DESIGN, FABRICATION AND CHARACTERIZATION OF GUIDED
... filters have less explored experimentally, as there is material limitation to design this kind of filters with simple architecture and they also may require coupling to multiple resonances simultaneously. Apart from the design issues, experimental realization of these filters is challenging. There h ...
... filters have less explored experimentally, as there is material limitation to design this kind of filters with simple architecture and they also may require coupling to multiple resonances simultaneously. Apart from the design issues, experimental realization of these filters is challenging. There h ...
POLITECNICO DI MILANO Polo Regionale di Lecco Faculty of
... Politecnico di Milano which is equipped with a pulsed IPG Photonics fiber laser source, whose gain medium is Ytterbium doped glass and is pumped with a diode system. Method of controlling the transient behaviour for generated pulses (in nano seconds region) is by acusto optic Q- switched device. Spe ...
... Politecnico di Milano which is equipped with a pulsed IPG Photonics fiber laser source, whose gain medium is Ytterbium doped glass and is pumped with a diode system. Method of controlling the transient behaviour for generated pulses (in nano seconds region) is by acusto optic Q- switched device. Spe ...
2 µm Laser Sources and Their Possible Applications
... laser operation at room temperature was realised in 1975 using Cr,Tm:YAG (Caird et al., 1975). Shortly after the development of the first laser diodes in the wavelength range around 800 nm continuous wave diode pumped laser operation at room temperature was shown (Huber et al., 1988; Becker et al., ...
... laser operation at room temperature was realised in 1975 using Cr,Tm:YAG (Caird et al., 1975). Shortly after the development of the first laser diodes in the wavelength range around 800 nm continuous wave diode pumped laser operation at room temperature was shown (Huber et al., 1988; Becker et al., ...
Resolution enhancement techniques in microscopy
... explore the foundations of resolution as expounded by the astronomers and the physicists and describe the conditions for which they apply. Then we elucidate Ernst Abbe’s theory of optical formation in the microscope, and its experimental verification and dissemination to the world wide microscope com ...
... explore the foundations of resolution as expounded by the astronomers and the physicists and describe the conditions for which they apply. Then we elucidate Ernst Abbe’s theory of optical formation in the microscope, and its experimental verification and dissemination to the world wide microscope com ...
META`15 New York
... Sir Michael Berry University of Bristol, UK The singularities of light : intensity, phase, polarization Sir Michael Berry, is a world-renowned physicist famous for the discovery of geometric phase called the Berry’s effects in quantum mechanics ; He specializes in semiclassical physics (asymptotic p ...
... Sir Michael Berry University of Bristol, UK The singularities of light : intensity, phase, polarization Sir Michael Berry, is a world-renowned physicist famous for the discovery of geometric phase called the Berry’s effects in quantum mechanics ; He specializes in semiclassical physics (asymptotic p ...
The Nonlinear Optical Susceptibility
... the difference of those of the applied fields. Difference-frequency generation can be used to produce tunable infrared radiation by mixing the output of a frequency-tunable visible laser with that of a fixed-frequency visible laser. Superficially, difference-frequency generation and sum-frequency ge ...
... the difference of those of the applied fields. Difference-frequency generation can be used to produce tunable infrared radiation by mixing the output of a frequency-tunable visible laser with that of a fixed-frequency visible laser. Superficially, difference-frequency generation and sum-frequency ge ...
Elaboration and optimization of tellurite-based
... a commensurate decrease of the refractive index. A hydroxyl purification has been developed that when employed, resulted in high purity preform materials exhibiting a limited absorption in the transmission bandwidth in the near infrared (NIR). A reduction of 90 % in the OH content in candidate glass ...
... a commensurate decrease of the refractive index. A hydroxyl purification has been developed that when employed, resulted in high purity preform materials exhibiting a limited absorption in the transmission bandwidth in the near infrared (NIR). A reduction of 90 % in the OH content in candidate glass ...
Adaptive Control of Ultrashort Laser Pulses for
... mathematical description will be found in the following section. In the early days of lasers a continuous wave (cw) of coherent light with small bandwidth was emitted. Not much later the method of Q-switching was proposed by Hellwarth in 1961 [2] and pulsed laser output not much shorter than 100 ns ...
... mathematical description will be found in the following section. In the early days of lasers a continuous wave (cw) of coherent light with small bandwidth was emitted. Not much later the method of Q-switching was proposed by Hellwarth in 1961 [2] and pulsed laser output not much shorter than 100 ns ...
IOSR Journal of Applied Physics (IOSR-JAP)
... (FWHM) of the diffraction peak and θ is the Bragg diffraction angle of the XRD peak. The average crystallite size estimated is ≈ 41nm. 3.3. Fourier Transformer Infrared (FTIR) Spectroscopic Analysis: Fourier transformer infrared spectroscopy (FTIR) is one of the most powerful techniques to investiga ...
... (FWHM) of the diffraction peak and θ is the Bragg diffraction angle of the XRD peak. The average crystallite size estimated is ≈ 41nm. 3.3. Fourier Transformer Infrared (FTIR) Spectroscopic Analysis: Fourier transformer infrared spectroscopy (FTIR) is one of the most powerful techniques to investiga ...
Fibre-Loop Ring-Down Spectroscopy Using Liquid Core Waveguides
... liquid sample volumes while retaining the advantages of cavity ring-down spectroscopy. In this thesis cavity ring-down measurements are conducted, both, in the time domain and by measuring phase-shifts of sinusoidally modulated light, and the two methods are theoretically connected using a simple ma ...
... liquid sample volumes while retaining the advantages of cavity ring-down spectroscopy. In this thesis cavity ring-down measurements are conducted, both, in the time domain and by measuring phase-shifts of sinusoidally modulated light, and the two methods are theoretically connected using a simple ma ...
laser-based fibre-optic sensor for measurement of surface properties
... manufacturing process consists o f reducing an input sheet or billet using rollers to perform the deformation, often at high temperatures and pressure In performing this work, the roller becomes worn and needs to be reground A fibre-optic surface roughness sensor can perform higher speed, online, no ...
... manufacturing process consists o f reducing an input sheet or billet using rollers to perform the deformation, often at high temperatures and pressure In performing this work, the roller becomes worn and needs to be reground A fibre-optic surface roughness sensor can perform higher speed, online, no ...
Chapter 4 Optical Resonator
... 100, length d = 50 cm, and refractive index n = 1, to decay to one-half of its ...
... 100, length d = 50 cm, and refractive index n = 1, to decay to one-half of its ...
Laser Sources for Confocal Microscopy
... a concise description of the basic elements of a laser, its principle ...
... a concise description of the basic elements of a laser, its principle ...
Chapter 4 Optical Resonator
... 100, length d = 50 cm, and refractive index n = 1, to decay to one-half of its ...
... 100, length d = 50 cm, and refractive index n = 1, to decay to one-half of its ...
TECHNICAL GUIDE
... exception of certain laser systems and electro-optic devices, the transmission properties of light through an optical system can be well predicted and rationalized by wave theory. ...
... exception of certain laser systems and electro-optic devices, the transmission properties of light through an optical system can be well predicted and rationalized by wave theory. ...
Design and Analysis of Integrated Optical Waveguide Structures and
... etching (RIE) with an Aluminum (Al) mask were developed and lead to well fabricated optical devices in the (sub)micrometer range. The usage of focused ion beam (FIB) milling is invented for smoother front faces which were analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AF ...
... etching (RIE) with an Aluminum (Al) mask were developed and lead to well fabricated optical devices in the (sub)micrometer range. The usage of focused ion beam (FIB) milling is invented for smoother front faces which were analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AF ...
Laser Sources for Confocal Microscopy
... a concise description of the basic elements of a laser, its principle ...
... a concise description of the basic elements of a laser, its principle ...
Extreme pulse-front tilt from an etalon
... For a given beam size, etalons can be used to generate as much as 100 times more angular dispersion than gratings and prisms, and they have been used to construct high-resolution spectrometers [13,14] and pulse shapers [15]. By the above Fourier-transform result, the huge angular dispersion of etalo ...
... For a given beam size, etalons can be used to generate as much as 100 times more angular dispersion than gratings and prisms, and they have been used to construct high-resolution spectrometers [13,14] and pulse shapers [15]. By the above Fourier-transform result, the huge angular dispersion of etalo ...
Introduction to Diffraction Grating
... These gratings are special low period gratings designed for use in the high orders. They are generally used with a second grating or prism to separate overlapping diffracted orders. The resolution of an Echelle grating built on a precision glass substrate is typically 80-90% of the maximum theoretic ...
... These gratings are special low period gratings designed for use in the high orders. They are generally used with a second grating or prism to separate overlapping diffracted orders. The resolution of an Echelle grating built on a precision glass substrate is typically 80-90% of the maximum theoretic ...
Untitled
... major disadvantages of high cost and end-user unfamiliarity. The situation is changing. Laser diodes that cost $3000 in 1979 with lifetimes measured in hours now sell for a few dollars in small quantities, have reliability of tens of thousands of hours, and are widely used in compact disc players, l ...
... major disadvantages of high cost and end-user unfamiliarity. The situation is changing. Laser diodes that cost $3000 in 1979 with lifetimes measured in hours now sell for a few dollars in small quantities, have reliability of tens of thousands of hours, and are widely used in compact disc players, l ...
Biomedical Optical Imaging
... Figure 1.4 shows a schematic of a typical high speed, ultrahigh resolution spectral / Fourier domain OCT system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, ...
... Figure 1.4 shows a schematic of a typical high speed, ultrahigh resolution spectral / Fourier domain OCT system. The light source can be either a femtosecond laser or a broadband superluminescent diode (SLD). Our earlier studies used a femtosecond Ti:Sapphire laser for ultrahigh-resolution imaging, ...
pdf file
... where ωT is the THz ferquency and n g (ωopt ) is the group refractive index at optical frquencies. In Fig. 1(a) is shown the group refractive index at 800 nm by a red horizontal line. The phase matching condition is satisfied at THz wave frequency of 2.1 THz. For the simulations under perfect phase ...
... where ωT is the THz ferquency and n g (ωopt ) is the group refractive index at optical frquencies. In Fig. 1(a) is shown the group refractive index at 800 nm by a red horizontal line. The phase matching condition is satisfied at THz wave frequency of 2.1 THz. For the simulations under perfect phase ...
parametric interactions of short optical pulses in quasi
... presence of the largest-amplitude electric fields ever generated in a laboratory. While the properties of short duration, broad bandwidth, and high peak power, make ultrashort pulses attractive for many applications, they pose unique challenges in the context of frequency conversion and amplificatio ...
... presence of the largest-amplitude electric fields ever generated in a laboratory. While the properties of short duration, broad bandwidth, and high peak power, make ultrashort pulses attractive for many applications, they pose unique challenges in the context of frequency conversion and amplificatio ...
The Strontium Optical Lattice Clock
... One of the most well-developed applications of coherent interaction with atoms is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressiv ...
... One of the most well-developed applications of coherent interaction with atoms is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressiv ...
The Strontium Optical Lattice Clock
... One of the most well-developed applications of coherent interaction with atoms is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressiv ...
... One of the most well-developed applications of coherent interaction with atoms is atomic frequency standards and clocks. Atomic clocks find significant roles in a number of scientific and technological settings. State-of-the-art, laser-cooled, Cs-fountain microwave clocks have demonstrated impressiv ...
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age. Because of its advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication.The process of communicating using fiber-optics involves the following basic steps: Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal.