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Tunable Second Harmonic Generation with High Conversion Efficiency in Periodically poled Lithium Niobate Channel Waveguide

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Journal of Shanghai Jiaotong university(Science) 2007年第4期12卷 517-519页

作者：徐荣辉陈险峰陈玉萍叶志清夏宇兴 Inst.of Optics & Photonics Dept.of PhysicsShanghai Jiaotong Univ. College of Physics and Communication Electronics Jiangxi Normal Univ.

The experiment on quasi-phase-matched second harmonic generation (SHG) in a channel waveguide was reported. The waveguide was made by annealed proton exchange in the periodically poled lithium niobate (PPLN) with the period of PPLN of 14.9 μm, which was designed for cascading wavelength conversion in dense wavelength division multiplexer optical communications. The measurement results of SHG conversion efficiency as a function of fundamental wavelength at room temperature fit well to sinc^2 shape. The peak of SHG conversion efficiency was 75%·W~ -1 ·cm~ -2 as well as reported. The relationship between the center fundamental wavelength and temperature shows that SHG can be effectively tuned by the temperature in PPLN waveguide.

关键词： periodically poled lithium niobate(PPLN) second harmonic generation(SHG) waveguide quasi-phase-matching

Dielectric behavior of poled complex perovskite relaxor ferroelectrics

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Chinese Science Bulletin 1997年第2期42卷 169-172页

作者： FAN Huiqing, XU Zhuo, ZHANG Liangying and YAO XiElectronic Materials Research Laboratory, Xi’an Jiaotong University, Xi’an 710049, China

RELAXOR ferroelectric ceramics with complex perovskite structure is considered as the first material chosen for multilayer capacitors (MLC) in technology and economy, because of their high permittivity, lower sintering temperature and lower capacitors changing rate with temperature (temperature coefficient) for diffuse phase transition (DPT). Thus, preparations and properties about the materials received more attention. There are many reports about their dielectric properties but there are few about their poled dielectric behavior. In the

关键词： poled dielectric behavior relaxor ferroelectrics microdomain-macrodomain.

A　Novel　Method　for　Measuring　Electro-optic　Coefficient　of　poled　Polymer　Waveguide

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Journal of Harbin Institute of Technology(New Series) 1998年第1期5卷 16-19页

作者： YANG Lijun XU Jiandong GENG Wanzhen

ＡＮｏｖｅｌＭｅｔｈｏｄｆｏｒＭｅａｓｕｒｉｎｇＥｌｅｃｔｒｏ－ｏｐｔｉｃＣｏｅｆｆｉｃｉｅｎｔｏｆＰｏｌｅｄＰｏｌｙｍｅｒＷａｖｅｇｕｉｄｅＹＡＮＧＬｉｊｕｎ，ＧＥＮＧＷａｎｚｈｅｎ，ＸＵＪｉａｎｄｏｎｇ，ＨＯＮＧ... 详细信息

ＡＮｏｖｅｌＭｅｔｈｏｄｆｏｒＭｅａｓｕｒｉｎｇＥｌｅｃｔｒｏ－ｏｐｔｉｃＣｏｅｆｆｉｃｉｅｎｔｏｆＰｏｌｅｄＰｏｌｙｍｅｒＷａｖｅｇｕｉｄｅＹＡＮＧＬｉｊｕｎ，ＧＥＮＧＷａｎｚｈｅｎ，ＸＵＪｉａｎｄｏｎｇ，ＨＯＮＧＪｉｎｇ（杨黎俊）（耿完桢）（徐建...

关键词：徐建 Coefficient poled Measuring Method 杨黎

Mid-infrared laser with 1.2 W output power based on PPLT

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Science China(Physics,Mechanics & Astronomy) 2010年第4期53卷 638-642页

作者： Lü XinJie, ZHAO Gang, LI GuiJun, GAO ZhiDa, PAN ShuDi & ZHU ShiNing National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China National Laboratory of Solid State Microstructure Nanjing University Nanjing China

The optical parametric oscillator (OPO) based on the periodically poled lithium tantalate (PPLT) crystal (40 mm×5 mm×1 mm) is fabricated. The OPO is pumped by a Q-switched Nd:YAG laser working at 1.064 μm. An average idler output power (around 3.8 μm) of 1.2 W and signal output power (around 1.48 μm) of 3 W are obtained when the pump power is 20 W.

关键词： optical superlattice mid-infrared laser optical parametric oscillator (OPO) periodically poled lithium tantalate (PPLT)

Nonlinear optical polyimide with high thermal stability prepared by simultaneous poling and polymerization

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Chinese Science Bulletin 2001年第10期46卷 827-831页

作者： Hu Kang Wei Wu Peiji Wu Cheng Ye Chinese Acad Sci Ctr Mol Sci Organ Solids Lab Beijing 100080 Peoples R China

The high Tg polyimide embedded with a novel imidazol-typed chromophore 2-[5-(4-nitrostilbenyl)thienyl]-4,S-di(4-aniinophenyl)imidazole (NSTDAPI) was prepared using the 'simultaneous poling and polymerization' technique. The glass transition temperature (Fg) is 304℃ and the initial decomposition temperature (Td) is 330℃. The in-situ second harmonic generation (in-situ SHG) measurement was performed to study its poling behavior and the stability of the poling-induced orientation. The nonlinear optical (NLO) coefficient d33 of poled polyimide film is 32.2 pm/V at 1064 nm fundamental wavelength. The SHG signal of the poled polymer film was quite stable below 200℃, and then began to decay rapidly above 220℃. The half-decay temperature of dipole orientation for the film is 250℃.

关键词： poled polymer functionalized polyimide simultaneous poling and polymerization second harmonic generation thermal stability of poling-induced orientation.