Results 261 to 270 of about 544,818 (296)

Novel Multimode Interference Modulator

Frontiers in Optics, 2005
A new structure for an ultra-compact MMI-based modulator is proposed. Extinction ratios as low as -37 dB are demonstrated. This value is only increased to -35 dB when low electro-absorption effects are included.
D. A. May-Arrioja, R. J. Selvas-Aguilar, P. LiKamWa, J. J. Sanchez-Mondragon   +3 more
openaire   +2 more sources

Visualization method of modal interference in multimode interference structures

Optics Communications, 2002
Abstract A method of modal field interference examination in multimode interference structures (MMI) is proposed, using fluorescence of the substance covering the MMI section. The method enables direct observation of modal fields interference and allows to determine the propagation lengths of N-fold images for the given window width of MMI section ...
Marek Błahut, Paweł Karasiński, Damian Kasprzak, Roman Rogoziński   +3 more
openaire   +1 more source

FBG Sensor Demodulated by Multimode Interference of Multimode Fiber

2009 Symposium on Photonics and Optoelectronics, 2009
We demonstrate an novel intensity based demodulation scheme for FBG sensors. The wavelength shifts of FBG sensors are transferred to the light power changes by a demodulator based on the multimode interference of multimode fiber. A demonstration system is built up, based on a broadband source ASE, a photo detector, and a ~5cm long step-index multimode ...
Jianzhong Zhang, Minglei Guo, Qilin Gao, Weimin Sun, Libo Yuan, Kaijun Wang, Wencai Jing, G. D. Peng   +7 more
openaire   +1 more source

Multimode Interference of Bloch Surface Electromagnetic Waves

ACS Nano, 2020
Integrated photonics aims at on-chip controlling light in the micro- and nanoscale ranges utilizing the waveguide circuits, which include such basic elements as splitters, multiplexers, and phase shifters. Several photonic platforms, including the well-developed silicon-on-insulator and surface-plasmon polaritons ones, operate well mostly in the IR ...
Kirill R. Safronov, Dmitry N. Gulkin, Ilya M. Antropov, Ksenia A. Abrashitova, Vladimir O. Bessonov, Andrey A. Fedyanin   +5 more
openaire   +2 more sources

Self-guiding multimode interference threshold switch

Optics Letters, 2000
We propose a new passive optical thresholding device that combines the principles of multimode interference (MMI) with self-guiding. The multimode region is composed of a nonlinear optical material that will support a self-guided beam (i.e., a material with a positive Kerr nonlinearity).
J S, Rodgers, S E, Ralph, R P, Kenan
openaire   +2 more sources

Odd excitation of symmetric multimode interference structures

Applied Optics, 2019
In this work, we study the odd excitation of symmetric multimode interference (MMI) integrated optical structures. We develop a simple formula for the imaging length in the guide under odd excitation in the MMI structures using the symmetry of the structure.
Salwa El-Sabban, Diaa Khalil
openaire   +2 more sources

Direct imaging of multimode interference in a channel waveguide

Optics Letters, 2003
By use of a near-field scanning optical microscope in collection mode, multimode interference was directly measured in an annealed proton-exchanged LiNbO3 waveguide. Periodic transitions from a single-peaked Gaussianlike intensity distribution to a double-peaked intensity distribution were observed.
A L, Campillo, J W P, Hsu, K R, Parameswaran, M M, Fejer   +3 more
openaire   +2 more sources

Microfluidic multimode interference device [PDF]

, 2010
A multimode interference device has been fabricated using a novel ultra-precision micromachining technique. The micromachining technique defines the interfaces of the device by cutting microfluidic channels into a silica-on-silicon substrate. Changing the refractive index of fluid within these microfluidic channels is shown to alter the optical ...
Holmes, C., Carpenter, Lewis, Hunt, Hamish, Gates, J.C., Smith, P.G.R.   +4 more
openaire  

Index profile engineering of multimode interference couplers

SPIE Proceedings, 2009
We propose a technique to improve the performance of high index contrast Multimode Interference (MMI) couplers. It is shown that imaging errors can be almost completely removed if the refractive index profile of the multimode region is properly designed.
A. Ortega-Moñux, I. Molina-Fernández, J. G. Wangüemert-Pérez   +2 more
openaire   +1 more source

Fabrication of a multimode-interference-based multimode power splitter in glass

SPIE Proceedings, 2010
Multimode Interference (MMI) based devices are widely used due to excellent performance. Here in this paper, a 1×2 multimode power splitter based on MMI is designed using three-dimensional beam propagation method (3D-BPM), and then fabricated in glass using the Ag+-Na+ ion-exchange technique.
Wei Xiang, Weiwei Zheng, Shuhang Jiang, Minghua Wang, Jianyi Yang, Yinlei Hao, Xiaoqing Jiang   +6 more
openaire   +1 more source