiki
... The Optics Bench is shown in Figure 2. The Light Source, Component Holders, and Ray Table Base all attach magnetically to the bench as shown. For proper optical alignment, the edge of each of these components should be mounted flush to the alignment rail, which is the raised edge that runs along one ...
... The Optics Bench is shown in Figure 2. The Light Source, Component Holders, and Ray Table Base all attach magnetically to the bench as shown. For proper optical alignment, the edge of each of these components should be mounted flush to the alignment rail, which is the raised edge that runs along one ...
INTRODUCTORY OPTICS SYSTEM
... Experiment 12: Image Formation with Spherical Mirrors ...................... 29 Experiment 13: Image Formation with Cylindrical Lenses..................... 31 Experiment 14: Spherical Lenses—Spherical and Chromatic Aberration, Aperture Size, and Depth of Field ............................ 33 Experim ...
... Experiment 12: Image Formation with Spherical Mirrors ...................... 29 Experiment 13: Image Formation with Cylindrical Lenses..................... 31 Experiment 14: Spherical Lenses—Spherical and Chromatic Aberration, Aperture Size, and Depth of Field ............................ 33 Experim ...
Chapter 2.1 - Focusing Fundamentals
... each other out because they coincide peak to trough, you get a dark spot. When light passes through an aperture, the light waves are diffracted, changing the way the peaks and troughs interact at the focal plane. The net effect of these interacting photons results in a diffraction pattern caused by ...
... each other out because they coincide peak to trough, you get a dark spot. When light passes through an aperture, the light waves are diffracted, changing the way the peaks and troughs interact at the focal plane. The net effect of these interacting photons results in a diffraction pattern caused by ...
Diffraction grating
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.For practical applications, gratings generally have ridges or rulings on their surface rather than dark lines. Such gratings can be either transmissive or reflective. Gratings which modulate the phase rather than the amplitude of the incident light are also produced, frequently using holography.The principles of diffraction gratings were discovered by James Gregory, about a year after Newton's prism experiments, initially with items such as bird feathers. The first man-made diffraction grating was made around 1785 by Philadelphia inventor David Rittenhouse, who strung hairs between two finely threaded screws. This was similar to notable German physicist Joseph von Fraunhofer's wire diffraction grating in 1821.Diffraction can create ""rainbow"" colors when illuminated by a wide spectrum (e.g., continuous) light source. The sparkling effects from the closely spaced narrow tracks on optical storage disks such as CD's or DVDs are an example, while the similar rainbow effects caused by thin layers of oil (or gasoline, etc.) on water are not caused by a grating, but rather by interference effects in reflections from the closely spaced transmissive layers (see Examples, below). A grating has parallel lines, while a CD has a spiral of finely-spaced data tracks. Diffraction colors also appear when one looks at a bright point source through a translucent fine-pitch umbrella-fabric covering. Decorative patterned plastic films based on reflective grating patches are very inexpensive, and are commonplace.