Diffractive optical elements stored on photopolymers
... In the interferometric arm, to generate the interferences pattern we use a He-Ne laser, since the photopolymer does not present any absorption at 633 nm. We have implemented a Young’s fringes based two beams interferometer. This interferometer has been successfully applied in the phase-shift charact ...
... In the interferometric arm, to generate the interferences pattern we use a He-Ne laser, since the photopolymer does not present any absorption at 633 nm. We have implemented a Young’s fringes based two beams interferometer. This interferometer has been successfully applied in the phase-shift charact ...
DFB Quantum Cascade Laser Arrays The Harvard community has
... is limited to temperature tuning of been to develop a broadly tunable single-mode QCL source that combines the advantages of external cavity and DFB devices. Our device is based on an array of DFB-QCLs, monolithically integrated on the same chip, as outlined in our previous work [11]. We fabricated ...
... is limited to temperature tuning of been to develop a broadly tunable single-mode QCL source that combines the advantages of external cavity and DFB devices. Our device is based on an array of DFB-QCLs, monolithically integrated on the same chip, as outlined in our previous work [11]. We fabricated ...
Lecture 9
... Photons are stored in a photon map for later use. The resolution of the photon map is independent from the resolution of the geometry. Only a few thousands to a million photons are sparsely stored and the rest is statistically estimated from the density of the stored photons. After all the photons h ...
... Photons are stored in a photon map for later use. The resolution of the photon map is independent from the resolution of the geometry. Only a few thousands to a million photons are sparsely stored and the rest is statistically estimated from the density of the stored photons. After all the photons h ...
lab sheet - Faculty of Engineering
... surfaces from finger oils and contamination. If not, handle the components by their edges. Assemble the components over the optical table surface. (Do not lift components any higher off the table than necessary) 2) The HeNe laser can cause permanent damage to your vision. Never look directly into th ...
... surfaces from finger oils and contamination. If not, handle the components by their edges. Assemble the components over the optical table surface. (Do not lift components any higher off the table than necessary) 2) The HeNe laser can cause permanent damage to your vision. Never look directly into th ...
Total Internal Reflection and Critical Angle File
... Optical fibres are replacing electrical cables for the transmission of information. ...
... Optical fibres are replacing electrical cables for the transmission of information. ...
lab 7 Wave Optics
... viruses by size, but have found that they are too small to view with any microscope that uses visible light. You know, however, that for a small object illuminated by coherent light, a diffraction pattern will be formed rather then an image. The size of an object can be determined from its diffracti ...
... viruses by size, but have found that they are too small to view with any microscope that uses visible light. You know, however, that for a small object illuminated by coherent light, a diffraction pattern will be formed rather then an image. The size of an object can be determined from its diffracti ...
The Physics of Renewable Energy
... 2. A water wave moves from deep to shallow water. Describe changes that occur to the following characteristics of the wave as it crosses the boundary from deep to shallow water: ...
... 2. A water wave moves from deep to shallow water. Describe changes that occur to the following characteristics of the wave as it crosses the boundary from deep to shallow water: ...
optics - einstein classes
... reflection and its applications, Deviation and Dispersion of light by a prism, Lens Formula, Magnification, Power of a Lens, Combination of thin lenses in contact, Mircosrope and Astronomical Telescope (reflecting and refracting) and their magnifying powers. Wave optics : wavefront and Huyges’ princ ...
... reflection and its applications, Deviation and Dispersion of light by a prism, Lens Formula, Magnification, Power of a Lens, Combination of thin lenses in contact, Mircosrope and Astronomical Telescope (reflecting and refracting) and their magnifying powers. Wave optics : wavefront and Huyges’ princ ...
Bending and Strain Sensitivities in a Helicoidal Long
... without bending was less than 0.5 dB, and we could confirm that our proposed device shows better or equivalent performance in PDL. The spectral shift caused by temperature changes has been reported in [10], and its slope was 0.053 nm C. In Table I, we compared the aforementioned HLPG with previous L ...
... without bending was less than 0.5 dB, and we could confirm that our proposed device shows better or equivalent performance in PDL. The spectral shift caused by temperature changes has been reported in [10], and its slope was 0.053 nm C. In Table I, we compared the aforementioned HLPG with previous L ...
Highly doped InP as a low loss plasmonic material for
... fact that many molecules have vibrational and rotational absorption bands which can serve as fingerprints to detect and determine molecular species in this wavelength range. Moreover, the fast growing field of graphene plasmonics and related 2D materials operates in this wavelength regime as well [1 ...
... fact that many molecules have vibrational and rotational absorption bands which can serve as fingerprints to detect and determine molecular species in this wavelength range. Moreover, the fast growing field of graphene plasmonics and related 2D materials operates in this wavelength regime as well [1 ...
Lasers versus LEDs for Bioinstrumentation Laser Advantage #1
... a much more efficient source for accomplishing this task than the LED, resulting in lower instrument costs and superior performance (speed and sensitivity). Here we examine the role of source brightness and its impact on optical etendue and, hence, focused spot intensity, optical efficiency, and opt ...
... a much more efficient source for accomplishing this task than the LED, resulting in lower instrument costs and superior performance (speed and sensitivity). Here we examine the role of source brightness and its impact on optical etendue and, hence, focused spot intensity, optical efficiency, and opt ...
The Phase element .1
... C-band and InP/InGaAs technology: the laser diode vertical structure The C-band ranges from 191 to 196 THz, which corresponds to optical wavelengths (in vacuum) from 1570 to 1530 nm and to photon energies from 0.79 to 0.81 eV. The ternary compound In0.53Ga0.47As has its bandgap at 0.777 eV (at 300° ...
... C-band and InP/InGaAs technology: the laser diode vertical structure The C-band ranges from 191 to 196 THz, which corresponds to optical wavelengths (in vacuum) from 1570 to 1530 nm and to photon energies from 0.79 to 0.81 eV. The ternary compound In0.53Ga0.47As has its bandgap at 0.777 eV (at 300° ...
Electro-optical photonic circuits for classical and
... environment is ultimately dictated by diffraction and scattering, the latter being especially important in biological settings. At present, standard imaging methods in the visible can only penetrate a few hundreds of micrometers inside a biological tissue [3]. To overcome this, several modern techni ...
... environment is ultimately dictated by diffraction and scattering, the latter being especially important in biological settings. At present, standard imaging methods in the visible can only penetrate a few hundreds of micrometers inside a biological tissue [3]. To overcome this, several modern techni ...
Dark fringes
... •Spectrum curve (光谱曲线) :The intensity distribution of light with wavelength ( or frequency ) Good monochromaticity I ...
... •Spectrum curve (光谱曲线) :The intensity distribution of light with wavelength ( or frequency ) Good monochromaticity I ...
homework - Homework Market
... Now let’s try to find a mathematical expression for what we are seeing. First, notice that there is a protractor and intensity meter that can be found in the lower right of the sim. You can grab each by moving your pointer over top of them and clicking on your mouse while moving them in place. For c ...
... Now let’s try to find a mathematical expression for what we are seeing. First, notice that there is a protractor and intensity meter that can be found in the lower right of the sim. You can grab each by moving your pointer over top of them and clicking on your mouse while moving them in place. For c ...
Chapter 35
... inten-sity of a wave is proportional to the square of the amplitude. So now one has 1 + 1 = 4! This is called constructive interference. You can also get any intensity between 0 and 4 times the intensity of each wave, when two waves of the same wavelength, frequency, and amplitude are added up toget ...
... inten-sity of a wave is proportional to the square of the amplitude. So now one has 1 + 1 = 4! This is called constructive interference. You can also get any intensity between 0 and 4 times the intensity of each wave, when two waves of the same wavelength, frequency, and amplitude are added up toget ...
diffraction gratings
... *The efficiency also decreases the further off-Littrow (alpha does not equal beta) the grating is used. Holographic gratings may be designed with groove profiles that discriminate against high orders. This may be particularly effective in the VUV using laminar groove profiles created by ion-etching. ...
... *The efficiency also decreases the further off-Littrow (alpha does not equal beta) the grating is used. Holographic gratings may be designed with groove profiles that discriminate against high orders. This may be particularly effective in the VUV using laminar groove profiles created by ion-etching. ...
Photorefractive cyclometalated complexes
... substituting electronics with photonics, since, in principle, photons can carry much more information and more rapidly than electrons. Within this frame, materials with physical properties that can be modulated by light are very interesting, among these are photoconducting media [1], which exhibit a ...
... substituting electronics with photonics, since, in principle, photons can carry much more information and more rapidly than electrons. Within this frame, materials with physical properties that can be modulated by light are very interesting, among these are photoconducting media [1], which exhibit a ...
course objectives - Metropolitan Community College
... A minimum average score of 60% is required for each type of assignment. 2. classroom testing, homework assignments and lab reports will be used to assess student knowledge and understanding of ray diagrams; A minimum average score of 60% is required for each type of assignment. 3. classroom testing, ...
... A minimum average score of 60% is required for each type of assignment. 2. classroom testing, homework assignments and lab reports will be used to assess student knowledge and understanding of ray diagrams; A minimum average score of 60% is required for each type of assignment. 3. classroom testing, ...
O 28: Plasmonics and Nanooptics IV: Light
... modes. In our laser spectroscopic nP-PEEM experiments we observe such spectral shifts for silver particles covered with a ZnTPP layer of only four monolayers. ...
... modes. In our laser spectroscopic nP-PEEM experiments we observe such spectral shifts for silver particles covered with a ZnTPP layer of only four monolayers. ...
Document
... number of times a light wave must oscillate in traveling from one point to another - product of physical path length with refractive index Optical Path Difference (OPD): - comparing the OPL for a ray passing in the plane of exit pupil with the chief ray passing through pupil center - optical aberrat ...
... number of times a light wave must oscillate in traveling from one point to another - product of physical path length with refractive index Optical Path Difference (OPD): - comparing the OPL for a ray passing in the plane of exit pupil with the chief ray passing through pupil center - optical aberrat ...
10.2 Fourier Transform Infrared Spectroscopy
... Overview of the Infrared The highest frequency vibration is the H2 stretching motion which occurs at 4,400 cm-1. Although this transition is not infrared active (it is Raman active), ~4,000 cm-1 is usually taken to be the upper limit of the infrared. The lower limit is determined by instrumental co ...
... Overview of the Infrared The highest frequency vibration is the H2 stretching motion which occurs at 4,400 cm-1. Although this transition is not infrared active (it is Raman active), ~4,000 cm-1 is usually taken to be the upper limit of the infrared. The lower limit is determined by instrumental co ...
Generating Single Photons on Demand I Vladan Vuletic
... (see Figure 2), the grating will wash out and collective emission will not occur. Thus the entangled many-body state has a finite lifetime that depends on the temperature of the atoms and the chosen beam geometry. The single photon must be generated within a certain time after the source has been arm ...
... (see Figure 2), the grating will wash out and collective emission will not occur. Thus the entangled many-body state has a finite lifetime that depends on the temperature of the atoms and the chosen beam geometry. The single photon must be generated within a certain time after the source has been arm ...
Get
... geometrically scaled to ~120nm in the sample), DMD patterns that corresponding to submicron features could be made. As shown in Fig. 2, via 10 pulses, we were able to fabricate complex structures with <1μm features. As the experimental system was not a perfect imaging system (i.e. not all of the hig ...
... geometrically scaled to ~120nm in the sample), DMD patterns that corresponding to submicron features could be made. As shown in Fig. 2, via 10 pulses, we were able to fabricate complex structures with <1μm features. As the experimental system was not a perfect imaging system (i.e. not all of the hig ...
lecture_three_2016
... boundary normal to either side. The reflectance R is the ratio of the reflected over the incident flux (or Fig 3.11 Reflection and transmission of an incident beam ...
... boundary normal to either side. The reflectance R is the ratio of the reflected over the incident flux (or Fig 3.11 Reflection and transmission of an incident beam ...
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.