Results 121 to 130 of about 34,306 (240)

Non‐Uniform Programmable Photonic Waveguide Meshes

Laser &Photonics Reviews, EarlyView.
Integrating defect cells into uniform hexagonal waveguide meshes overcomes the fundamental spectral and temporal limitations of programmable photonics. By leveraging the Vernier effect through non‐uniform coupled cavities, this architecture achieves a tenfold increase in free spectral range and ultra‐fast sampling times, paving the way for next ...
Cristina Catalá‐Lahoz, José Capmany
wiley   +1 more source

A fiber optic intrusion monitoring system

Moldavian Journal of the Physical Sciences, 2013
A fiber optic intrusion monitoring system comprises a multimode optical fiber, a coherent light source, a CCD, and a processor for generation of the output signal. The system is based on the principle of variation of speckle pattern in the far-field of a
Culeac, Ion, Iovu, Mihail, Buzdugan, Artur, Ciornea, Viorel, Nistor, Iurie, Cojocaru, Ion   +5 more
doaj  

NIR/VIS Dual‐Comb Spectroscopy Comparing High and Low Repetition Rate Regimes

Laser &Photonics Reviews, EarlyView.
This work compares dual‐comb spectroscopy at lower and higher repetition rates, emphasizing the inherent trade‐off between spectral and temporal resolution. The 80 MHz system provides high‐resolution spectra suitable for analyzing complex molecular structures, whereas the free‐running 1 GHz platform enables fast measurements for real‐time trace gas ...
Alexander Eber, Mithun Pal, Lukas Fürst, Emily Hruska, Christoph Gruber, Marcus Ossiander, Birgitta Bernhardt   +6 more
wiley   +1 more source

Multimode optical fiber based spectrometers

, 2013
A standard multimode optical fiber can be used as a general purpose spectrometer after calibrating the wavelength dependent speckle patterns produced by interference between the guided modes of the fiber. A transmission matrix was used to store the calibration data and a robust algorithm was developed to reconstruct an arbitrary input spectrum in the ...
Redding, Brandon, Popoff, Sebastien M., Cao, Hui   +2 more
openaire   +2 more sources

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Displacement sensor with a wide dynamic range based on a balloon-like long-period fiber grating

Zhongguo Jianchuan Yanjiu
ObjectiveAiming at the problem of the narrow dynamic range of current optical fiber displacement sensors, a balloon-like long-period fiber grating (LPFG) displacement sensor with a simple structure and easy preparation method is designed. MethodsBased on
Pu CHENG, Huiling QIN, Liang PU
doaj   +1 more source

MXene‐Based Flexible Memory and Neuromorphic Devices

Small, EarlyView.
The unique two‐dimensional structure, excellent electrical conductivity, and diverse surface groups of MXenes have garnered significant attention. Coupled with their exceptional flexibility, MXene‐based devices hold immense potential for flexible memory and neuromorphic systems. This review comprehensively discusses the fundamentals of flexible devices,
Yan Li, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Yan Yan, Shuangmei Xue, Kui Zhou, Meng Zhang, Yutong Zhang, Qi‐Jun Sun, Yi Liu, Vellaisamy A. L. Roy, Ye Zhou, Su‐Ting Han   +13 more
wiley   +1 more source

A Brief Review of Optical Fiber Sensor based on Multimode Interference

Guangtongxin yanjiu
Optical fiber sensors based on Multimode Interference (MMI) have received widespread attention due to their distinguished advantages, such as high sensitivity and easy fabrication.
YU Zhenfang, LI Yunfei, GUO Mingliang, LUO Bing, LUO Xinyi, GENG Dongxian   +5 more
doaj  

Quasi‐BIC and Reflective Mode Coupling Drives SHG Beyond the Q Factor Limit

Small, EarlyView.
An analytical expression is developed to relate second‐harmonic generation to both the resonance Q factor and absorptance. Simulations and experiments on a dual‐resonance 3R‐MoS2 metasurface validate the formula, showing that absorptance engineering provides an effective route to enhance SHG beyond conventional Q‐only design.
Wenkai Yang, Hao Qin, Boqing Liu, Chuanyu Wang, Yilin Tang, Jiri Janousek, Xueqian Sun, Alex Y. Song, Yuerui Lu   +8 more
wiley   +1 more source

Mode and Polarization Division Multiplexing Based on Chalcogenide‐Glass‐on‐Thin‐Film Lithium Niobate

Nanophotonics, Volume 15, Issue 9, 13 May 2026.
High‐index GeSbSe chalcogenide glass loaded on thin‐film lithium niobate enables compact broadband mode‐ and polarization‐division multiplexing. Exploiting direction‐dependent birefringence of x‐cut LNOI, a four‐channel mode (de)multiplexer and asymmetric directional coupler‐based polarization splitter–rotator are demonstrated with great performance in
Zhexi Chen, Xin Hu, Yelu Shen, Lei Yang, Zhiqiang Shen, Yingxuan Zhao, Peipeng Xu, Zhen Sheng, Fuwan Gan   +8 more
wiley   +1 more source