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| 1 | Temperature-controlled mode selection of Er-doped random fiber laser with disordered Bragg gratings显示文摘In this paper, we proposed a way to realize an Er-doped random fiber laser(RFL) with a disordered fiber Bragg grating(FBG) array, as well as to control the lasing mode of the RFL by heating specific locations of the disordered FBG array. The disordered FBG array performs as both the gain medium and random distributed reflectors, which together with a tunable point reflector form the RFL. Coherent multi-mode random lasing is obtained with a threshold of between 7.5 and 10 mW and a power efficiency between 23% and 27% when the reflectivity of the point reflector changes from 4% to 50%. To control the lasing mode of random emission, a specific point of the disordered FBG array is heated so as to shift the wavelength of the FBG(s) at this point away from the other FBGs.Thus, different resonance cavities are formed, and the lasing mode can be controlled by changing the location of the heating point. | W.L.Zhang Y.B.Song X.P.Zeng R.Ma Z.J.Yang Y.J.Rao | 2016 | Photonics Research2016，4，3： | 4 |
| 2 | Generation of cascaded four-wave-mixing with graphene-coated microfiber显示文摘A graphene-coated microfiber(GCM)-based hybrid waveguide structure formed by wrapping monolayer graphene around a microfiber with length of several millimeters is pumped by a nanosecond laser at ~1550 nm, and multiorder cascaded four-wave-mixing(FWM) is effectively generated. By optimizing both the detuning and the pump power, such a GCM device with high nonlinearity and compact size would have potential for a wide range of FWM applications, such as phase-sensitive amplification, multi-wavelength filter, all-optical regeneration and frequency conversion, and so on. | Y.Wu B.C.Yao Q.Y.Feng X.L.Cao X.Y.Zhou Y.J.Rao Y.Gong W.L.Zhang Z.G.Wang Y.F.Chen K.S.Chiang | 2015 | Photonics Research2015，3，2： | 1 |
| 3 | INFLUENCES OF NEODYMIUM ON MAGNETIC CHARACTERISTICS OF ELECTROPLATING CoNdNiMnP FILMS显示文摘In order to improve the performances of electroplating permanent magnetic films, neodymium is introduced into the electroplating CoNiMnP permanent magnetic films. The influences of the neodymium content are also investigated by varying NdCl3 plating bath concentration. The neodymium-doped films are analyzed by energy dispersive spectrum (EDS), vibrating sample magnetometer (VSM) and magnetic force microscope (MFM). The experimental results show that high magnetic performances of CoNdNiMnP permanent magnetic films with vertical anisotropy could be fabricated with current density 5mA/cm2 at room temperature. With the increasing of neodymium contents, the magnetic properties of films were improved. However when neodymium contents exceeded 3.5wt%, the magnetic properties of films are not improved any more. The increase of film magnetic properties results from the ferromagnetic-coupling between light rare earth element-neodymium and transition metal element-cobalt. | H.C.Jiang W.L.Zhang J.P.Zhang W.X.Zhang B.Peng S.Q.Yang | 2005 | Acta Metallurgica Sinica(English Letters)2005，18，2： | 0 |
| 4 | Hot Corrosion Behavior of Hf-Doped NiAl Coating in the Mixed Salt of Na_(2)SO_(4)+K_(2)SO_(4)at 900℃显示文摘The hot corrosion behavior of the NiAl coating and the 5Hf-NiAl coating induced by mixed salt at 900℃was investigated.Comparing with the NiAl coating,the 5Hf-NiAl coating exhibited superior hot corrosion resistance because the addition of Hf promoted the formation of protective oxide scale and reduced the growth rate of oxide scale.Therefore,internal sulfides were not present in the 5Hf-NiAl coating after hot corrosion for 140 h.Cr exhibited different distribution in the two coatings since the addition of Hf changed the hot corrosion process of the coating.Hf and Ti in the 5Hf-NiAl coating trapped and captured sulfur,preventing the penetration of sulfur into the coating.The hot corrosion mechanism of the two coating and the effects of Hf on this process were discussed in this work. | W.L.Zhang W.Li L.B.Fu X.Peng J.Sun S.M.Jiang J.Gong C.Sun | 2023 | Acta Metallurgica Sinica(English Letters)2023，36，9： | 0 |
| 5 | THE INFLUENCES OF SOLUTION PH AND CURRENT DENSITY ON COERCIVITY OF ELECTROPLATING CoNdNiMnP PERMANENT MAGNETIC ALLOY FILM ARRAYS显示文摘The influences of plating bath solution PH and current density on coercivity of electroplating CoNdNiMnP permanent magnetic film arrays were studied. The experiment results show that both for solution PH and current density there were the best depositing parameters. Too high and too low plating bath solution PH or current density both result in decreasing of the film array coercivity. When solution PH is 3.5 and current density is 5mA/cm2, the prepared film array coercivity can reach the maximum. | H.C.Jiang W.L.Zhang J.P.Zhang W.X.Zhang B.Peng S.Q.Yang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，5： | 0 |
| 6 | Formation process and oxidation behavior of MCrAlY+AlSiY composite coatings on a Ni-based superalloy显示文摘An AlSiY coating and two MCrAlY+AlSiY composite coatings with different thickness of MCrAlY interlayer were prepared by arc ion plating(AIP)and vacuum annealing.The isothermal oxidation behavior of coatings at 1100℃ for 300 h was also investigated to characterize the microstructure evolution of coatings during annealing.The composite coatings exhibited a better high-temperature oxidation resistance at 1100℃ .The reason is that the addition of MCrAlY layer can greatly contribute to prevent the diffusion of refractory elements to the outer layer.The inhibition of Al inward diffusion can be much stronger,as the Si content increases in the outer layer during annealing. | S.M.Li L.B.Fu W.L.Zhang W.Li J.Sun T.G.Wang S.M.Jiang J.Gong C.Sun | 2022 | Journal of Materials Science & Technology2022，，25： | 0 |
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