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Issue 1 • Feb.-2017
Showing 1-25 of 109
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Widely Tunable Fiber Optical Parametric Oscillators With Idler Removal Filter
Kwok Shien Yeo;Muhammad Hafiz Abu Bakar;Faisal Rafiq Mahamd Adikan;Mohd Adzir Mahdi
Publication Year: 2017,Article Sequence Number: 1400109
Cited by: Papers (3)
The properties of the singly resonant and double-pass pump fiber optical parametric oscillators (FOPO) are experimentally investigated. An idler removal filter is utilized to eliminate the idler component in a Fabry-Pérot cavity to minimize the effect of modulation instability. For singly resonant FOPO, the pump is also filtered out and leaves the signal to oscillate in the cavity. For double-pass...Show More
Multiwavelength Mid-Infrared Laser Generation Based on Optical Parametric Oscillation and Intracavity Difference Frequency Generation
Publication Year: 2017,Article Sequence Number: 1500107
Cited by: Papers (4)
We report a multiwavelength mid-infrared laser based on intracavity difference frequency generation in an MgO-doped periodically poled LiNbO3 optical parametric oscillator, which was pumped by a dual-wavelength fiber MOPA consisting of two parts: dual-wavelength seed and power amplifier. The maximum output power of the linearly polarized pump laser was 65.3 W, and the wavelengths were 1060 and 108...Show More
Compact and Flexible Dual-Wavelength Laser Generation in Coaxial Diode-End-Pumped Configuration
Yang Liu;Kai Zhong;Jialin Mei;Maorong Wang;Shibei Guo;Chu Liu;Degang Xu;Wei Shi;Jianquan Yao
Publication Year: 2017,Article Sequence Number: 1500210
Cited by: Papers (9)
A novel coaxial diode-end-pumping configuration with combined two laser crystals was proposed for simultaneous, compact, and flexible dual-wavelength laser generation. Theoretical simulations showed that by balancing the gain in both laser crystals by varying the pump focusing depth or pump wavelength, the power ratio for each wavelength could be tuned for either continuous wave or Q-switched oper...Show More
Current- and Feedback-Induced State Bistability in a 1550 nm-VCSEL With Negative Optoelectronic Feedback
Jian-Jun Chen;Zheng-Mao Wu;Tao Deng;Xi Tang;Xin Yang;Guang-Qiong Xia
Publication Year: 2017,Article Sequence Number: 1500310
Cited by: Papers (2)
We investigate experimentally the state bistability driven by current or feedback in a 1550 nm vertical-cavity surface-emitting laser (1550 nm-VCSEL) with negative optoelectronic feedback (NOEF). The results show that through continuously varying the controlled parameters such as the bias current or the feedback strength along different routes, under a set of given system parameters, there may exi...Show More
Control of Vortex Helicity With a Quarter-Wave Plate in an Er:YAG Ceramic Solid State Laser
Qiyao Liu;Yongguang Zhao;Wei Zhou;Jianing Zhang;Li Wang;Weichao Yao;Deyuan Shen
Publication Year: 2017,Article Sequence Number: 1500408
Cited by: Papers (4)
In this paper, we research the characteristics of the Laguerre-Gaussian (LG01) beams generated in an Er:YAG ceramic solid state laser pumped by an annular beam. The generated two LG01 beams (LG0,+1 and LG0,−1 modes) were found to have different thermally induced polarization behaviors and alternately existed in the resonator; then, a novel method was proposed and experimentally demonstrated to co...Show More
All-Fiber Laser With Intracavity Acousto-Optic Dynamic Mode Converter for Efficient Generation of Radially Polarized Cylindrical Vector Beams
Leticia Carrión-Higueras;Erica P. Alcusa-Sáez;Antonio Díez;Miguel V. Andrés
Publication Year: 2017,Article Sequence Number: 1500507
Cited by: Papers (14)
We report an all-fiber laser that emits a radially polarized cylindrical vector beam (CVB) at 1 μm based on an intracavity acousto-optic mode converter. We efficiently generate the CVB, taking advantage of the acousto-optic coupling from the HE11 mode to the TM01 mode in a two-mode fiber. The laser can be switched from emitting a Gaussian-like beam to a radially polarized CVB. Radially polarized C...Show More
Mode-Hopping-Free Single-Longitudinal-Mode Actively Q-Switched Ring Cavity Fiber Laser With an Injection Seeding Technique
Wencai Li;Haowei Liu;Ji Zhang;Bo Yao;Sujuan Feng;Li Wei;Qinghe Mao
Publication Year: 2017,Article Sequence Number: 1500607
Cited by: Papers (12)
With a fiber pigtailed electro-optic modulator as the active Q-switch, mode-hopping-free single-longitudinal-mode pulses are generated by a ring cavity fiber laser based on the injection seeding technique. The experimental results show that the single-longitudinal-mode oscillating properties of the laser may be determined by the power and the center frequency of the injection seed rather than the ...Show More
Theoretical Comparison of NPR and Hybrid Mode-Locked Soliton Thulium-Doped Fiber Lasers
Yanjia Lyu;Jianfeng Li;Yunxiao Hu;Yazhou Wang;Chen Wei;Yong Liu
Publication Year: 2017,Article Sequence Number: 1500711
Cited by: Papers (16)
The evolutions and properties of solitons in a thulium-doped fiber laser hybrid mode-locked by the coaction of nonlinear polarization rotation (NPR) and a semiconductor saturable absorber mirror (SESAM) have been numerically investigated. The mode-locking threshold can be greatly reduced by inserting a SESAM into the NPR-based mode-locked laser cavity. The features of solitons in this hybrid mode-...Show More
Deeply Etched Inner-Cavity Pit Reflector
M. Dernaika;L. Caro;N. P. Kelly;J. K. Alexander;F. Dubois;P. E. Morrissey;F. H. Peters
Publication Year: 2017,Article Sequence Number: 1500808
Cited by: Papers (7)
A deeply etched pit reflector is presented in this paper. The pit is not depth sensitive and has a comparable reflection and loss to a slot. Moreover, a two-section 750 μm laser cavity based on the pits is demonstrated. The laser achieved a side-mode suppression ratio of 40 dB, a linewidth of 280 KHz, and tuning across 40 nm.Show More
Deeply Etched Inner-Cavity Pit Reflector
M. Dernaika;L. Caro;N. P. Kelly;J. K. Alexander;F. Dubois;P. E. Morrissey;F. H. Peters
Year: 2017 | Volume: 9 | Issue: 1
Nearly Degenerate Four-Wave Mixing in Single-Mode Fabry–Pérot Laser Diode Subject to Single Beam Optical Injection
Publication Year: 2017,Article Sequence Number: 1600114
Cited by: Papers (2)
In this paper, nearly degenerate four-wave mixing created by pump-probe structure with small frequency spacing and enough high power is demonstrated and discussed by introducing single optical beam into single-mode Fabry-Pérot laser diode, in which the injected beam is called the probe wave, whose frequency detuning is controlled within ±50 GHz, and lasing resonance mode such as dominant mode or a...Show More
The Design of Diffuse Reflective Off-Axis Surface for Noncircular LED Arrays
Publication Year: 2017,Article Sequence Number: 1600210
Cited by: Papers (8)
The diffuse reflection light-emitting diode (LED) lighting system is widely used in many areas with its advantages of high uniformity. In order to optimize the lighting performance of noncircular LED arrays, especially illumination efficiency, this paper proposed an off-axis design method for diffuse reflective surface, a mathematical model of a diffuse reflective off-axis surface based on noncirc...Show More
The Design of Diffuse Reflective Off-Axis Surface for Noncircular LED Arrays
Year: 2017 | Volume: 9 | Issue: 1
Enhanced Light Emission of Er(Yb/Y) Silicates at the Wavelength of 1.53 $\mu$m With Au Plasmonic Arrays
Publication Year: 2017,Article Sequence Number: 1600309
In this paper, we present a novel method to increase photoluminescence (PL) efficiency at the wavelength of 1.53 μm (λ = 1.53 μm) by depositing Au plasmonic arrays on SiO2/Er(Yb/Y) silicates. Theoretical analysis reveals that the PL enhancement is caused by the resonant coupling of surface plasmon polaritons from photoemission in Er(Yb/Y) and the electric field of incident light at the Au/SiO2 int...Show More
Enhanced Performance of Perovskite Light-Emitting Devices With Improved Perovskite Crystallization
Yue-Feng Liu;Yi-Fan Zhang;Ming Xu;Zhen-Yu Zhang;Jifang Tao;Yuandong Gu;Jing Feng;Hong-Bo Sun
Publication Year: 2017,Article Sequence Number: 1600408
Cited by: Papers (2)
In this paper, we have demonstrated an efficient perovskite light-emitting device (PeLED) by improving perovskite crystallization. The improved perovskite crystallization has been achieved by pretreating the underneath poly (3, 4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS) layer with N, N-dimethylformamide (DMF) solvent before single-step spin-coating the perovskite, which results...Show More
Octave-Spanning Supercontinuum Generation From an NALM Mode-Locked Yb-Fiber Laser System
Zhengru Guo;Qiang Hao;Song Yang;Tingting Liu;Hong Hu;Heping Zeng
Publication Year: 2017,Article Sequence Number: 1600507
Cited by: Papers (11)
We demonstrate a broadband all polarization-maintaining Yb-fiber laser system that provides 137-nJ pulse at 140-fs duration. The pulses are generated in a passively mode-locked laser in which the nonlinear amplifying loop mirror acts as the mode locker, an integrated nonreciprocal device biases π/2 phase shift to reduce the mode locking threshold, and a pair of gratings are involved to force the o...Show More
Accurate Hologram Generation Using Layer-Based Method and Iterative Fourier Transform Algorithm
Hui Pang;Jiazhou Wang;Axiu Cao;Man Zhang;Lifang Shi;Qiling Deng
Publication Year: 2017,Article Sequence Number: 2200108
Cited by: Papers (16)
Random phase is always added to the object to diffuse the object light in computer-generated holograms. However, this addition causes considerable speckle noise in the reconstructed image. For improving the speckle noise problem, we propose a new method, which can reconstruct the 3-D object with higher image quality. A virtual intermediate plane is introduced between the object and the hologram pl...Show More
Ultrastrong Graphene Absorption Induced by One-Dimensional Parity-Time Symmetric Photonic Crystal
Peichao Cao;Xiangbo Yang;Shiqi Wang;Yuehua Huang;Nana Wang;Dongmei Deng;Chengyi Timon Liu
Publication Year: 2017,Article Sequence Number: 2200209
Cited by: Papers (23)
A novel microcavity structure based on 1-D parity-time (PT) symmetric photonic crystal (PC) is presented to get the embedded monolayer graphene absorption enhanced significantly, which paves a path to achieve ultrastrong, controllable, and anisotropic graphene absorption for incident eigenfrequency wave from near infrared to visible. When oscillation of absorption is at the center of the PT broken...Show More
Bistable Smart Window Based on Ionic Liquid Doped Cholesteric Liquid Crystal
Publication Year: 2017,Article Sequence Number: 2200307
Cited by: Papers (38)
We develop a bistable smart window based on mixture of negative dielectric nematic liquid crystal, chiral dopant, and chiral ionic liquid (CIL). The developed smart window is driven by dual-frequency modulation, where the transparent state is turned on under an electric field with high frequency (4 kHz), and the scattering state is switched on by an electric field with low frequency (20 Hz). The d...Show More
Bistable Smart Window Based on Ionic Liquid Doped Cholesteric Liquid Crystal
Year: 2017 | Volume: 9 | Issue: 1
A Tunable Polarization Beam Splitter Based on Magnetic Fluids-Filled Dual-Core Photonic Crystal Fiber
Jianshuai Wang;Li Pei;Sijun Weng;Liangying Wu;Lin Huang;Tigang Ning;Jing Li
Publication Year: 2017,Article Sequence Number: 2200410
A tunable polarization beam splitter (PBS) is proposed based on a dual-core photonic crystal fiber (DCPCF). The DCPCF is filled with magnetic fluids in the air holes, whose refractive index varies with the magnetic field strength. The two polarized modes are separated into the two cores at the output ports in a magnetic-free condition. When magnetic field is applied, the output intensities of the ...Show More
Optical Cryptanalysis Method Using Wavefront Shaping
Publication Year: 2017,Article Sequence Number: 2200513
Cited by: Papers (10)
Optical techniques for information security have drawn a lot of attention in recent years. The development of cryptanalysis strategies will also have a positive promotion for the cryptosystems themselves. However, most of the present publications on cryptanalysis of optical cryptosystems are focusing only on theoretical analysis but not on experimental verification. In this paper, a practical opti...Show More
MultiParameter Fiber-Optic Sensor for Simultaneous Measurement of Thermal Conductivity, Pressure, Refractive Index, and Temperature
Publication Year: 2017,Article Sequence Number: 2500114
Cited by: Papers (48)
This paper presents a miniature, all-silica four/multiparameter sensor for simultaneous measurements of thermal conductivity, pressure, refractive index, and temperature of gases. The sensor is composed of multiple Fabry-Perot interferometers (FPIs) that were created at the tip of a standard optical fiber by a micromachining process based on selective etching and standard fiber manipulation steps....Show More
Determination of Reactive RF-Sputtering Parameters for Fabrication of SiOx Films With Specified Refractive Index, for Highly Reflective SiOx Distributed Bragg Reflector
Publication Year: 2017,Article Sequence Number: 2700116
Cited by: Papers (6)
Fabricating materials with specific refractive indices, which do not naturally exist in the nature, has always been an issue. This paper presents a method for fabricating SiOx films with specified refractive index. It is well known that the refractive index of reactively sputtered SiOx films depends on its deposition conditions; in this paper, this fact was employed to fabricate films with arbitra...Show More
Demonstration of a Silicon Photonic Circuit for Half-Add Operations Using Cascaded Microring Resonators
Publication Year: 2017,Article Sequence Number: 2700209
Cited by: Papers (3)
We report a silicon photonic circuit that can perform half-add operations using cascaded microring resonators (MRRs). Electrical pulse sequences regarded as the operands are applied to the corresponding MRRs to achieve their dynamic modulations. The final operation results are directed to the corresponding outputs in the form of light. For proof of principle, the thermo-optic modulation scheme tha...Show More
High-Speed Compressive Microscopy of Flowing Cells Using Sinusoidal Illumination Patterns
Qiang Guo;Hongwei Chen;Yuxi Wang;Yong Guo;Peng Liu;Xiurui Zhu;Zhen Cheng;Zhenming Yu;Sigang Yang;Minghua Chen;Shizhong Xie
Publication Year: 2017,Article Sequence Number: 3900111
Cited by: Papers (13)
Single-pixel imaging (SPI) exploits the sparsity structure of natural images and enables image acquisition with far fewer measurements than the number of pixels. However, current SPI devices suffer from low imaging speed and an extremely time-consuming image reconstruction operation. Photonic time-stretch (PTS) technique is demonstrated to enable high-speed structured-illumination pattern generati...Show More
Enhanced Penetration of Human Placental Tissue by SiO$_{2}$ Nanoparticles as a Result of Microneedle and Electroporation Treatments
Panchun Gu;Huajiang Wei;Guoyong Wu;Zhouyi Guo;Hongqin Yang;Yonghong He;Shusen Xie
Publication Year: 2017,Article Sequence Number: 3900210
Cited by: Papers (1)
The objective of this paper is to evaluate the penetration and accumulation of SiO2 nanoparticles (NPs) in vitro human placental tissue as a function of NP size and electroporation (EP) and microneedle (MN) treatments. The results show that the penetration and accumulation of SiO2 NPs has a significant influence on the optical properties. Optical coherence tomography (OCT) monitoring and diffuse r...Show More
Effects of Size and Distribution of Silver Nanoparticles on Directional Fluorescence Emission Enhancement
Publication Year: 2017,Article Sequence Number: 4500108
Cited by: Papers (3)
Enhanced directional fluorescence emission (DFE) is crucial for the optical signal collection by spectrometer/microscopy in biological and medical detection. In this paper, we systematically report the enhanced excitation and DFE of quantum dot (QD) by silver nanoparticles (AgNPs) through theoretical calculations. A finite difference time-domain method is used in the calculations. By changing the ...Show More
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