![Optical pulse generation using a low-voltage electro-optic](http://s1.studyres.com/store/data/007280991_1-6b179780280615b4d2216b55880cc06c-300x300.png)
Optical pulse generation using a low-voltage electro-optic
... the signal is first obtained by a uniform (non chirped) SFBG of length L=6 cm, which was designed via an inverse scattering technique [4] and the optical isolator (OI) is used to avoid power back reflection from the grating. ...
... the signal is first obtained by a uniform (non chirped) SFBG of length L=6 cm, which was designed via an inverse scattering technique [4] and the optical isolator (OI) is used to avoid power back reflection from the grating. ...
No Slide Title
... detectors developed and is still in use for detecting electrically charged ions. It is based on the principle that the electrical conductivity of a liquid is proportional to the ionic concentration in the mobile phase. The design is simple, and the detector can be made small enough for an effective ...
... detectors developed and is still in use for detecting electrically charged ions. It is based on the principle that the electrical conductivity of a liquid is proportional to the ionic concentration in the mobile phase. The design is simple, and the detector can be made small enough for an effective ...
Novel sol-gel material for fabrication of a long period waveguide
... hybrid HfO2/SiO2 sol-gel layer to form waveguide core, and the replication process is illustrated in Figure 3. Initially, a film in the prepared solgel material I was spincoated on the surface of a 1.5-m-thick SiO2 buffer layer of a silicon substrate to be the lower cladding of the waveguide. To im ...
... hybrid HfO2/SiO2 sol-gel layer to form waveguide core, and the replication process is illustrated in Figure 3. Initially, a film in the prepared solgel material I was spincoated on the surface of a 1.5-m-thick SiO2 buffer layer of a silicon substrate to be the lower cladding of the waveguide. To im ...
Self-Organization, Broken Symmetry, and Lasing in an Atomic Vapor:
... To determine whether this gain reduction was due to perturbation of the grating or optical pumping, the experiment was repeated with the GP tuned to the sodium D1 transition, but with all other conditions identical. Since the D1 transition 0.5 THz away from the D2 transition, the GP will no longer b ...
... To determine whether this gain reduction was due to perturbation of the grating or optical pumping, the experiment was repeated with the GP tuned to the sodium D1 transition, but with all other conditions identical. Since the D1 transition 0.5 THz away from the D2 transition, the GP will no longer b ...
Session 10 Wave Optics
... frequency and the speed of sound in water. Wavelength in water = speed of sound/ frequency ...
... frequency and the speed of sound in water. Wavelength in water = speed of sound/ frequency ...
Slide 1
... • This is also true for camera. A cheap camera takes photos that are always in focus no matter where the subject is, this is because it has small lenses. • This of course works against resolution where larger NA improves this property. • In order to improve resolution without impacting DOF too much, ...
... • This is also true for camera. A cheap camera takes photos that are always in focus no matter where the subject is, this is because it has small lenses. • This of course works against resolution where larger NA improves this property. • In order to improve resolution without impacting DOF too much, ...
Angular directivity of diffracted wave in Bragg-mismatched A. Heifetz
... a waist size of about 1 mm. Note also that this model is consistent with the requirement that the direction of kR would follow the same path if incident from the right side, and exiting on the left side, due to the time-reversal symmetry of Maxwell’s equations. Consider next the diffracted wave S. Ag ...
... a waist size of about 1 mm. Note also that this model is consistent with the requirement that the direction of kR would follow the same path if incident from the right side, and exiting on the left side, due to the time-reversal symmetry of Maxwell’s equations. Consider next the diffracted wave S. Ag ...
End-of-Chapter Exercises
... Exercises 19 – 23 involve single slits and diffraction by circular openings. 19. Light of a particular wavelength is incident on a single slit that has a width of 2.00 µm. If the second zero in the diffraction pattern occurs at an angle of 30°, what is the wavelength of the light? 20. The label on ...
... Exercises 19 – 23 involve single slits and diffraction by circular openings. 19. Light of a particular wavelength is incident on a single slit that has a width of 2.00 µm. If the second zero in the diffraction pattern occurs at an angle of 30°, what is the wavelength of the light? 20. The label on ...
Optics: Against the spread of the light
... crack. Consider, for example, a beam from a simple laser pointer. It might still seem narrow and pencil-like when you shine it on a wall or screen a few metres from you, but if you were to point it at the Moon, it would have a diameter of several hundred kilometres. But there are ways to beat the sy ...
... crack. Consider, for example, a beam from a simple laser pointer. It might still seem narrow and pencil-like when you shine it on a wall or screen a few metres from you, but if you were to point it at the Moon, it would have a diameter of several hundred kilometres. But there are ways to beat the sy ...
Announcements
... • Some of it is transmitted (refracted) into the 2nd medium • Not all of the light is reflected at the surface • Note that the refracted angle is not equal to the incident angle • In fact, the angles are related to the velocities of light in the two media Æ sin θ1/sin θ2 = v1/v2 ...
... • Some of it is transmitted (refracted) into the 2nd medium • Not all of the light is reflected at the surface • Note that the refracted angle is not equal to the incident angle • In fact, the angles are related to the velocities of light in the two media Æ sin θ1/sin θ2 = v1/v2 ...
Is the speed of light in free
... Time correlated photon pairs are produced from parametric-down conversion. Idler photon goes through polarisation-maintaining fibres, onto the input port of a beamsplitter. Signal photons are given a transverse structure via spatial light modulators (SLMs), which we use as programmable diffractive o ...
... Time correlated photon pairs are produced from parametric-down conversion. Idler photon goes through polarisation-maintaining fibres, onto the input port of a beamsplitter. Signal photons are given a transverse structure via spatial light modulators (SLMs), which we use as programmable diffractive o ...
Chapter 2 Introduction to Waveguide and Bragg Grating Theory 2.1
... In general the properties of channel waveguides cannot be analytically evaluated without turning to numerical methods or making simplifying assumptions. Various methods of differing complexity and flexibility are possible but owing to its straightforward application the method selected to model simp ...
... In general the properties of channel waveguides cannot be analytically evaluated without turning to numerical methods or making simplifying assumptions. Various methods of differing complexity and flexibility are possible but owing to its straightforward application the method selected to model simp ...
Free-electron lasers
... Motivation: Photo-synthesis converts light from the sun very effective into chemical energy that triggers the conversion of CO2 to O2. If Photo-synthesis would be fully understood then it could be maybe used as an alternative source of energy. The involved proteins have been studied in synchrotron l ...
... Motivation: Photo-synthesis converts light from the sun very effective into chemical energy that triggers the conversion of CO2 to O2. If Photo-synthesis would be fully understood then it could be maybe used as an alternative source of energy. The involved proteins have been studied in synchrotron l ...
Cristaux Photoniques, PO-014 Ecole doctorale photonique Romuald
... In a linear regime, light source can be a wavelength tuneable source or a white light source and spectral resolution is ...
... In a linear regime, light source can be a wavelength tuneable source or a white light source and spectral resolution is ...
Direct index of refraction measurement at extreme
... window pairs are free of test material, while other pairs have one window coated with test material. In taking data, we first align a reference window pair to the two side-by-side first order focal beam spots and record a reference interferogram. We then move the sample mask to illuminate a window pai ...
... window pairs are free of test material, while other pairs have one window coated with test material. In taking data, we first align a reference window pair to the two side-by-side first order focal beam spots and record a reference interferogram. We then move the sample mask to illuminate a window pai ...
Interferometer design for writing Bragg gratings in optical fibers
... controls the apparent optical reflection angle between the phase mask and the target, and is equivalent to adjusting either the target or the phase mask angle about the y axis to bring these two components into optical alignment. This alignment is important for maintaining proper focus over the enti ...
... controls the apparent optical reflection angle between the phase mask and the target, and is equivalent to adjusting either the target or the phase mask angle about the y axis to bring these two components into optical alignment. This alignment is important for maintaining proper focus over the enti ...
Time-resolved detection of propagating Lamb waves in thin
... Fig. 4 with respect to their grating period including the first three harmonics. Because it is not possible to distinguish, which mode belongs to which wavevector, we did not assign any mode to an individual wavevector. As for the 100 nm grating case, most of the measured frequencies can be clearly ...
... Fig. 4 with respect to their grating period including the first three harmonics. Because it is not possible to distinguish, which mode belongs to which wavevector, we did not assign any mode to an individual wavevector. As for the 100 nm grating case, most of the measured frequencies can be clearly ...
04-Waves shorter
... lower limit is approximately 20 Hz and the upper limit is 20,000 Hz. In other words, our ears are supposed to be able to hear sound with frequencies that are greater than 20 Hz and less than 20,000 Hz. ...
... lower limit is approximately 20 Hz and the upper limit is 20,000 Hz. In other words, our ears are supposed to be able to hear sound with frequencies that are greater than 20 Hz and less than 20,000 Hz. ...
Ultrafast and High Resolution Crack Detection Using Fully
... Photonic time-stretch (PTS) technique, also known as dispersive Fourier transform [1], has enabled ultrafast interrogation of fiber Bragg grating (FBG) sensors with unprecedented measurement speed of tens of MHz [2]. This is made possible by using chromatic dispersion to largely stretch an ultrashor ...
... Photonic time-stretch (PTS) technique, also known as dispersive Fourier transform [1], has enabled ultrafast interrogation of fiber Bragg grating (FBG) sensors with unprecedented measurement speed of tens of MHz [2]. This is made possible by using chromatic dispersion to largely stretch an ultrashor ...
Monochromatic plane waves ( ) Plane waves have straight wave fronts
... Snell's law seems to require in some cases (whenever the angle of incidence is large enough) that the sine of the angle of refraction be greater than one. This of course is impossible, and the light in such cases is completely reflected by the boundary, a phenomenon known as total internal reflectio ...
... Snell's law seems to require in some cases (whenever the angle of incidence is large enough) that the sine of the angle of refraction be greater than one. This of course is impossible, and the light in such cases is completely reflected by the boundary, a phenomenon known as total internal reflectio ...
Physics Final Review Packet
... In the diagrams below, several sheets of paper are illuminated by different primary colors of light (R for red, B for blue, and G for green). Indicate what primary colors of light will be reflected and the appearance of the sheet of paper. (Note the similarity between this problem and the above prob ...
... In the diagrams below, several sheets of paper are illuminated by different primary colors of light (R for red, B for blue, and G for green). Indicate what primary colors of light will be reflected and the appearance of the sheet of paper. (Note the similarity between this problem and the above prob ...
Semiperiodicity versus periodicity for ultra broadband optical
... are relatively strong, the resulting enhancement of the optical absorption is narrowband conforming to the narrow spectral range of the excited mode.8,9 On the other side, random grating structures are capable of exciting a broad range of weak modes, however, as these multiple modes are rather faint ...
... are relatively strong, the resulting enhancement of the optical absorption is narrowband conforming to the narrow spectral range of the excited mode.8,9 On the other side, random grating structures are capable of exciting a broad range of weak modes, however, as these multiple modes are rather faint ...
NATIONAL UNIVERSITY OF SINGAPORE DEPARTMENT OF PHYSICS ADVANCED PLACEMENT TEST (SAMPLE)
... track surface are covered by a millimetre-thick polycarbonate layer with a refractive index n of 1.8, through which the laser passes before reflection. laser spot bump ...
... track surface are covered by a millimetre-thick polycarbonate layer with a refractive index n of 1.8, through which the laser passes before reflection. laser spot bump ...
Measurement of the Wavelength of Light
... Visible light is an electromagnetic wave, and one of the basic phenomena of a wave is interference. When light waves reflect from a grated surface, they interfere forming a pattern of bright and dark spots on a screen. By measuring the angles of constructive interference, the wavelength of the light ...
... Visible light is an electromagnetic wave, and one of the basic phenomena of a wave is interference. When light waves reflect from a grated surface, they interfere forming a pattern of bright and dark spots on a screen. By measuring the angles of constructive interference, the wavelength of the light ...
Notebook and Assignment Guidelines
... injury or damage to the equipment. Be sure to ask your teacher if you have any questions! 22. Once you have successfully derived the interference equation, you will use it to determine the wavelength of a laser. In this situation, the laser will actually shine through a diffraction grating, which pr ...
... injury or damage to the equipment. Be sure to ask your teacher if you have any questions! 22. Once you have successfully derived the interference equation, you will use it to determine the wavelength of a laser. In this situation, the laser will actually shine through a diffraction grating, which pr ...
Diffraction grating
![](https://commons.wikimedia.org/wiki/Special:FilePath/Diffraction_grating.jpg?width=300)
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.