Needle-based reflection refractometry of scattering samples using
... where α = 2.93×10-2 µm-1 is the focused beam angle, λ = 1.3 µm is the wavelength, rs is the spot size, and n0 = 1.5 and n1 = 1.42 are the estimated refractive indices of the fiber and optical cement, respectively. This device was coupled to the sample arm of the polarization sensitive LCI (PS-LCI) s ...
... where α = 2.93×10-2 µm-1 is the focused beam angle, λ = 1.3 µm is the wavelength, rs is the spot size, and n0 = 1.5 and n1 = 1.42 are the estimated refractive indices of the fiber and optical cement, respectively. This device was coupled to the sample arm of the polarization sensitive LCI (PS-LCI) s ...
Active semiconductor-based grating waveguide structures
... GWS is based on the coupled wave theory, in which Bragg coupling between two counter propagating modes is considered. The coupled wave model is an adaptation of a model used for analyzing DFB lasers that was developed by Kazarinov and Henry [17], and provides details on both the spectral bandwidth a ...
... GWS is based on the coupled wave theory, in which Bragg coupling between two counter propagating modes is considered. The coupled wave model is an adaptation of a model used for analyzing DFB lasers that was developed by Kazarinov and Henry [17], and provides details on both the spectral bandwidth a ...
HIGH - Electrical and Computer Engineering
... radio frequency (RF) phase shifters, and analog/digital microwave links [1], [2]. They are also attractive as an external modulator in wavelength division multiplexing (WDM) fiber-optic telecommunication systems [3]. Recently, electrooptic (EO) polymers attracted extensive attention due to their adv ...
... radio frequency (RF) phase shifters, and analog/digital microwave links [1], [2]. They are also attractive as an external modulator in wavelength division multiplexing (WDM) fiber-optic telecommunication systems [3]. Recently, electrooptic (EO) polymers attracted extensive attention due to their adv ...
IEEE J. Quantum Electron. 33, 970 (1997)
... diodes (LD’s) and light-emitting diodes (LED’s) have been subjected to intensive research in recent years. With the successful demonstrations of blue–green LD’s using ZnSebased materials [1]–[3] and GaN-based materials [4], [5], researchers have made significant progress toward the ultimate goal of ...
... diodes (LD’s) and light-emitting diodes (LED’s) have been subjected to intensive research in recent years. With the successful demonstrations of blue–green LD’s using ZnSebased materials [1]–[3] and GaN-based materials [4], [5], researchers have made significant progress toward the ultimate goal of ...
Optical phase measurement emphasized
... change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If we place and rotate a polarizer in the path of the beam right before the beam enters into the prism, we ...
... change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If we place and rotate a polarizer in the path of the beam right before the beam enters into the prism, we ...
Temporal mode selectivity by frequency conversion in second
... [3]. The waveforms making up the orthogonal basis set will be overlapping in both time and frequency spectra, so standard frequency or time separation techniques do not apply. Because waveforms, or wave packets, have unique signatures in both time and frequency, we will call a system based on such a ...
... [3]. The waveforms making up the orthogonal basis set will be overlapping in both time and frequency spectra, so standard frequency or time separation techniques do not apply. Because waveforms, or wave packets, have unique signatures in both time and frequency, we will call a system based on such a ...
Slow light in various media: a tutorial
... Here ed12 is the dipole matrix element of the transition and is the only quantum mechanical variable that will be encountered in this tutorial. What is important for better understanding of the rest of the tutorial is that the minimum value of oscillator strength is zero, while the maximum value of ...
... Here ed12 is the dipole matrix element of the transition and is the only quantum mechanical variable that will be encountered in this tutorial. What is important for better understanding of the rest of the tutorial is that the minimum value of oscillator strength is zero, while the maximum value of ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.