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The Resonance Peak Theory of Reflection Guidedmode Resonance Filters

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Chinese Journal of Lasers 1999年第4期8卷 26-34页

作者： FU Kexiang WANG Zhiheng ZHANG Qizhi ZHANG Jing NIE Ya (Department of Physics, Sichuan University, Chengdu 610064, China) received Oct. 20, 1998 revised manuscript received Dec. 21, 1998 四川大学物理系四川成都 610064 四川大学物理系四川成都

In this paper, the physical principle of phase grating's resonance is discussed and the basic (approximate) formulae for the resonance is presented. According to the formulae, the properties of resonance peak, including the condition for multi peak and single peak, its relation with grating film thickness, incidence angle, and grating period, is also discussed. The results are consistent with those calculated with rigorous theory. An efficient design method for controlling the single peak resonance wavelength is found.

关键词： resonance filter phase grating total reflection

Investigation of Surface-Enhanced Raman Spectra of Human Gallstones on Colloidal Silver

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Chinese Journal of Lasers 2000年第5期9卷 56-61页

作者： LIU Gang XING Da TAN Shici (Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China) received Jan. 6, 2000 revised manuscript received March 14, 2000 华南师范大学广东广州

The surface enhanced Raman scattering (SERS) spectra of human gallstones is investigated. Complicated Raman bands were due to multiple components that include bilirubin, bilirubinate salts, cholesterol, fatty salts and proteins. The results suggest that besides bilirubin and cholesterol, fatty salts and proteins may.play an important role in the formation of gallstone. The experimental data supply an useful information for the research of the formation mechanism of gallstones.

关键词： gallstone SERS Raman spectrum

Analysis of Volume Hologram Using Fresnel Coefficient Matrix

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Chinese Journal of Lasers 1999年第4期8卷 3-5页

作者： LI DeNow is working in the Institute of Military Police LIU Dahe (Department of Physics, Beijing Normal University, Beijing 100875, China) received Oct. 26, 1998 revised manuscript received Feb. 28, 1999 北京师范大学物理系北京 100875 北京师范大学物理系北京

The spectral characteristics of volume hologram is analyzed using Fresnel coefficient matrix The volume hologram is treated as a medium in which the refractive index changes continuously The analysis is in good co... 详细信息

关键词： volume hologram Fresnel coefficient matrix diffraction spectrum

Glass ceramic of high hardness and fracture toughness developed from iron-rich wastes

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Acta Metallurgica Sinica(English Letters) 2009年第3期22卷 181-190页

作者： Weixin HAN Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China manuscript received 27 October 2008 in revised form 17 November 2008 [a]Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A study has been carried out on the feasibility of using high iron content wastes, generated during steel making, as a raw material for the production of glass ceramic. The iron-rich wastes were mixed and melted in different proportions with soda-lime glass cullet and sand. The devitrification of the parent glasses produced from the different mixtures was investigated using differential thermal analysis, X-ray diffraction, and scanning electron microscopy. The mechanical properties of the glass-ceramic were assessed by hardness and indentation fracture toughness measurement. A glass ceramic with mixture of 60 wt pct iron-rich wastes, 25 wt pct sand, and 15 wt pct glass cullet exhibited the best combination of properties, namely, hardness 7.9 CPa and fracture toughness 3.75 MPa·m^1/2, for the sake of containing magnetite in marked dendritic morphology. These new hard glass ceramics are candidate materials for wear resistant tiles and paving for heavy industrial floors.

关键词： Iron-rich wastes Glass ceramics Vitrification Hardness

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Discussion forthe Semiinfinite Medium Approximation and the Thermal Diffusion Velocity in Laser Heat Treatment

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Chinese Journal of Lasers 1999年第4期8卷 90-96页

作者： LI Junchang LI Xingyi CHEN Jingbo FAN Zebin CHEN Qinghua (Kunming University of Science and Technology, Kunming, 650093, China) received Dec. 14, 1998 revised manuscript received Apr. 12, 1999 昆明理工大学云南昆明 650093 昆明理工大学云南昆明

It is a conventional method to regard laser iradiated object as a semi infinite medium with invariable thermal physical property parameters for approximate analyses of thermal acting of laser heat treatment. So far, 2αt and α/t have been taken as the thermal diffusion distance and the thermal diffusion velocity respectively, at the time t after heat fluctuation in materials with a thermal diffusion coefficient α, and as a result, the feasibility of the approximately estimating method about semi infinite medium is judged. This paper indicates that, due to quantitative investigation of heat energy diffusion, the thermal diffusion distance of 3αt and the thermal diffusion velocity of 1.5α/t can more accurately describe the physical process of heat conduction. Finally, an applied example of approximately estimating the temperature field of laser heat treatment is presented.

关键词： laser heat treatment temperature field estimate thermal diffusion velocity

Automatic　Analysis　of　the　Phase　Object　Using　Projection　Moire　Deflectometry

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Chinese Journal of Lasers 1995年第6期B4卷 521-529页

作者： WANG Ming(Basic Department, Nanchang University, Nanchang 330029, China)received 22 March 1995 revised manuscript received 5 June 1995 Nanchang Univ Nanchang China

ＡｕｔｏｍａｔｉｃＡｎａｌｙｓｉｓｏｆｔｈｅＰｈａｓｅＯｂｊｅｃｔＵｓｉｎｇＰｒｏｊｅｃｔｉｏｎＭｏｉｒｅＤｅｆｌｅｃｔｏｍｅｔｒｙ￥ＷＡＮＧＭｉｎｇ（ＢａｓｉｃＤｅｐａｒｔｍｅｎｔ，ＮａｎｃｈａｎｇＵｎｉｖｅｒｓｉ... 详细信息

ＡｕｔｏｍａｔｉｃＡｎａｌｙｓｉｓｏｆｔｈｅＰｈａｓｅＯｂｊｅｃｔＵｓｉｎｇＰｒｏｊｅｃｔｉｏｎＭｏｉｒｅＤｅｆｌｅｃｔｏｍｅｔｒｙ￥ＷＡＮＧＭｉｎｇ（ＢａｓｉｃＤｅｐａｒｔｍｅｎｔ，ＮａｎｃｈａｎｇＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｃｈａｎｇ３３００２９...

关键词： projection moire deflectometry phase object

Wavelength-Flattened　1×3　Single-Mode　Fibre-Optical　Splitters

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Chinese Journal of Lasers 1995年第6期B4卷 515-520页

作者： HUANG Yong ZENG Qingji(Photonic Technology Laboratory ,Institute of Optical Fiber Technology ,Shanghai Jiao Tong University, Shanghai 200052, china)(received 21 Mar. 1995 revised manuscript received 11 may.1995) Shanghai Jiao Tong Univ Shanghai China

Ｗａｖｅｌｅｎｇｔｈ－Ｆｌａｔｔｅｎｅｄ１×３Ｓｉｎｇｌｅ－ＭｏｄｅＦｉｂｒｅ－ＯｐｔｉｃａｌＳｐｌｉｔｔｅｒｓ￥ＨＵＡＮＧＹｏｎｇ；ＺＥＮＧＱｉｎｇｊｉ（ＰｈｏｔｏｎｉｃＴｅｃｈｎｏｌｏｇｙＬａｂｏｒａｔｏｒｙ，Ｉ... 详细信息

Ｗａｖｅｌｅｎｇｔｈ－Ｆｌａｔｔｅｎｅｄ１×３Ｓｉｎｇｌｅ－ＭｏｄｅＦｉｂｒｅ－ＯｐｔｉｃａｌＳｐｌｉｔｔｅｒｓ￥ＨＵＡＮＧＹｏｎｇ；ＺＥＮＧＱｉｎｇｊｉ（ＰｈｏｔｏｎｉｃＴｅｃｈｎｏｌｏｇｙＬａｂｏｒａｔｏｒｙ，ＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃａｌ...

关键词： wavelength-flattened 1 × 3 splitter optical fiber coupling

Internal Optical Parametric Oscillator with SBS Phase Conjugate Resonator

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Chinese Journal of Lasers 1999年第4期8卷 3-5页

作者： JU Youlun LIU Qiang YAO Baoquan YU Xin DU Xiaojun WANG Qi (National Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China) received March, 19, 1999 revised manuscript received may.10, 1999 哈尔滨工业大学可调谐（气体）激光技术国防科技重点实验室黑龙江哈尔滨

It is reported a novel optical parametric oscillator with KTP as medium crystal inside a Nd∶YAG phase conjugate resonator. In the phase conjugate resonator, the laser beam quality is promoted by phase conjugate mirror, which is realized by stimulated Brillouin scattering effect, and Q switch is generated simultaneously. With this device, the laser output at 1.57 μm with 15 mJ energy and 8 ns pulse width is obtained.

关键词： internal optical parametric oscillateor SBS phase conzugate resonator

Signal Demultiplexing from an 8 .2 ×2.5 Gbs OTDM Data Stream Using NOLM:Demonstration and Bit Error Rate Measurement

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Chinese Journal of Lasers 1999年第4期8卷 3-5页

作者： YAO Minyu ZHANG Jianfeng WU Jian CHEN Minghua WANG Dapeng LOU Caiyun GAO Yizhi ZHOU Bingkun (Department of Electronic Engineering, Tsinghua University, Beijing 100084, China) received Sep. 24, 1998 revised manuscript received Jan. 22, 1999 清华大学电子工程系北京 100084 清华大学电子工程系北京

It is presented the experiment of all optical demultiplexing of one 2.5 Gb/s channel from an 8×2.5 Gb/s OTDM data stream using nonlinear optical loop morror with 3 km dispersion shifted fiber. Bit error rate (BER) of the demultiplexed channel is measured. A BER of 10 -11 is achieved and the power penalty is only 1.4 dB when BER is 10 -9 .

关键词： optical time division multiplexing demultiplexing nonlinear optical loop mirror bit error rate