Results 241 to 250 of about 36,052 (268)

Multimode interference tapered fiber refractive index sensors

Applied Optics, 2012
Real-time monitoring of the fabrication process of tapering down a multimode-interference-based fiber structure is presented. The device is composed of a pure silica multimode fiber (MMF) with an initial 125 μm diameter spliced between two single-mode fibers. The process allows a thin MMF with adjustable parameters to obtain a high signal transmittance,
Claudecir R, Biazoli, Susana, Silva, Marcos A R, Franco, Orlando, Frazão, Cristiano M B, Cordeiro   +4 more
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

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

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

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

High sensitivity multimode–multimode–multimode structure fiber sensor based on modal interference

Optics Communications, 2014
Abstract A novel double-parameter sensor based on a multimode–multimode–multimode (MMM) fiber structure has been proposed and experimentally demonstrated. The principle of operation depends on the effects of a series of interference signal superposition, which include core–core mode interference and core–cladding mode interference.
Jun Su, Zhengrong Tong, Ye Cao, Weihua Zhang   +3 more
openaire   +1 more source

Novel lasers using multimode interference reflector

2011 ICO International Conference on Information Photonics, 2011
We present a novel laser using multimode interference (MMI) reflectors. By using the MMI reflectors to form the laser cavity, the laser light is available on the chip, which makes the lasers very promising building blocks in photonic integrated circuits (PIC). These lasers are one of the first InP PIC devices fabricated in a generic multi-project wafer
Zhao, Jing, Kleijn, Emil, Smit, Meint K., Williams, Peter J., Knight, Ian, Wale, Michael J., Leijtens, Xaveer J M   +6 more
openaire   +2 more sources

Multimode interference devices based on silicon

SPIE Proceedings, 2005
Multimode interference devices based on silicon hollow waveguides have been designed, simulated, fabricated and characterized. Adequate confinement of light into a hollow waveguide and minimization of the propagation losses require a roughness of the structure below the working wavelength.
V. J. Cadarso, I. Salinas, A. Llobera, C. Dominguez   +3 more
openaire   +1 more source

Wireless Interference Recognition With Multimodal Learning

IEEE Transactions on Wireless Communications
In non-cooperative communications, malicious electromagnetic interference attacks communication systems and causes higher probability of communication disruption. In order to address the challenges posed by electromagnetic interference, the wireless interference recognition technique has emerged, which identifies the interference signals without priori
Pengyu Wang, Ke Ma, Yingshuang Bai, Chen Sun, Zhaocheng Wang, Sheng Chen   +5 more
openaire   +2 more sources

2D tactile sensor based on multimode interference and deep learning

Optics and Laser Technology, 2021
Zhenming Ding, Ziyang Zhang
exaly