Loss-compensated slow-light fiber Bragg grating with 22-km/s group velocity
This Letter reports the behavior of the slow-light resonances of a strong apodized fiber Bragg grating (FBG) in which the intrinsic loss is ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Pierre-Baptiste Vigneron Tommy Boilard Enkeleda Balliu Anna L. Broome Martin Bernier Michel J. F. Digonnet Source Type: research

Spontaneous diametric-drive acceleration initiated by a single beam in a photonic lattice
We demonstrate that a single Gaussian-like beam can self-bend during nonlinear propagation in a uniform photonic lattice. The two ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Yumiao Pei Zhaoyuan Wang Yi Hu Cibo Lou Zhigang Chen Jingjun Xu Source Type: research

Ultrafast internal modification of glass by selective absorption of a continuous-wave laser into excited electrons
The internal modification of glass using ultrashort pulse lasers has been attracting attention in a wide range of applications. However, ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Naoyuki Miyamoto Yusuke Ito Chaoran Wei Reina Yoshizaki Akihiro Shibata Ikuo Nagasawa Keisuke Nagato Naohiko Sugita Source Type: research

Modulation instability induced by cross-phase modulation of transient stimulated Raman scattering and self-phase modulation in calcite
Pairs of sidebands about the transient stimulated Raman scattering (SRS) 1086cm^ − 1 vibration mode peak are observed for calcite ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Shah Faisal B. Mazhar Robert R. Alfano Source Type: research

Multiplexable intrinsic Fabry – Perot interferometric fiber sensors for multipoint hydrogen gas monitoring
This Letter presents an approach to produce multiplexable optical fiber chemical sensor using an intrinsic Fabry – Perot ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Rongtao Cao Yang Yang Mohan Wang Xinruo Yi Jingyu Wu Sheng Huang Kevin P. Chen Source Type: research

Enlarging focal depth using epsilon-near-zero metamaterial for plasmonic lithography
Plasmonic lithography can utilize evanescent waves to produce subdiffraction patterns. However, the high loss and shallow depth of patterns ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Qijian Jin Gaofeng Liang Gang Chen Fen Zhao Shaokui Yan Kun Zhang Mengyu Yang Qi Zhang Zhongquan Wen Zhihai Zhang Source Type: research

Femtosecond synchronization of multiple mode-locked lasers and a microwave oscillator by multicolor electro-optic sampling
Simple multicolor electro-optic sampling-based femtosecond synchronization of multiple mode-locked lasers is demonstrated. Parallel timing ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Dohyeon Kwon Chan-Gi Jeon Dohyun Kim Igju Jeon Jungwon Kim Source Type: research

Topological valley plasmon transport in bilayer graphene metasurfaces for sensing applications
Topologically protected plasmonic modes located inside topological bandgaps are attracting increasing attention, chiefly due to their ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Yupei Wang Jian Wei You Zhihao Lan Nicolae C. Panoiu Source Type: research

Metasurface-bounded open cavities supporting virtual absorption: free-space energy accumulation in lossless systems
We investigate an anomalous scattering phenomenon exhibited by a lossless system based on metasurfaces. Electromagnetic energy is neither ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: A. Marini D. Ramaccia A. Toscano F. Bilotti Source Type: research

Combined compression-tension strain sensor over 1?? µ ε – 20??m ε by using non-uniform multiple-core-offset fiber
Combined compression-tension strain sensors with a range of 1 micro to a maximum of 20 milli-strain based on non-uniform ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Huibo Fan Liang Chen Xiaoyi Bao Source Type: research

Parity – time-symmetric frequency-tunable optoelectronic oscillator with a single dual-polarization optical loop
We propose and experimentally demonstrate a parity – time (PT)-symmetric frequency-tunable optoelectronic oscillator (OEO) in which ... (Source: Optics Letters)
Source: Optics Letters - May 29, 2020 Category: Physics Authors: Peng Li Zheng Dai Zhiqiang Fan Lianshan Yan Jianping Yao Source Type: research

Asymmetric localization and symmetric diffraction-free transmission in synthetic photonic lattice with anti-parity-time symmetry
We study, to the best of our knowledge, the first observations of light propagation in synthetic photonic lattice with anti-parity-time ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Yanan Dai Zengrun Wen Kaiwen Ji Zhenjuan Liu Haohao Wang Zhiqing Zhang Yuanmei Gao Baole Lu Yishan Wang Xinyuan Qi Jintao Bai Source Type: research

Deep UV random lasing from NaGdF_4:Yb^3+,Tm^3+ upconversion nanocrystals in amorphous borosilicate glass
The realization of lanthanide-doped upconversion nanocrystals embedded in a robust and transparent solid medium is highly desired to ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Xuhui Xu Wei Lu Ting Wang Wei Gao Xue Yu Jianbei Qiu Siu Fung Yu Source Type: research

Multimodal imaging for intra-droplet gas-cavity observation during droplet fragmentation
Herein, planar laser-induced fluorescence (PLIF) is used in combination with shadowgraphy to study water-droplet aerobreakup. The acquired ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Luc Biasiori-Poulanges Hazem El-Rabii Source Type: research

Total internal reflection enabled wide-field coherent anti-Stokes Raman scattering microscopy
Wide-field coherent anti-Stokes Raman scattering (CARS) microscopy offers an attractive means for the rapid and simultaneous acquisition of ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Benjamin Doughty Uvinduni I. Premadasa John F. Cahill Amber B. Webb Jennifer L. Morrell-Falvey Muneeba Khalid Scott T. Retterer Ying-Zhong Ma Source Type: research

10.4??kW coherently combined ultrafast fiber laser
An ultrafast laser delivering 10.4 kW average output power based on a coherent combination of 12 step-index fiber amplifiers is presented. ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Michael M ü ller Christopher Aleshire Arno Klenke Elissa Haddad Fran ç ois L é gar é Andreas T ü nnermann Jens Limpert Source Type: research

Femtosecond laser-ablation of gel and water
We study the expansion dynamics of super-heated material during ultra-fast laser ablation of water and gel, using transient-reflectivity ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Javier Hernandez-Rueda Dashdeleg Baasanjav Allard P. Mosk Dries van Oosten Source Type: research

Noise evolution with the phase-sensitive gain in a hybrid fiber phase-sensitive amplifier
We investigate the noise evolution of a hybrid fiber phase-sensitive amplifier (PSA) with an erbium-doped fiber amplifier (EDFA) as a ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Zhanchang Liu Zhirong Chen Xiaojie Guo Jiangbing Du Zhaohui Li Source Type: research

Optical Kerr nonlinearity of arrays of all-dielectric high-index nanodisks in the vicinity of the anapole state
The nonlinear optical properties of the high-index nanoparticles are boosted at the anapole state. Researchers intensively study this ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Andrey V. Panov Source Type: research

Penetration capability of near infrared Laguerre – Gaussian beams through highly scattering media
The higher capability of optical vortex beams of penetrating turbid media (e.g., biological fluids) with respect to the conventional ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Francesco di Bartolo Muhammad N. Malik Mirco Scaffardi Antonella Bogoni Simona Celi Paolo Ghelfi Antonio Malacarne Source Type: research

Deeply coded aperture for lensless imaging
In this Letter, we present a method for jointly designing a coded aperture and a convolutional neural network for reconstructing an object ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Ryoichi Horisaki Yuka Okamoto Jun Tanida Source Type: research

Few-mode frequency-modulated LiDAR receivers
We present a few-mode frequency-modulated receiver for light detection and ranging (LiDAR). We show that using a few-mode local oscillator ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Alireza Fardoost Fatemeh Ghaedi Vanani He Wen Guifang Li Source Type: research

Subwavelength hole defect assisted microring resonator for a compact rectangular filter
We propose and demonstrate a subwavelength hole defect assisted microring resonator (SHDAMR) structure. With the manipulated modal coupling ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Jiachen Li Sigang Yang Hongwei Chen Minghua Chen Source Type: research

Modulation instability in waveguides doped with anisotropic nanoparticles
We exploit the anisotropic plasmonic behavior of gold nanorods (AuNRs) to obtain a waveguide with a nonlinear coefficient dependent on both ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: A. D. S á nchez N. Linale J. Bonetti D. F. Grosz Source Type: research

Spatial pattern-shifting method for complete two-wavelength fringe projection profilometry
Two-wavelength fringe projection profilometry (FPP) unwraps a phase with the unambiguous phase range (UPR) of the least common multiple ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Chu Lin Dongliang Zheng Qian Kemao Jing Han Lianfa Bai Source Type: research

Single-pixel sensing with optimal binarized modulation
Conventional high-level sensing techniques require high-fidelity images as input to extract target features. The images are produced by ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Hao Fu Liheng Bian Jun Zhang Source Type: research

Rapid and precise compensation of scale factor in a fiber-optic gyroscope with a twin-peaks source
In this Letter, two gyro outputs containing identical rotation rates are produced by a twin-peaks light source with peak wavelengths of ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Weiran Wu Tuohua Xian Guodong Hu Kejiang Zhou Source Type: research

Low-noise octave-spanning mid-infrared supercontinuum generation in a multimode chalcogenide fiber
We demonstrate the generation of a low-noise, octave-spanning mid-infrared supercontinuum from 1700 to 4800 nm by injecting femtosecond ... (Source: Optics Letters)
Source: Optics Letters - May 27, 2020 Category: Physics Authors: Zahra Eslami Piotr Ryczkowski Lauri Salmela Go ë ry Genty Source Type: research

Optical axis-driven field discontinuity in a hyperbolic medium
The altering permittivity tensor of a hyperbolic medium from diagonal to off-diagonal by the constructive manipulation of the optical axis ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Shahnawaz Shah Yuyu Jiang Lu Song Huaping Wang Lian Shen Source Type: research

Experimental investigation on the effect of wavelength on aperture averaging in FSO communications
Atmospheric turbulence is a major impairment in free-space optical (FSO) communication systems. Based on the fact that the size of receiver ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Hatef Nouri Murat Uysal Source Type: research

Nonlinear Fourier transform for characterization of the coherent structures in optical microresonators
We propose and demonstrate, in the framework of the generic mean-field model, the application of the nonlinear Fourier transform (NFT) ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Sergei K. Turitsyn Igor S. Chekhovskoy Mikhail P. Fedoruk Source Type: research

Long focusing range and self-healing Bessel vortex beam generator: publisher ’ s note
This publisher ’ s note contains corrections to Opt. Lett.45, 2580 (2020).OPLEDP0146-959210.1364/OL.391232 (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Zhi-Yong Hu Zhen-Nan Tian Hua Fan Jian-Guan Hua Meng-Dan Qian Qi-Dai Chen Hong-Bo Sun Source Type: research

Resolution enhancement in an extended depth of field for volumetric two-photon microscopy
The resolution enhancement over the extended depth of field (DOF) in the volumetric two-photon microscopy (TPM) is demonstrated by ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Hongsen He Cihang Kong Ka Yan Chan W. L. So Hiu Ka Fok Yu-Xuan Ren Cora S. W. Lai Kevin K. Tsia Kenneth K. Y. Wong Source Type: research

Silicon microprotrusions with tailored chirality enabled by direct femtosecond laser ablation
Here, we report on formation of nanoprotrusions on the surface of a bulk crystalline silicon wafer under femtosecond-laser ablation with a ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: S. Syubaev E. Mitsai A. Porfirev S. Khonina S. Kudryashov T. Katkus S. Juodkazis E. L. Gurevich A. Kuchmizhak Source Type: research

Efficient full-color single-pixel imaging based on the human vision property — “ giving in to the blues ”
Single-pixel imaging is a novel, to the best of our knowledge, computational imaging scheme, but a large number of measurements are ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Ziheng Qiu Zibang Zhang Jingang Zhong Source Type: research

Demonstration of using two aperture pairs combined with multiple-mode receivers and MIMO signal processing for enhanced tolerance to turbulence and misalignment in a 10??Gbit/s QPSK FSO link
We utilize aperture diversity combined with multiple-mode receivers and multiple-input-multiple-output (MIMO) digital signal processing ... (Source: Optics Letters)
Source: Optics Letters - May 26, 2020 Category: Physics Authors: Haoqian Song Long Li Kai Pang Runzhou Zhang Kaiheng Zou Zhe Zhao Jing Du Hao Song Cong Liu Yinwen Cao Ari N. Willner Ahmed Almaiman Robert Bock Brittany Lynn Moshe Tur Alan E. Willner Source Type: research

Deep neural network-assisted high-accuracy microwave instantaneous frequency measurement with a photonic scanning receiver
A microwave instantaneous frequency measurement system with a photonic scanning receiver is proposed in which deep neural network ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Yuewen Zhou Fangzheng Zhang Jingzhan Shi Shilong Pan Source Type: research

Parametric upconversion of Ince – Gaussian modes
The Ince – Gaussian (IG) mode, a recently discovered type of structured Gaussian beam, corresponds to eigenfunctions of the paraxial ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Hao-Ran Yang Hai-Jun Wu Wei Gao Carmelo Rosales-Guzm á n Zhi-Han Zhu Source Type: research

High-efficiency luminescence in optical glass via the controllable crystallization of KYb_3F_10 nanocrystals depending on the dopants
A transparent glass ceramic (GC) is designed via the controllable precipitation of KYb_3F_10 nanocrystals. It is shown that the ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Zaijin Fang Jianfeng Li Yi Long Bai-Ou Guan Source Type: research

Absolute interferometric testing of a flat surface based on the Laplacian method
In the present study, a method is introduced for absolute interferometric testing. An interferometer is used to measure the phase ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Peyman Soltani Ahmad Darudi Source Type: research

Field demonstration of time-bin reference-frame-independent quantum key distribution via an intracity free-space link
Free-space quantum key distribution (QKD) based on mobile platforms, such as satellites, drones, and vehicles, is considered a promising ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Huan Chen Jipeng Wang Bangying Tang Zhenhua Li Bo Liu Shihai Sun Source Type: research

302     W single-mode power from an Er/Yb fiber MOPA: publisher ’ s note
This publisher ’ s note contains corrections to Opt. Lett.45, 2910 (2020).OPLEDP0146-959210.1364/OL.392786 (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Turghun Matniyaz Fanting Kong Monica T. Kalichevsky-Dong Liang Dong Source Type: research

Photonic simulation of giant atom decay
Spontaneous emission of an excited atom in a featureless continuum of electromagnetic modes is a fundamental process in quantum ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Stefano Longhi Source Type: research

High energy redshifted and enhanced spectral broadening by molecular alignment
We demonstrate an efficient approach for enhancing the spectral broadening of long laser pulses and for efficient frequency redshifting by ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: G. Fan R. Safaei O. Kwon V. Schuster K. L é gar é P. Lassonde A. Ehteshami L. Arias A. Laram é e J. Beaudoin-Bertrand J. Limpert Z. Tao M. Spanner B. E. Schmidt H. Ibrahim A. Baltu š ka F. L é gar é Source Type: research

When shot-noise-limited photodetectors disobey Poisson statistics
Photodetectors with internal gain are of great interest for imaging applications, since internal gain reduces the effective noise of ... (Source: Optics Letters)
Source: Optics Letters - May 22, 2020 Category: Physics Authors: Jacob Rabinowitz Mohsen Rezaei Min-Su Park Chee Leong Tan Melville Ulmer Hooman Mohseni Source Type: research

Compact multi-million Q resonators and 100??MHz passband filter bank in a thick-SOI photonics platform
We demonstrate ring and racetrack resonators with Qs of 3.8 to 7.5 million and 100 MHz bandwidth racetrack resonator filters, implemented ... (Source: Optics Letters)
Source: Optics Letters - May 21, 2020 Category: Physics Authors: Bohan Zhang Kenaish Al Qubaisi Matteo Cherchi Mikko Harjanne Yossef Ehrlichman Anatol N. Khilo Milo š A. Popovi ć Source Type: research

Quantitative objective-based ring TIRFM system calibration through back focal plane imaging
Being the established imaging tool for cell membrane-associated studies, total internal reflection fluorescence microscopy (TIRFM) still ... (Source: Optics Letters)
Source: Optics Letters - May 21, 2020 Category: Physics Authors: Wenjie Liu Yifan Yuan Chengfeng Zhang Yubing Han Zhimin Zhang Liang Xu Xiang Hao Cuifang Kuang Xu Liu Source Type: research

Compact broadband suspended silicon photonic directional coupler
Directional couplers are extensively used in photonic integrated circuits as basic components for efficient on-chip photonic signal ... (Source: Optics Letters)
Source: Optics Letters - May 21, 2020 Category: Physics Authors: Hamed Sattari Alain Yuji Takabayashi Yu Zhang Peter Verheyen Wim Bogaerts Niels Quack Source Type: research

Hybrid frequency-time spectrograph for the spectral measurement of the two-photon state
In this Letter, a hybrid frequency-time spectrograph combining a tunable optical filter and a dispersive element is presented for ... (Source: Optics Letters)
Source: Optics Letters - May 21, 2020 Category: Physics Authors: Xiao Xiang Ruifang Dong Runai Quan Yaqing Jin Ye Yang Ming Li Tao Liu Shougang Zhang Source Type: research

Creating a three-dimensional surface with antireflective properties by using femtosecond-laser Bessel-beam-assisted thermal oxidation
Metal surfaces with low reflectance have received considerable attention for their great optical, electrical, and thermal properties. ... (Source: Optics Letters)
Source: Optics Letters - May 21, 2020 Category: Physics Authors: Xiaowei Li Zhijie Xu Lan Jiang Yaoming Shi Andong Wang Lingling Huang Qunshuo Wei Source Type: research