Results 21 to 30 of about 14,944 (303)

FSR-Eliminated Vernier Racetrack Resonators Using Grating-Assisted Couplers

IEEE Photonics Journal, 2013
We present the design and experimental demonstration of a contra-directional grating-coupled racetrack resonator exhibiting the Vernier effect. The device consists of two racetrack resonators that are coupled together in a cascaded configuration.
R. Boeck, W. Shi, L. Chrostowski, N. A. F. Jaeger   +3 more
doaj   +1 more source

Backscattering in silicon microring resonators: a quantitative analysis [PDF]

, 2016
Silicon microring resonators very often exhibit resonance splitting due to backscattering. This effect is hard to quantitatively and predicatively model.
Ballesteros, Bogaerts, Bogaerts, Chu, Fiers, Fiers, Gulde, Heebner, Heyn, Little, Little, Melati, Moresco, Morichetti, Morichetti, Morichetti, Rocca, Selvaraja, Tallur, Vaerenbergh, Vandoorne, Vos, Werquin, Xia, Xu, Zhang, Čtyroký   +26 more
core   +1 more source

Sensitive Demonstration of the Twin-Core Couplers including Kerr Law Non-Linearity via Beta Derivative Evolution

Fractal and Fractional, 2022
To obtain new solitary wave solutions for non-linear directional couplers using optical meta-materials, a new extended direct algebraic technique (EDAT) is used. This model investigates solitary wave propagation inside a fiber. As a result, twin couplers
Adeel Asad, Muhammad Bilal Riaz, Yanfeng Geng   +2 more
doaj   +1 more source

Coupling mechanism of gain-guided integrated semiconductor laser arrays [PDF]

, 1984
It is shown that a gain-guided laser array couples via propagating fields rather than the evanescent mode coupling typically responsible for directional coupling in passive (directional couplers) and active (laser array) devices. We show that these phase-
Kapon, E., Katz, J., Lindsey, C., Margalit, S., Yariv, A.   +4 more
core   +1 more source

Extraction of Coupling Coefficients of Directional Couplers Using Resonance Splitting

IEEE Photonics Journal, 2022
We theoretically and experimentally present a novel method to accurately extract coupling coefficients of directional couplers using a single circuit. It utilizes the phenomenon of resonance splitting induced by mode coupling in a ring resonator, where ...
Ang Li, Yeshaiahu Fainman
doaj   +1 more source

Nonlinearity-induced broadening of resonances in dynamically modulated couplers [PDF]

, 2009
We report the observation of nonlinearity-induced broadening of resonances in dynamically modulated directional couplers. When the refractive index of the guiding channels in the coupler is harmonically modulated along the propagation direction and out ...
A. Szameit, A. Tünnermann, Ablowitz, Blömer, Della Valle, Dreisow, Eisenberg, F. Dreisow, F. Lederer, Garanovich, Iyer, Kartashov, Kartashov, Kartashov, Kartashov, L. Torner, Lederer, Longhi, Longhi, Longhi, Luo, M. Heinrich, R. Keil, Rosberg, S. Nolte, Staliunas, Szameit, Szameit, V. A. Vysloukh, Y. V. Kartashov   +29 more
core   +1 more source

A Transistorized Directional Coupler

IEEE Transactions on Circuit Theory, 1968
In previous papers an active directional coupler using a triode, [1],[2] and its use in a bidirectional broad-band amplifier, [3] has been described. It is obvious that it is important to investigate how such a device can be realized using semiconductor techniques.
Denoth F., Pellegrini B.
openaire   +4 more sources

A New Class of Wideband Quadrature Coupled-Line Forward Couplers

IEEE Journal of Microwaves
This paper presents a new class of wideband quadrature coupled-line forward couplers making use of the unequal phase velocities of even- and odd-mode of coupled-lines in inhomogeneous media.
Henning Mextorf, Winfried Schernus
doaj   +1 more source

Dissimilar directional couplers showing -symmetric-like behavior

New Journal of Physics, 2017
Despite the benefits which the directional couplers based on parity-time symmetric systems may offer to the field of integrated optics, the realization of such couplers relies on rather strict design constraints on the waveguide parameters.
Wiktor Walasik, Chicheng Ma, Natalia M Litchinitser   +2 more
doaj   +1 more source

Tapered Optical Fiber Couplers Fabricated by Droplet-Based Chemical Etching

IEEE Photonics Journal, 2017
This paper presents a fabrication method for 2 × 2 twisted fiber-optic directional couplers based on biconical low-loss tapered optical fibers using a two-step wet-etching technique with hydrofluoric acid-based droplets and surface tension-driven ...
Gyeongho Son, Youngho Jung, Kyoungsik Yu
doaj   +1 more source