Partially coherent beam shaping and imaging
... order to make numerical calculations feasible, so-called modal approaches [46–51] are used extensively, especially to describe partial spatial coherence. Such modal approaches, in which the partially coherent field is represented as a superposition of fully coherent fields, lead to the evaluation of ...
... order to make numerical calculations feasible, so-called modal approaches [46–51] are used extensively, especially to describe partial spatial coherence. Such modal approaches, in which the partially coherent field is represented as a superposition of fully coherent fields, lead to the evaluation of ...
Quantum Effects in Atomic Nanofabrication Using Light Forces
... 1.2 Atomic Nanofabrication Using Light Forces The field of atom optics has seen an enormous boom through the advent of laser cooling techniques (Phillips and Metcalf, 1982), the availability of tunable laser sources and a detailed understanding of the atom-light interaction. The purpose of atom optic ...
... 1.2 Atomic Nanofabrication Using Light Forces The field of atom optics has seen an enormous boom through the advent of laser cooling techniques (Phillips and Metcalf, 1982), the availability of tunable laser sources and a detailed understanding of the atom-light interaction. The purpose of atom optic ...
Antireflective Coatings
... Broadband Multilayer AR Coatings (WAR) Dual Wavelength Band AR Coatings (DAR) Partial Reflective Coatings Single Wavelength Band PR Coatings (SPR) Broadband PR Coatings (BPR) Beamsplitter Coatings Laser Line Polarization Beamsplitter Coatings (LPS) Broadband Polarization Beamsplitter Coatings (BPS) ...
... Broadband Multilayer AR Coatings (WAR) Dual Wavelength Band AR Coatings (DAR) Partial Reflective Coatings Single Wavelength Band PR Coatings (SPR) Broadband PR Coatings (BPR) Beamsplitter Coatings Laser Line Polarization Beamsplitter Coatings (LPS) Broadband Polarization Beamsplitter Coatings (BPS) ...
Fabrication of Multi-wavelength Optical Reflector using On
... = 2.5µm and the incident wavelength is 1.55µm. The mechanism of the unique polarization characteristic is that TE polarized light could stimulate current formed by the nano-wires electronics, which allowed the light along this direction reflected back. However, for TM polarized light, for the existe ...
... = 2.5µm and the incident wavelength is 1.55µm. The mechanism of the unique polarization characteristic is that TE polarized light could stimulate current formed by the nano-wires electronics, which allowed the light along this direction reflected back. However, for TM polarized light, for the existe ...
Optical Properties of Rutile Single Crystals Grown Under Pressure
... presence of Magnel phases (TiO2-δ) i.e. oxygen deficient phases. The optical quality of the FZ-grown crystals was superior to that of commercially available Verneuil-grown rutile crystals [4,5]. Therefore, demands for the optical communication devices have stimulated the application of a floating zo ...
... presence of Magnel phases (TiO2-δ) i.e. oxygen deficient phases. The optical quality of the FZ-grown crystals was superior to that of commercially available Verneuil-grown rutile crystals [4,5]. Therefore, demands for the optical communication devices have stimulated the application of a floating zo ...
Nonlinear polarization effects in optical fibers: polarization attraction
... with the case of a linear polarizer: for an input depolarized beam, on average 50% of the power is lost at the polarizer output. Moreover, in a lossless polarizer the input signal SOP fluctuations are not converted into output intensity fluctuations. B. Theory of Lossless Polarizers It has been know ...
... with the case of a linear polarizer: for an input depolarized beam, on average 50% of the power is lost at the polarizer output. Moreover, in a lossless polarizer the input signal SOP fluctuations are not converted into output intensity fluctuations. B. Theory of Lossless Polarizers It has been know ...
spectroscopic ellipsometry as a versatile tool to study thin films
... With scaling down of semiconductor devices, due to its inherent benefits [8] compared to other thin film deposition techniques, the application of ALD has sparked a good deal of interest. Especially for nano-scale devices, in where each of the layers should be as thin and perfect as possible. Deposi ...
... With scaling down of semiconductor devices, due to its inherent benefits [8] compared to other thin film deposition techniques, the application of ALD has sparked a good deal of interest. Especially for nano-scale devices, in where each of the layers should be as thin and perfect as possible. Deposi ...
Digital Signal Processing for Optical Coherent Communication
... Since 2007, coherent detection has been considered as the key technology of optical communication systems [2]. Major challenge for future optical transmission systems is the strict frequency band usage limitation, which is measured by spectral efficiency (SE). In order to improve spectral efficiency ...
... Since 2007, coherent detection has been considered as the key technology of optical communication systems [2]. Major challenge for future optical transmission systems is the strict frequency band usage limitation, which is measured by spectral efficiency (SE). In order to improve spectral efficiency ...
Modeling Light Scattering in Tissue as Continuous Random Media
... much less than the transport mean free path ls to much greater than ls , which for this tissue is about 200 μm. EBS measures the probability distribution P (rs ) of ray exit distances relative to the point of entry in a scattering medium, in other words the spatial impulse response of diffuse refl ...
... much less than the transport mean free path ls to much greater than ls , which for this tissue is about 200 μm. EBS measures the probability distribution P (rs ) of ray exit distances relative to the point of entry in a scattering medium, in other words the spatial impulse response of diffuse refl ...
A very convenient setup to generate intense VUV coherent light at
... (i) Surprisingly, as noted one decade ago by Mahon et al.,9 the 125.140 nm emission is observed in a spectral region of positive dispersion of nonlinear medium, where phasematching is not satisfied under tight-focusing conditions. Until the present, the reason for efficient VUV generation at 125.140 n ...
... (i) Surprisingly, as noted one decade ago by Mahon et al.,9 the 125.140 nm emission is observed in a spectral region of positive dispersion of nonlinear medium, where phasematching is not satisfied under tight-focusing conditions. Until the present, the reason for efficient VUV generation at 125.140 n ...
New concept of laser fusion driver using Stimulated Brillouin
... 3. Stage II : Demonstrate 6kJ/10Hz system (64 X 100J@10Hz) 4. Stage III : Construct a single channel of laser fusion driver, 100kJ@10Hz (1024 X 100J@10Hz) ...
... 3. Stage II : Demonstrate 6kJ/10Hz system (64 X 100J@10Hz) 4. Stage III : Construct a single channel of laser fusion driver, 100kJ@10Hz (1024 X 100J@10Hz) ...
Modes of wave-chaotic dielectric resonators
... rotationally symmetric structures such as spheres, cylinders and disks. The reason for this is that the wave equation is separable and the solutions can be written in terms of special functions carrying three modes indices. The narrow (long-lived) resonances correspond to ray trajectories circling a ...
... rotationally symmetric structures such as spheres, cylinders and disks. The reason for this is that the wave equation is separable and the solutions can be written in terms of special functions carrying three modes indices. The narrow (long-lived) resonances correspond to ray trajectories circling a ...
CHAPTER 1 Wave Nature of Light
... The minimum spot size to which a Gaussian beam can be focused • Suppose that we reflect the Gaussian beam back on itself so that the beam is traveling in the –z direction and converging towards O. • The beam would still have the same diameter 2w0 (waist) at O. • From then on, the beam again diverge ...
... The minimum spot size to which a Gaussian beam can be focused • Suppose that we reflect the Gaussian beam back on itself so that the beam is traveling in the –z direction and converging towards O. • The beam would still have the same diameter 2w0 (waist) at O. • From then on, the beam again diverge ...
Holograms for shaping radio
... gratings that modify both the reflected and transmitted electromagnetic fields. In all the hologram techniques considered in this paper, the transmitted field is optimized for the desired output while the reflected field is ignored. Radio holograms are computer-generated holograms that operate with ...
... gratings that modify both the reflected and transmitted electromagnetic fields. In all the hologram techniques considered in this paper, the transmitted field is optimized for the desired output while the reflected field is ignored. Radio holograms are computer-generated holograms that operate with ...
Full text in DIVA
... Abstract. Characteristic changes in the organization of fibrillar collagen can potentially serve as an early diagnostic marker in various pathological processes. Tissue types containing collagen I can be probed by pulsed high-intensity laser radiation, thereby generating second harmonic light that p ...
... Abstract. Characteristic changes in the organization of fibrillar collagen can potentially serve as an early diagnostic marker in various pathological processes. Tissue types containing collagen I can be probed by pulsed high-intensity laser radiation, thereby generating second harmonic light that p ...
Fiber Bragg Gratings (FBGs)
... FOCS offer significant advantages over traditional current sensing technologies; the sensor element is naturally decoupled from the voltage line, there is minimal electrical interference on the signal line, they offer extremely fast response times with high measurement accuracy, the size and weight ...
... FOCS offer significant advantages over traditional current sensing technologies; the sensor element is naturally decoupled from the voltage line, there is minimal electrical interference on the signal line, they offer extremely fast response times with high measurement accuracy, the size and weight ...
Deposition and Characterization of Dielectric Distributed Bragg
... To improve the performance of VCSELs, mirrors with less optical loss can be used. VCSELs require mirrors with > 99 % reflectance, and Distributed Bragg Reflectors (DBRs) are used to achieve this. Today, epitaxially-grown semiconductor DBRs are used, however these have low refractive index contrast, ...
... To improve the performance of VCSELs, mirrors with less optical loss can be used. VCSELs require mirrors with > 99 % reflectance, and Distributed Bragg Reflectors (DBRs) are used to achieve this. Today, epitaxially-grown semiconductor DBRs are used, however these have low refractive index contrast, ...
Biosensing under an applied voltage using optical waveguide
... tin oxide (ITO) film of thickness ca. 10 nm coated onto a silicon titanium oxide (STO) waveguiding film serves as the working (sensing) electrode. We observe the effective refractive index of the 0th transverse electric guided mode to increase significantly in the presence of an applied potential du ...
... tin oxide (ITO) film of thickness ca. 10 nm coated onto a silicon titanium oxide (STO) waveguiding film serves as the working (sensing) electrode. We observe the effective refractive index of the 0th transverse electric guided mode to increase significantly in the presence of an applied potential du ...
A pulsed dye laser for photo-ionization of magnesium atoms
... avoided when a resonant multi-step photo-ionization process is used. The atoms are rst selectively excited on resonant transitions and then ionized. Hence, only the desired species will have a signicant ionization probability. This process also allows for isotope selectivity, if the spectral width ...
... avoided when a resonant multi-step photo-ionization process is used. The atoms are rst selectively excited on resonant transitions and then ionized. Hence, only the desired species will have a signicant ionization probability. This process also allows for isotope selectivity, if the spectral width ...
Active semiconductor-based grating waveguide structures
... resonance bandwidths that can be of the order of several tenths of a nanometer in the wavelength region of 1.55 m. Here, we chose to concentrate on high-finesse GWSs with narrow resonance bandwidths. In such structures, the tolerable absorption is relatively small, leading to a limited tunability ra ...
... resonance bandwidths that can be of the order of several tenths of a nanometer in the wavelength region of 1.55 m. Here, we chose to concentrate on high-finesse GWSs with narrow resonance bandwidths. In such structures, the tolerable absorption is relatively small, leading to a limited tunability ra ...
Modal Analysis and Controls Laboratory
... fiber ingress through the vacuum bag was accommodated at the trailing edge bag seam where the fibers were sealed in the seam with standard vacuum bagging tape, as seen in Figure 4. For redundancy in the sensing system, both ends of the fibers were terminated with FC/APC optical connectors so that me ...
... fiber ingress through the vacuum bag was accommodated at the trailing edge bag seam where the fibers were sealed in the seam with standard vacuum bagging tape, as seen in Figure 4. For redundancy in the sensing system, both ends of the fibers were terminated with FC/APC optical connectors so that me ...
Fiber Optics
... process. If light that has polarization components along both axes of the ellipse is launched into the fiber, the situation is more complex. Owing to the birefringence, the relative phase of the two polarization components changes during the propagation through the fiber. The resulting polarization ...
... process. If light that has polarization components along both axes of the ellipse is launched into the fiber, the situation is more complex. Owing to the birefringence, the relative phase of the two polarization components changes during the propagation through the fiber. The resulting polarization ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.