Coupling to aeroGAIN-ROD fibers
... Optimize the seed coupling at low power by walking the beam for maximum core/clad ratio and Gaussian beam shape. Only use the θϕ-stages after the isolator. Use a CCD camera (e.g. Spiricon GRAS20) for optimum alignment. Use the xyz-stage holding the pump coupling lens to collimate and align the outpu ...
... Optimize the seed coupling at low power by walking the beam for maximum core/clad ratio and Gaussian beam shape. Only use the θϕ-stages after the isolator. Use a CCD camera (e.g. Spiricon GRAS20) for optimum alignment. Use the xyz-stage holding the pump coupling lens to collimate and align the outpu ...
snowbird_poster - Yavuz Lab! - University of Wisconsin–Madison
... Raman transition. As a result it becomes possible to obtain large group delays for large bandwidth optical pulses. One important practical application of EIT with large bandwidth pulses is to optical information processing. Our scheme may provide a unique way to controllably delay and coherently sto ...
... Raman transition. As a result it becomes possible to obtain large group delays for large bandwidth optical pulses. One important practical application of EIT with large bandwidth pulses is to optical information processing. Our scheme may provide a unique way to controllably delay and coherently sto ...
\ A/58
... distribution of the light beam 66 depend on the refractive index and thickness of these three layers, and the incident angle 70 betWeen the light beam 64 and the normal line 68. Generally speaking, When a light travels through a multi layer structure of metal layers or dielectric layers, the light i ...
... distribution of the light beam 66 depend on the refractive index and thickness of these three layers, and the incident angle 70 betWeen the light beam 64 and the normal line 68. Generally speaking, When a light travels through a multi layer structure of metal layers or dielectric layers, the light i ...
Overview of Stimulated Brillouin Scattering Effect
... within optical fibers are stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS). The non-linear phenomenon of SBS, first observed in 1964 [1, 2]. Once the power launched into an optical fiber exceeds a certain level, which is known as threshold level or threshold power, most of ...
... within optical fibers are stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS). The non-linear phenomenon of SBS, first observed in 1964 [1, 2]. Once the power launched into an optical fiber exceeds a certain level, which is known as threshold level or threshold power, most of ...
Compressive Passive Millimeter Wave Imaging with Extended Depth of Field
... insensitive to object distance. Using this technique increased the depth-of-field of a 94 GHz imager to 68” (1727 mm), which is four times its conventional value of approximately 17” (432 mm).3 Unfortunately this system, as well as others discussed in the literature,1, 2 form an image by scanning a ...
... insensitive to object distance. Using this technique increased the depth-of-field of a 94 GHz imager to 68” (1727 mm), which is four times its conventional value of approximately 17” (432 mm).3 Unfortunately this system, as well as others discussed in the literature,1, 2 form an image by scanning a ...
Time Domain Simulation of Optical MIMO Channels
... transmitter side and mode splitting at the receiver side, in particular. By using fusion or other couplers it is possible to realize a MIMO transmission system over multi-mode fibers (MMFs) as shown in [1, 2]. For a rigorous performance assessment of an optical MIMO system a model simulating the resp ...
... transmitter side and mode splitting at the receiver side, in particular. By using fusion or other couplers it is possible to realize a MIMO transmission system over multi-mode fibers (MMFs) as shown in [1, 2]. For a rigorous performance assessment of an optical MIMO system a model simulating the resp ...
Optical Fibres in Communications
... 9. FIBER SPLICES:A permanent joint formed between two individual optical fibers in the field or factory is known as a fiber splice. Fiber splicing is frequently used to establish long haul optical fiber links where smaller fiber lengths need to be joined, and there is no requirement for repeated con ...
... 9. FIBER SPLICES:A permanent joint formed between two individual optical fibers in the field or factory is known as a fiber splice. Fiber splicing is frequently used to establish long haul optical fiber links where smaller fiber lengths need to be joined, and there is no requirement for repeated con ...
Raman Scattering in Solids
... continuously. Raman scattering can be used to study both types of transitions. In the following, we shall give some examples. Raman himself studied the first-order transition of quartz from the α to the β phase at ~ 570°C.8 He found a specific phonon mode at 220 cm-1 decreasing in frequency as the t ...
... continuously. Raman scattering can be used to study both types of transitions. In the following, we shall give some examples. Raman himself studied the first-order transition of quartz from the α to the β phase at ~ 570°C.8 He found a specific phonon mode at 220 cm-1 decreasing in frequency as the t ...
A high numerical aperture (NA = 0.92)
... Our objective lens is designed for fluorescence imaging of cesium atoms at the diffraction limit with a NA of 0.92. Such a NA corresponds to a large photon collection efficiency covering almost 1/3 of the full solid angle, which results in a resolution of 460 nm. The design of the objective lens has ...
... Our objective lens is designed for fluorescence imaging of cesium atoms at the diffraction limit with a NA of 0.92. Such a NA corresponds to a large photon collection efficiency covering almost 1/3 of the full solid angle, which results in a resolution of 460 nm. The design of the objective lens has ...
Introduction - Research
... As per the requirements above, a device was made that was easy to fabricate, transparent, and biologically inert. The natural choice was to use a polydimethylsiloxane (PDMS) device that meets all the above specifications and is very quick to make (<24 hrs design to final). The PDMS device was fabric ...
... As per the requirements above, a device was made that was easy to fabricate, transparent, and biologically inert. The natural choice was to use a polydimethylsiloxane (PDMS) device that meets all the above specifications and is very quick to make (<24 hrs design to final). The PDMS device was fabric ...
A new approach to sum frequency generation of single
... of suitable gain media at various wavelengths limits the spectral coverage of second harmonic generation (SHG). Another very flexible source of tunable visible light is an optical parametric oscillator, but these have the disadvantage of being complicated to operate and require high pump power sourc ...
... of suitable gain media at various wavelengths limits the spectral coverage of second harmonic generation (SHG). Another very flexible source of tunable visible light is an optical parametric oscillator, but these have the disadvantage of being complicated to operate and require high pump power sourc ...
Optical and Quantum Communications
... converted into superposition states of one of the atoms. All four Bell measurements needed for the Bennett et al. singlet-state teleportation process [3] can then be made, sequentially, by detecting the presence (or absence) of fluorescence as an appropriate sequence of OOR laser pulses is applied t ...
... converted into superposition states of one of the atoms. All four Bell measurements needed for the Bennett et al. singlet-state teleportation process [3] can then be made, sequentially, by detecting the presence (or absence) of fluorescence as an appropriate sequence of OOR laser pulses is applied t ...
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... ranges are illustrated in Fig.2b. The front optics optically delivers the ECE radiation onto a pair of independent heterodyne detector arrays. The lenses in the front optics, made of high density polyethylene (HDPE), provide flexible zooming and focusing like a camera lens [7]. Note that the radial ...
... ranges are illustrated in Fig.2b. The front optics optically delivers the ECE radiation onto a pair of independent heterodyne detector arrays. The lenses in the front optics, made of high density polyethylene (HDPE), provide flexible zooming and focusing like a camera lens [7]. Note that the radial ...
... Modelocking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10-12s) or femtoseconds (10-15s).The basis of the technique is to induce a fixed phase relationship between the modes of the laser's resonant cavity. ...
Sample Pages
... where NA is called the numerical aperture of the fiber (see p. 11). The fiber can then guide all light impinging the input face with angles fulfilling this condition, which does not depend on the core size. This purely geometric picture gives reasonable results for large cores (strongly multimode fi ...
... where NA is called the numerical aperture of the fiber (see p. 11). The fiber can then guide all light impinging the input face with angles fulfilling this condition, which does not depend on the core size. This purely geometric picture gives reasonable results for large cores (strongly multimode fi ...
Testing the Limits
... conditions LDT scales linearly by wavelength. Higher damage thresholds have been seen for pulsed lasers at longer wavelengths. • LDT may have a dependence on the energy gap between the energy levels, with larger band gaps displaying higher LDT. However, this trend changes when non-linear optical ef ...
... conditions LDT scales linearly by wavelength. Higher damage thresholds have been seen for pulsed lasers at longer wavelengths. • LDT may have a dependence on the energy gap between the energy levels, with larger band gaps displaying higher LDT. However, this trend changes when non-linear optical ef ...
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... Diffuse f luorescence in deep tissues has been explored primarily as a means of tumor detection by locating the center of f luorescing objects.8 – 10 This approach relies on the fact that the f luorophore will preferentially accumulate in tumors.11 In this Letter we demonstrate a method whereby one ...
... Diffuse f luorescence in deep tissues has been explored primarily as a means of tumor detection by locating the center of f luorescing objects.8 – 10 This approach relies on the fact that the f luorophore will preferentially accumulate in tumors.11 In this Letter we demonstrate a method whereby one ...
Paper
... With the realization of coherent, laserlike atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. Stimulation has been observed in the formation of ...
... With the realization of coherent, laserlike atoms in the form of Bose-Einstein condensates it has become possible to explore matter-wave amplification, a process in which the number of atoms in a quantum state is amplified due to bosonic stimulation. Stimulation has been observed in the formation of ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.