Photonics最新文献_第9页

High-Dynamic-Range Absorption Spectroscopy by Generating a Wide Path-Length Distribution with Scatterers 通过散射体产生宽路径长度分布实现高动态范围吸收光谱学

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-13 DOI: 10.3390/photonics11060556

Ayaka Mori, Kyohei Yamashita, Eiji Tokunaga

{"title":"High-Dynamic-Range Absorption Spectroscopy by Generating a Wide Path-Length Distribution with Scatterers","authors":"Ayaka Mori, Kyohei Yamashita, Eiji Tokunaga","doi":"10.3390/photonics11060556","DOIUrl":"https://doi.org/10.3390/photonics11060556","url":null,"abstract":"In absorption spectroscopy, it is challenging to detect absorption peaks with significant differences in their intensity in a single measurement. We enable high-dynamic-range measurements by dispersing scatterers within a sample to create a broad distribution of path lengths (PLs). The sample is placed within an integrating sphere (IS) to capture all scattered light of various PLs. To address the complexities of PLs inside the IS and the sample, we performed a ray-tracing simulation using the Monte Carlo (MC) method, which estimates the measured absorbance A and PL distribution from the sample’s absorption coefficient µa and scattering properties at each wavelength λ. This method was validated using dye solutions with two absorption peaks whose intensity ratio is 95:1, employing polystyrene microspheres (PSs) as scatterers. The results confirmed that both peak shapes were delineated in a single measurement without flattening the high absorption peak. Although the measured peak shapes A(λ) did not align with the actual peak shapes µa(λ), MC enabled the reproduction of µa(λ) from A(λ). Furthermore, the analysis of the PL distribution by MC shows that adding scatterers broadens the distribution and shifts it toward shorter PLs as absorption increases, effectively adjusting it to µa.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141348223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Repetition-Rate 2.3–2.7 µm Acousto-Optically Tuned Narrow-Line Laser System Comprising Two Master Oscillators and Power Amplifiers Based on Polycrystalline Cr2+:ZnSe with the 2.1 µm Ho3+:YAG Pulsed Pumping 高重复率 2.3-2.7 µm 声光调谐窄行激光系统，包括两个基于多晶 Cr2+:ZnSe、采用 2.1 µm Ho3+:YAG 脉冲泵浦的主振荡器和功率放大器

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-12 DOI: 10.3390/photonics11060555

Oleg Antipov, I. Eranov, S. Balabanov, Anton Dobryinin, Y.A. Getmanovskiy, Valeriy Sharkov, Nikolay Yudin

{"title":"High-Repetition-Rate 2.3–2.7 µm Acousto-Optically Tuned Narrow-Line Laser System Comprising Two Master Oscillators and Power Amplifiers Based on Polycrystalline Cr2+:ZnSe with the 2.1 µm Ho3+:YAG Pulsed Pumping","authors":"Oleg Antipov, I. Eranov, S. Balabanov, Anton Dobryinin, Y.A. Getmanovskiy, Valeriy Sharkov, Nikolay Yudin","doi":"10.3390/photonics11060555","DOIUrl":"https://doi.org/10.3390/photonics11060555","url":null,"abstract":"High-average-power narrow-linewidth tunable solid-state lasers in the wavelength region between 2 and 3 μm are attractive light sources for many applications. This paper reports a narrow-linewidth widely tunable laser system based on the polycrystalline Cr2+:ZnSe elements pumped by repetitively pulsed 2.1 µm Ho3+:YAG laser operating at a pulse rate of tens of kilohertz. An advanced procedure of ZnSe element doping and surface improvement was applied to increase the laser-induced damage threshold, which resulted in an increase in the output power of the Cr2+:ZnSe laser system. The high-average-power laser system comprised double master oscillators and power amplifiers: Ho3+:YAG and Cr2+:ZnSe laser oscillators, and Ho3+:YAG and Cr2+:ZnSe power amplifiers. The output wavelength was widely tuned within 2.3–2.7 µm by means of an acousto-optical tunable filter inside a Cr2+:ZnSe master oscillator cavity. The narrow-linewidth operation at the pulse repetition rate of 20–40 kHz in a high-quality beam with an average output power of up to 9.7 W was demonstrated.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods Controlling Radiation Parameters of Mode-Locked All-Fiberized Lasers 模式锁定全光纤激光器辐射参数的控制方法

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-12 DOI: 10.3390/photonics11060552

S. Kobtsev

引用次数: 0

Monte Carlo Simulation of Quantum-Cutting Nanocrystals as the Luminophore in Luminescent Solar Concentrators 量子切割纳米晶体作为发光太阳能聚光器发光体的蒙特卡罗模拟

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-12 DOI: 10.3390/photonics11060553

Qi Nie, Wenqi Li, Xiao Luo

引用次数: 0

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator 基于光子晶体和环形谐振器内大半径介质柱的通道滤波器设计

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-12 DOI: 10.3390/photonics11060554

Ailing Zhang, Xiangyu Yang, Junfeng Wang

引用次数: 0

Long-Term Stability Test for Femtosecond Laser-Irradiated SnO2-Nanowire Gas Sensor for C7H8 Gas Sensing 用于 C7H8 气体传感的飞秒激光辐照 SnO2 纳米线气体传感器的长期稳定性测试

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-11 DOI: 10.3390/photonics11060550

Sanghoon Ahn, Kang Woo Chun, Changkyoo Park

{"title":"Long-Term Stability Test for Femtosecond Laser-Irradiated SnO2-Nanowire Gas Sensor for C7H8 Gas Sensing","authors":"Sanghoon Ahn, Kang Woo Chun, Changkyoo Park","doi":"10.3390/photonics11060550","DOIUrl":"https://doi.org/10.3390/photonics11060550","url":null,"abstract":"In this study, femtosecond (FS) laser irradiation with different laser energy densities of 138, 276, and 414 mJ/cm2 is applied to SnO2-nanowire (NW) gas sensors, and the effect of the FS laser irradiation on the gas sensor response toward toluene (C7H8) gas is investigated. The FS laser irradiation causes oxygen deficiency in the SnO2 NWs and forms SnO and SnOx. Moreover, an embossing surface with multiple nano-sized bumps is created on the SnO2 NW surface because of the FS laser irradiation. The FS laser-irradiated SnO2-NW gas sensor exhibits superior sensing performance compared with the pristine SnO2-NW gas sensor. Moreover, the FS laser energy density significantly affects gas-sensing performance, and the highest sensor response is achieved by the gas sensor irradiated at 138 mJ/cm2. The long-term stability test of the laser-irradiated SnO2-NW gas sensor is performed by comparing fresh and 6-month-old gas sensors in different gas concentrations and relative humidity levels. Comparable gas-sensing behaviors are examined between the fresh and 6-month-old gas sensor, and this verifies the robustness of the laser-irradiated SnO2-NW gas sensor.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mathieu–Hill Equation Stability Analysis for Trapped Ions: Anharmonic Corrections for Nonlinear Electrodynamic Traps 捕获离子的马修-希尔方程稳定性分析：非线性电动力学陷阱的谐波修正

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-11 DOI: 10.3390/photonics11060551

B. Mihalcea

{"title":"Mathieu–Hill Equation Stability Analysis for Trapped Ions: Anharmonic Corrections for Nonlinear Electrodynamic Traps","authors":"B. Mihalcea","doi":"10.3390/photonics11060551","DOIUrl":"https://doi.org/10.3390/photonics11060551","url":null,"abstract":"The stability properties of the Hill equation are discussed, especially those of the Mathieu equation that characterize ion motion in electrodynamic traps. The solutions of the Mathieu-Hill equation for a trapped ion are characterized by employing the Floquet theory and Hill’s method solution, which yields an infinite system of linear and homogeneous equations whose coefficients are recursively determined. Stability is discussed for parameters a and q that are real. Characteristic curves are introduced naturally by the Sturm–Liouville problem for the well-known even and odd Mathieu equations cem(z,q) and sem(z,q). In the case of a Paul trap, the stable solution corresponds to a superposition of harmonic motions. The maximum amplitude of stable oscillations for ideal conditions (taken into consideration) is derived. We illustrate the stability diagram for a combined (Paul and Penning) trap and represent the frontiers of the stability domains for both axial and radial motion, where the former is described by the canonical Mathieu equation. Anharmonic corrections for nonlinear Paul traps are discussed within the frame of perturbation theory, while the frontiers of the modified stability domains are determined as a function of the chosen perturbation parameter and we demonstrate they are shifted towards negative values of the a parameter. The applications of the results include but are not restricted to 2D and 3D ion traps used for different applications such as mass spectrometry (including nanoparticles), high resolution atomic spectroscopy and quantum engineering applications, among which we mention optical atomic clocks and quantum frequency metrology.","PeriodicalId":20154,"journal":{"name":"Photonics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Highly Sensitive Plasmonic Graphene-Based Structure for Deoxyribonucleic Acid Detection 用于脱氧核糖核酸检测的高灵敏度石墨烯基等离子结构

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-09 DOI: 10.3390/photonics11060549

Z. Salehnezhad, M. Soroosh, Haraprasad Mondal

引用次数: 0

Low-Power-Consumption and Broadband 16-Channel Variable Optical Attenuator Array Based on Polymer/Silica Hybrid Waveguide 基于聚合物/二氧化硅混合波导的低功耗、宽带 16 通道可变光衰减器阵列

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-08 DOI: 10.3390/photonics11060547

Shengyuan Zhang, Yuexin Yin, Zihao Wang, Yafan Li, Yuan Zhang, Mengke Yao, Daming Zhang, Ye Li

引用次数: 0

Temporal Analysis of Speckle Images in Full-Field Interferometric and Camera-Based Optical Dynamic Measurement 全场干涉测量和基于相机的光学动态测量中斑点图像的时间分析

IF 2.4 4区物理与天体物理

Photonics Pub Date : 2024-06-08 DOI: 10.3390/photonics11060548

Guojun Bai, Yuchen Wei, Bing Chen, Yu Fu

引用次数: 0