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Gold nanoparticles film for Q-switched pulse generation in thulium doped fiber laser cavity

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Optoelectronics Letters 2021年第8期17卷 449-453页

作者： Ahmad h.A.Rosol Afiq A.A.Jafry Norrima Mokhtar moh Yasin Sulaiman Wadi harun Department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Department of Physics Faculty of ScienceUniversiti Teknologi MalaysiaSkudai 81310Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

Passively Q-switched thulium doped fiber laser(TDFL)has been successfully demonstrated using gold nanoparticles(GNPs),which were embedded into polyvinyl alcohol as saturable absorber(SA).The stable self-starting Q-switched laser was generated to operate at 1891 nm when a tiny piece of the prepared film was slot in between two fiber ferrules and incorporated into the laser *** repetition rate can be adjusted from 48.54 khz to 49.64 khz while the pulse width decreased from 3.52μs to 2.38μs with the increase of 1550 nm pump power from 840 m W to 930 m *** corresponding pump power output power linearly increased from 3.62 m W to 6.3 m W with a slope efficiency of 2.53%.The maximum peak power and pulse energy were recorded at about 39 m W and 0.12μJ,respectively at pump power of 930 m *** Q-switching operation was caused by the surface plasmon resonance absorption of GNPs.

关键词： switched fiber pump

Vanadium pentoxide film for microsecond pulse generation in 1.5-μm region

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Optoelectronics Letters 2022年第1期18卷 29-34页

作者： mohamad F.Baharom Salam M.Azooz Ahmad h.A.Rosol moh Yasin Sulaiman Wadi harun Department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Department of Communication Engineering Engineering Technical CollegeAl-Furat Al-Awsat Technical UniversityNajafIraq Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabaya 60115Indonesia

Q-switched erbium doped fiber laser(EDFL)was passively realized using vanadium pentoxide(V_(2)O_(5))embedded into polyethylene glycol(PEG)film as saturable absorber(SA).The laser could successfully generate stable self-starting pulses when the V_(2)O_(5)film was placed in an EDFL *** operated at 1562.4 nm *** repetition rate can be varied from 91.7 khz to 128.2 khz while the pulse width shrank from 10.90μs to 7.81μs with rising pump power from 110.9 mW to 166.5 *** pulse energy recorded was 3.2 nJ at pump power of 166.5 *** results indicate that the saturable absorption of V_(2)O_(5)has promising nonlinear photonic applications especially in fiber laser development for 1.5-μm region.

关键词： pulse pump fiber

Studies on the Phase Relations of Tl-Ag-S System at 200℃

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Chinese Science Bulletin 1994年第5期39卷 414-418页

作者：钱汉东 Gnter h.moh Department of Earth Sciences Nanjing University Nanjing 210008 PRC Mineralogical-Petrology Institute Heidelberg University6900 HeidelbergGermany

In recent years, more and more geological studies on large-scale and super large-scaleAu-Ag epithermal deposits and polymetal ore doposits reveal that thallium is a typicallow-temperature metallogenetic element which ... 详细信息

关键词： TI Ag sulfides phase equilibrium experimental mineralogy.

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铊-锗-硫三元素相平衡的实验研究

矿物学报 1993年第3期13卷 237-243页

作者：杨家(王余) Gunter h.moh 中国有色金属总公司矿产地质研究院桂林541004 联邦德国海德堡大学矿物岩石研究所

本文用抽真空石英管在干体系中对Tl-Ge-S三元系在300℃等温切面相关系和沿Tl_2-GeS_2及Tl_2-GeS变温切面假二元系相平衡进行了实验研究。 Tl-Ge-S三元系在300℃为三个液相区与三个二元相、八个三元相(包括三个固溶体)和十四个两相区、... 详细信息

本文用抽真空石英管在干体系中对Tl-Ge-S三元系在300℃等温切面相关系和沿Tl_2-GeS_2及Tl_2-GeS变温切面假二元系相平衡进行了实验研究。 Tl-Ge-S三元系在300℃为三个液相区与三个二元相、八个三元相(包括三个固溶体)和十四个两相区、二十四个三相区稳定共存的复杂相关系。本实验首次合成了三个三元相(Tl_2Ge_(1-x)S_2、Tl_5Ge_(13)S_(24)、TlGe_3S_5)和三个固溶体相,即S·S·a(Tl_2^+Ge^(4+)S_3～Tl_2^+Ge_2^(2+)S_3)、S·S·b(Tl^+Ge_(0.5)^(2+)Ge_(0.5)^(4+)S_2～Tl^+Ge_3^(2+)S_4),S·S·c(Tl^+Ge_2^(2+)S_3～Tl_2^+Ge_5S_6)。

关键词：矿物相平衡铊锗硫酸盐

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Tl-In-S三元系的实验研究

地质论评 1993年第3期39卷 231-235页

作者：徐珏 Günter.h.moh 中国地质科学院矿床地质研究所海德堡大学矿物岩石研究所

作者通过T1—In-S三元系实验研究,在300℃等温面上发现4个三元固溶体相和2个三元相。4个三元固溶体相的成分变化范围分别是:(Ⅰ)T1_(2C)InS_(16)-T1_(40)In_3S_(33);(Ⅱ)T1_4InS_5—T1_4InS_4;(Ⅲ)T1_8In_2S_7—T1_(15)In_3S_(11)和(Ⅳ)T1_2In_2S_5。2个三元相的成分分别是T1_3InS_3和T1_2In_2S_3。这些相之间的关系清楚地示于T1-In-S相图中。此外,在600℃时合成了三元相T1In_2S_3,并对前人的实验研究进行了补充和修正。

关键词：钛铟硫三元系合成实验相图

Q-switched pulse generation in a bidirectionally pumped EDFL utilizing Lu_(2)O_(3) as saturable absorber

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Optoelectronics Letters 2021年第9期17卷 529-533页

作者： Nur F.Zulkipli Ahmad h.A.Rosol Sheriff A.Sadik Firat E.Durak Ahmet Altuncu moh Yasin Sulaiman W.harun Department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Photonics Technologies Application and Research Center(FOTAM) Kütahya Dumlupinar UniversityKiltahya 43100Turkey Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this paper,we have successfully demonstrated a Q-switched pulse generation utilizing lutetium oxide(Lu2O3)thin film based saturable absorber(SA)in all-fiber erbium-doped fiber laser(EDFL)cavity with a bidirectional *** Lu2O3 powder is mixed with isopropyl alcohol(IPA)solution before we add polyvinyl alcohol(PVA)as our host polymer to make the Lu2O3 into a thin *** inserting the Lu2O3-PVA thin film into a bidirectional pumped EDFL cavity,a stable Q-switched pulse is realized with repetition rate in a range of rose from 43.67 k hz to 57.74 k hz whereas the pulse width decreased from 14.48μs to 11.20μ*** result indicates that the Lu2O3 can be implemented as an SA device in an EDFL as it owns a linear absorption of around 3 d B at 1567 nm.

关键词： switched pumped pulse

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Tl—Ga—S三元系的合成实验研究

岩石矿物学杂志 1993年第1期12卷 40-44页

作者：徐珏 Günter h.moh 中国地质科学院矿床地质研究所北京100037 德国海德堡大学

作者系统地进行了Tl—Ga—S三元系的合成实验研究。在300℃等温面上,发现了四个新相,Tl_4GaS_5为三元纯相,Ⅰ、Ⅱ、Ⅲ为固溶体相区,其成分变化范围分别是:(Ⅰ)Tl_(20)GaS_(16)—Tl_(20)Ga_2S_(17),(Ⅱ)Tl_(10)Ga_6S_(17)—Tl_5Ga_3S_7,(Ⅲ)Tl_2Ga_2S_5—TlGaS_2。此外,在630—900℃还存在一个成分为TlGa_5S_8—Tl_2Ga_(10)S_(11)的固溶体相。对这些新相均进行了X-射线粉晶衍射、光性及某些物性测试。X-射线粉晶衍射数据已进行了指标化。

关键词：铊镓硫三元素合成固溶体相

ThE F-2 REGION OF ThE IONOSPhERE AT WUChANG DURING ThE SOLAR ECLIPSE OF MAY 9, 1948

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中国物理学报 1951年第3期 197-206页

作者： C.T.KWEI P.h.LIANG J.h.moh W.ChOW Ionosphere Laboratory Wuhan University Wuchang Wuchang at the Institute of Geophysics and Mctcorology Academia Sinica

From data obtained during the eclipse and on control days,the effective coefficient of recombinationfor F-2 layer is found to be 4×10-10cm3/electron per *** magnitude of α is apparently afunction of the height of the layer which becomes lower with increasing *** eruptionsmay be associated with two of the discontinuities of the eclipse *** thickness of the F-2 layerbecame compressed and dropped as a whole during the eclipse,possibly due to air movement causedby lowering of *** sporadic E layer was not influenced by the change of solar radiation,and must be due to other causes.

关键词： ThE F-2 REGION OF ThE IONOSPhERE AT WUChANG DURING ThE SOLAR ECLIPSE OF MAY 9,1948 AT

3D optical vortices generated by micro-optical elements and its novel applications

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Optoelectronics Letters 2007年第2期3卷 136-140页

作者： BU J. LIN J. K. J. moh B. P. S. Ahluwalia ChEN h. L. PENG X. NIU h. B. YUAN X.C. Institute of Optoelectronics Key Laboratory of Optoelectronic Devices and Systems of Chinese Education Ministry Shenzhen University Shenzhen 518060 China School of Electrical ＆ Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore

In this paper we report on recent development in the areas of optical vortices generated by micro-optical elements and applications of optical vortices, including optical manipulation, radial polarization and secure f... 详细信息

关键词：微光学器件三维光学涡流应用光线极化自由空间光通信