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Chinese Optics Letters 第7卷 第1期

Author Affiliations
Abstract
School of Physics and Electronic Information, Wenzhou University, Wenzhou 325035
The autocorrelation function of electronic wave packet of hydrogen atom in a strong electric field below the zero-field ionization threshold is investigated in the formalism of semiclassical theory. It is found that the autocorrelation depends on the applied laser pulse significantly. In the case of narrow laser pulse, the reviving peaks in the autocorrelation can be attributed to the closed orbits of electrons, which are related to the classical dynamics of the system. But this correspondence is wiped out with increasing the laser width because of the interference among the adjacent reviving peaks.
强场激光物理 可调激光 干涉 020.2649 Strong field laser physics 140.3600 Lasers, tunable 260.3160 Interference 
Chinese Optics Letters
2009, 7(1): 0101
Author Affiliations
Abstract
Department of Physics, Anhui Normal University, Wuhu 241000
A new theoretical method with generality is proposed to study the statistical properties of the speckle phase. The general expression of the standard deviation of the speckle phase about the first-order statistics is derived according to the relation between the phase and the complex speckle amplitude. The statistical properties of the speckle phase have been studied in the diffraction fields with this new theoretical method.
散斑 相位统计性质 030.6140 Speckle 000.5490 Probability theory, stochastic processes, and statistics 
Chinese Optics Letters
2009, 7(1): 0105
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 Graduate University of Chinese Academy of Sciences, Beijing 100049
In this letter, a guided-mode resonance (GMR) filter with the same material for both the grating layer and the waveguide layer is designed, and its optical properties are investigated. The GMR filter owns almost 100% reflection at the resonance wavelength of 800 nm with the full-width at half-maximum (FWHM) of 20 nm, and its sideband reflection from 700 to 1000 nm is less than 5%. As the resonance wavelength is influenced by more than one parameter during the fabrication process, GMR filter with the same resonance wavelength can be obtained by adjusting other parameters or even one parameter to deviate from the design value.
导模共振 光学薄膜 光栅 050.1950 Diffraction gratings 310.2790 Guided waves 310.6860 Thin films, optical properties 
Chinese Optics Letters
2009, 7(1): 0109
Author Affiliations
Abstract
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 2002402 Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), Electrum 229, 16440, Sweden
We experimentally demonstrate 10-Gb/s format conversion from non-return-to-zero (NRZ) to alternate-mark-inversion (AMI) using the linear filtering effect of silicon microring resonator. Our discussion and analysis in simulation further show that a 10-Gb/s AMI signal with good quality can be obtained by a resonator with a notch depth larger than 25 dB when the 3-dB bandwidth is 0.4 nm.
全光器件 耦合谐振腔 060.0060 Fiber optics and optical communications 230.1150 All-optical devices 230.4555 Coupled resonators 
Chinese Optics Letters
2009, 7(1): 0112
Author Affiliations
Abstract
School of Computer and Communication, Hunan University, Changsha 410082
We propose a novel transmitter and receiver for differential quadrature phase-shift keying (DQPSK) format. The impact of the first-order polarization mode dispersion (PMD) on systems using DQPSK with 100-Gb/s non-return-to-zero (NRZ) or return-to-zero (RZ) format is investigated. Through computing the eye openings of DQPSK formats under different PMD conditions, it is found that NRZ DQPSK, as compared with RZ DQPSK, incurs smaller eye opening due to PMD. Carrier-suppressed return-to-zero (CSRZ) DQPSK format has better tolerance than RZ DQPSK format to PMD for a given bit rate.
光纤通信 差分正交相移键控 偏振模色散 060.4510 Optical communications 060.4080 Modulation 060.2420 Fibers, polarization-maintaining 
Chinese Optics Letters
2009, 7(1): 0115
Author Affiliations
Abstract
Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001
With the development of optical space communications, a global space-based optical backbone network is currently proposed by using broadband laser inter-satellite links (ISLs) which enable routing traffic through the space. Satellite optical networking techniques based on wavelength division multiplexing (WDM) ISLs can transit significantly high data rates signals. In this letter, a new function of wavelength excursion due to Doppler-effect is developed for the ISLs, considering the conception of pointing ahead mechanism. The characteristic of wavelength excursion induced by Doppler-effect is examined in one of low earth orbit (LEO) satellite constellation networks named the next-generation LEO system (NeLS) with WDM ISLs assumed, and the influence on its communications caused by wavelength excursion is analyzed.
多普勒效应 卫星通信网络 波分复用 NeLS 060.4510 Optical communications 060.4250 Networks 060.4230 Multiplexing 
Chinese Optics Letters
2009, 7(1): 0119
Author Affiliations
Abstract
School of Mechanical and Electronical Engineering, Harbin Institute of Technology, Harbin 150001
In order to increase the multiplexing density of the fiber Bragg gratings (FBGs) for a low cost per-sensor, based on the analysis of the spectrum shadow distortion (SSD), a novel successive demultiplexing scheme for FBG sensors has been developed. It is based on the optical code division multiple access (CDMA) balanced demodulation. A high-density multiplexing-demultiplexing system for FBG sensors has been designed, and corresponding simulation carried out has demonstrated that the FBG sensors’ reflective signals can still be obtained accurately and respectively, even if FBG sensors’ operating bandwidths heavily overlap. The SSD has been greatly mitigated.
FBG传感器 复用 网络 060.2370 Fiber optics sensors 060.4230 Multiplexing 060.4250 Networks 
Chinese Optics Letters
2009, 7(1): 0123
 
Author Affiliations
Abstract
The method of generating equal-amplitude spectral lines by multi-frequency phase modulation is used in stimulated Brillouin scattering (SBS) suppression. The spectra of three, five, seven, and eleven equal-amplitude spectral lines are obtained in experiment with flatnesses less than 0.3 dB. Theoretical research on SBS suppression shows that the threshold power after modulation is in reverse proportion to the maximum square of amplitude moduli of fundamental frequency and the nth harmonic wave. The threshold powers of three, five, seven, and eleven equal-amplitude spectral lines are improved by 5.21, 8.36, 9.39, and 10.76 dB, respectively.
光纤通信系统 多频相位调制 等幅光谱线 受激布里渊散射 抑制 060.2330 Fiber optics communications 060.3510 Lasers, fiber 140.0140 Lasers and laser optics 
Chinese Optics Letters
2009, 7(1): 0129
Author Affiliations
Abstract
Faculty of Mechanical and Electronic Engineering, Southwest Petroleum University, Key Laboratory of Petroleum-Gas Equipment, Ministry of Education of China, Chengdu 610500
A novel three-component hybrid-integrated optical accelerometer based on LiNbO3 photoelastic waveguide is presented. The photoelasitcity of LiNbO3 due to three-dimensional stress states is obtained analytically. We analyze the level of sensitivity to cross-axis accelerations which is a very important parameter for three-component accelerometer. Theoretically, the designed three-component hybrid-integrated optical accelerometer has a transverse sensitivity ratio (TSR) of zero. The sensor has a high natural frequency of 3.5 kHz and a linear broad working frequency.
三分量加速度传感器 光弹效应 横向灵敏度比 LiNbO3波导 130.6010 Sensors 280.4788 Optical sensing and sensors 
Chinese Optics Letters
2009, 7(1): 0132
Author Affiliations
Abstract
School of Electronics Engineering and Computer Science, Peking University, Beijing 100871
An optical frequency comb phase-locked on an iodine frequency stabilized diode laser at 634 nm is constructed to transfer the accuracy and stability from the optical domain to the radio frequency domain. An external-cavity diode laser is frequency-stabilized on the Doppler-free absorption signals of the hyperfine transition R(80)8-4 using the third-harmonic detection technique. The instability of the ultra-stable optical oscillator is determined to be 7\times10^{-12} by a cesium atomic clock via the optical frequency comb’s mass frequency dividing technique.
120.0120 Instrumentation, measurement, and metrology 300.0300 Spectroscopy 
Chinese Optics Letters
2009, 7(1): 0136
Author Affiliations
Abstract
College of Optic-Electric Science and Engineering, National University of Defense Technology, Changsha 410073
Limited by the precision of optical machining and assembling, the optical axes of lasers in an array cannot be strictly parallel to each other, which will result in the beam quality degradation of the combined beam. The tolerance on tilt error for coherent combining of fiber lasers is studied in detail. The complex amplitude distribution in the far field for the Gaussian beam with tilt angle is obtained by a novel coordinate transform method. Effect of tilt error on coherent combining is modelled analytically. Beam propagation factor is used to evaluate the effect of coherent combining. Numerical results show that for ring-distributed fiber laser array with central wavelength \lambda and geometry size D, if the root-mean-square (RMS) value of the tilt error is smaller than 0.72\lambda/D, the energy encircled in the diffraction-limited bucket can be ensured to be more than 50% of the value when there is no tilt error. The results are helpful to the designing and manufacturing of fiber array for coherent combining.
相干合成 光纤激光阵列 倾斜误差 坐标变换 光束传输因子 140.3510 Lasers, fiber 140.3290 Laser arrays 060.2320 Fiber optics amplifiers and oscillators 
Chinese Optics Letters
2009, 7(1): 0139
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 Graduate University of Chinese Academy of Science, Beijing 100049
A compact, all-solid-state, narrow-linewidth, pulsed 455-nm blue laser based on Ti:sapphire crystal is developed. Pumped by a 10-Hz, frequency-doubled all-solid-state Nd:YAG laser and injection-seeded by an external cavity laser diode, the narrow-linewidth 910-nm laser with pulse width of 20 ns is obtained from a Ti:sapphire laser. 3.43-mJ blue laser can be obtained from the laser system by frequency-doubling with BBO crystal. This research is very useful to determine the roadmap of developing the practical, high power blue laser. This kind of laser will have potential application for underwater communication.
全固态激光器 蓝光 单模 倍频 140.0140 Lasers and laser optics 140.3410 Laser resonators 140.3570 Lasers, single-mode 140.3590 Lasers, titanium 
Chinese Optics Letters
2009, 7(1): 0143
Author Affiliations
Abstract
Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871
We present a novel design of a compact, stable, and easy-adjustable semiconductor optical amplifier (SOA) system. This SOA system is capable of providing up to 560-mW laser power at the wavelength of 852 nm. For the continuous-wave (CW) seeding laser, the amplification gain can reach 18 dB. We add amplitude modulation onto the CW laser and measure the modulation amplification between seeding and output laser. The amplification gain remains constant within the frequency range from 10 Hz to 1 MHz. The whole system could work in ultra-stable condition: for CW seeding laser, the fluctuation of output power is less than 0.33% in several hours.
半导体光放大器 新结构 高功率输出 幅度调制 超稳定工作 140.4480 Optical amplifiers 140.2020 Diode lasers 140.3325 Laser coupling 
Chinese Optics Letters
2009, 7(1): 0146
Author Affiliations
Abstract
School of Automotive Engineering, Wuhan University of Technology, Wuhan 4300702 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Both the nature of avalanche ionization (AI) and the role of multi-photon ionization (MPI) in the studies of laser-induced damage have remained controversial up to now. According to the model proposed by Stuart et al., we study the role of MPI and AI in laser-induced damage in two dielectric films, fused silica (FS) and barium aluminum borosilicate (BBS), irradiated by 780-nm laser pulse with the pulse width range of 0.01-5 ps. The effects of MPI and initial electron density on seed electron generation are numerically analyzed. For FS, laser-induced damage is dominated by AI for the entire pulse width regime due to the wider band-gap. While for BBS, MPI becomes the leading power in damage for the pulse width \tau less than about 0.03 ps. MPI may result in a sharp rise of threshold fluence Fth on \tau, and AI may lead to a mild increase or even a constant value of Fth on \tau. MPI serves the production of seed electrons for AI when the electron density for AI is approached or exceeded before the end of MPI. This also means that the effect of initial electron can be neglected when MPI dominates the seed electron generation. The threshold fluence Fth decreases with the increasing initial electron density when the latter exceeds a certain critical value.
激光诱导损伤 多光子离化 雪崩离化 初始电子密度 损伤阈值 140.3440 Laser-induced breakdown 140.3330 Laser damage 350.1820 Damage 
Chinese Optics Letters
2009, 7(1): 0149
   
Author Affiliations
Abstract
Evolution of surface morphology and optical characteristics of 1.3-\mum In0.5Ga0.5As/GaAs quantum dots (QDs) grown by molecular beam epitaxy (MBE) are investigated by atomic force microscopy (AFM) and photoluminescence (PL). After deposition of 16 monolayers (ML) of In0.5Ga0.5As, QDs are formed and elongated along the [110] direction when using sub-ML depositions, while large size InGaAs QDs with better uniformity are formed when using ML or super-ML depositions. It is also found that the larger size QDs show enhanced PL efficiency without optical nonlinearity, which is in contrast to the elongated QDs.
量子点 分子束外延 光荧光 160.6000 Semiconductor materials 250.5230 Photoluminescence 310.1860 Deposition and fabrication 
Chinese Optics Letters
2009, 7(1): 0152
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 Physical Chemistry of Luminescent Materials, University of Lyon, UMR CNRS 5620, Villeurbanne 69622, France
Yb-Er codoped Na2O-Al2O3-P2O5-xSiO2 glasses containing 0-20 mol% SiO2 were prepared successfully. The addition of SiO2 to the phosphate glass not only lengthens the bond between P^{5+} and non-bridging oxygen but also reduces the number of P=O bond. In contrast with silicate glass in which there is only four-fold coordinated Si^{4+}, most probably there coexist [SiO4 tetrahedron and [SiO6] octahedron in our glasses. Within the range of 0-20 mol% SiO2 addition, the stimulated emission cross-section of Er^{3+} ion only decreases no more than 10%. The Judd-Ofelt intensity parameters of Er^{3+}, \Omega_{2} does not change greatly, but \Omega_{4} and \Omega_{6} decrease obviously with increasing SiO2 addition, because the bond between Er^{3+} and O^{2-} is more strongly covalently bonded.
镱铒共掺磷酸盐玻璃 氧化硅 拉曼光谱 Judd-Ofelt参数 160.2750 Glass and other amorphous materials 160.5690 Rare-earth-doped materials 300.6450 Spectroscopy, Raman 300.6170 Spectra 
Chinese Optics Letters
2009, 7(1): 0156
Author Affiliations
Abstract
State Key Laboratory of Precision Spectroscopy (East China Normal University), Department of Physics, and Department of Biology, East China Normal University, Shanghai 200062
Raman spectroscopy has strong potential for providing non-invasion diagnosis of cancers. In this paper, micro-Raman spectroscopy is used to diagnose one most common liver cancer, hepatocellular carcinoma (HCC). The statistical analyzes, including t-test, principal component analysis (PCA), and linear discriminant analysis (LDA), are performed on the Raman spectra of malignant and normal hepatocytes. The t-test-LDA results show that the 786- and 1004-cm^{-1} bands of the malignant and normal hepatocytes are significantly different, and PCA-LDA results show an overall accuracy of 100% for the Raman spectroscopic identification of normal and malignant hepatocytes in our experiment.
拉曼光谱 肝细胞癌 t-检验 主成分分析 线性判别分析 300.6450 Spectroscopy, Raman 170.5660 Raman spectroscopy 170.1530 Cell analysis 
Chinese Optics Letters
2009, 7(1): 0160
Author Affiliations
Abstract
Key Laboratory of Opto-Electronic Science and Technology for Medicine Fujian Normal University, Ministry of Education, Fujian Provincial Key Lab of Photonic Technology, Fuzhou 350007
Monte Carlo algorithm and Stokes-Mueller formalism are used to simulate the propagation behavior of polarized light in turbid media. The influence of single scattering and multiple scattering on backscattered Mueller matrix in turbid media is discussed. Single and double scattering photons form the major part of backscattered polarization patterns, while multiple scattering photons present more likely as background. Further quantitative analyses show that single scattering approximation and double scattering approximation are quite accurate when discussing the polarization patterns near the incident point.
光子传输 偏振 后向散射 散射介质 170.5280 Photon migration 260.5430 Polarization 290.1350 Backscattering 290.7050 Turbid media 
Chinese Optics Letters
2009, 7(1): 0164
Author Affiliations
Abstract
The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education of China, Nankai University, Tianjin 3004572 Photonics Center, College of Physics Science, Nankai University, Tianjin 3000713 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900
2 Nonvolatile two-color holographic recording gated by incoherent ultraviolet (UV) light centered at 365 nm is investigated in near-stoichiometric lithium niobate crystals. The influence of thermal treatment on the two-color recording is studied. The results show that thermal reduction tends to improve the two-color recording performance, whereas thermal oxidation degrades the two-color recording. With an incoherent 0.2-W/cm2 UV gating light and a 0.25-W/cm2 semiconductor recording laser at 780 nm, a two-color recording sensitivity of 4\times10^{-3} cm/J and a recording dynamic range characterized by M/# of 0.12 are achieved in a 2.2-mm thermally reduced near-stoichiometric lithium niobate crystal. We attribute the improvement to the prolonged lifetime of small polarons and the increased absorption at the gating wavelength due to thermal reduction.
铌酸锂 热处理 全息存储 非挥发 210.2860 Holographic and volume memories 090.2900 Optical storage materials 160.2900 Optical storage materials 160.5320 Photorefractive materials 
Chinese Optics Letters
2009, 7(1): 0167
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Author Affiliations
Abstract
Interferometric optical testing using computer-generated hologram (CGH) can give highly accurate measurement of aspheric surfaces has been proved. After the system is designed, a phase function is obtained according to the CGH’s surface plane. For the requirement of accuracy, an optimization algorithm that transfers the phase function into a certain mask pattern file is presented in this letter, based on the relationship between the pattern error of CGH and the output wavefront accuracy. Then the writing machine is able to fabricate such a mask with this kind of file. With that mask, an improved procedure on fabrication of phase type CGH is also presented. Interferometric test results of an aspheric surface show that the whole test system obtains the demanded accuracy.
非球面 计算全息术 光学检测 220.1250 Aspherics 050.1970 Diffractive optics 090.1760 Computer holography 220.3620 Lens system design 
Chinese Optics Letters
2009, 7(1): 0170
Author Affiliations
Abstract
Optical Storage Laboratory, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 School of Information Science and Technology, East China Normal University, Shanghai 200241
Field enhancement effect of metal probe in evanescent field, induced by using a multi-layers structure for exciting surface plasmon resonance (SPR), is analyzed numerically by utilizing two-dimensional (2D) TM-wave finite difference time-domain (FDTD) method. In this letter, we used a fundamental mode Gaussian beam to induce evanescent field, and calculated the electric intensity. The results show that compared with the nonmetal probe, the metal probe has a larger field enhancement effect, and its scattering wave induced by field enhancement has a bigger decay coefficient. The field enhancement effect should conclude that the metal probe has an important application in nanolithography.
260.3910 Metal optics 240.6680 Surface plasmons 000.4430 Numerical approximation and analysis 
Chinese Optics Letters
2009, 7(1): 0174
Author Affiliations
Abstract
College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 3300222 Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 3300223 Department of Physics, Anqing Teachers College, Anqing 246011
In the Born-Markov approximation and two-level approximation, and using the Bloch-Redfield equation, the decoherence property of superconducting quantum circuit with a flux qubit is investigated. The influence on decoherence of the mutual inductance coupling between the circuit components is complicated. The mutual inductance coupling between different loops will decrease the decoherence time. However, the mutual inductance coupling of the same loop, in a certain interval, will increase the decoherence time. Therefore, we can control the decoherence time by changing the mutual inductance parameters such as the strength and direction of coupling.
磁通量子比特 消相干 玻恩-马尔科夫近似 270.0270 Quantum optics 000.6800 Theoretical physics 
Chinese Optics Letters
2009, 7(1): 0178
Author Affiliations
Abstract
Shandong Vocational and Trade College, Jining 2720172 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
We propose a new repeat-until-success (RUS) measurement-based scheme to implement quantum controlled phase gates according to the effect of dipole-induced-transparency (DIT) in a cavity and single-photon interference at a 50:50 beam-splitter. In our scheme, the DIT effect can appropriately attach a photon to the state of the dipoles according to their initial state, and in this way, a suitably encoded dipole-photon state is thus prepared. The measurement of the photon after it passing through a 50:50 beam-splitter can project the encoded matter-photon state to either a desired phase gate operation for the matter qubits or to their initial states. The recurrence of the initial state permits us to implement the desired entangling gate in a RUS way.
偶极子诱导透明现象 光子分束器单光子干涉 受控相位门 270.5585 Quantum information and processing 230.1360 Beam splitters 040.5160 Photodetectors 
Chinese Optics Letters
2009, 7(1): 0182
Author Affiliations
Abstract
Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
Three-dimensional (3D) excitation-emission matrix (EEM) fluorescence spectroscopy is applied to characterize the coal oil. The results show that the 3D fluorescence spectra of coal oil in aqueous solution mainly have one broad peak. This peak is identified at the excitation/emission wavelengths of 270/290 nm. The relation between the fluorescence intensity and the concentration of coal oil is also studied. When the concentration lies between 2-2000 ppm, the relation between the fluorescence intensity and the concentration of coal oil is well linear. The nature of solvents significantly affects the EEM fluorescence of coal oil.
煤油 激发-发射矩阵荧光光谱 乙醇-水混合液 300.0300 Spectroscopy 020.0020 Atomic and molecular physics 
Chinese Optics Letters
2009, 7(1): 0185
Author Affiliations
Abstract
Research Center for Space Optical Engineering, Harbin Institute of Technology, Harbin 150001
Two automatic measurement methods of bidirectional reflection distribution function (BRDF) are presented based on absolute and relative definition. Measurement principle and scheme of the methods are analyzed. A real-time measurement device is developed, the measurement spectral range of which is from ultraviolet to near infrared with 2.4-nm wavelength resolution, and the angular range is [EQUATION] in azimuth angle and [EQUATION] in zenith angle with [EQUATION] angle resolution. Absolute measurements of BRDF on tinfoil and ceramic tile are performed and the test materials present apparent specular reflection characteristics. The theoretical error in the experiment is about 6.05%. The BRDF measurement results are closely related to the precision of measurement platform, the sensitivity of measurement instrument, and the stability of illuminating light source.
双向反射分布函数 绝对测量 相对测量 测量原理 测量方案 测量精度 300.6550 Spectroscopy, visible 290.5820 Scattering measurements 120.5700 Reflection 160.4760 Optical properties 
Chinese Optics Letters
2009, 7(1): 0188
Author Affiliations
Abstract
1 The Key Laboratory of Optoelectronic Technology and System, Ministry of Education, Chongqing University, Chongqing 400030
2 Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900
A new high spectral resolution crystal spectrometer is designed to measure very low emissive X-ray spectra of laser-produced plasma in [EQUATION] nm range. A large open aperture ([EQUATION] (mm)) mica (002) spherically bent crystal with curvature radius [EQUATION] mm is used as dispersive and focusing element. The imaging plate is employed to obtain high spectral resolution with effective area of [EQUATION] (mm). The long designed path of the X-ray spectrometer beam is 980 mm from the source to the detector via the crystal. Experiment is carried out at a 20-J laser facility. X-ray spectra in an absolute intensity scale is obtained from Al laser-produced plasmas created by laser energy of 6.78 J. Samples of spectra obtained with spectral resolution of up to [EQUATION] are presented. The results clearly show that the device is good to diagnose laser high-density plasmas.
高分辨谱仪 布拉格反射 等离子体诊断 X射线光学 300.6320 Spectroscopy, high-resolution 230.1480 Bragg reflectors 350.5400 Plasmas 340.0340 X-ray optics 
Chinese Optics Letters
2009, 7(1): 0192
Author Affiliations
Abstract
Key Laboratory of Opto-Electronic Information Acquisition and Manipulation, Ministry of Education, Anhui University, Hefei 230039
A new micro-vibration sensor based on single-mode fiber ring laser is put forward. The Mach-Zehnder interferometric (MZI) detection technique is presented for interrogating laser frequency shift due to the measurand (piezoelectric transducer (PZT) is used to simulate the micro-vibration) induced laser cavity strain from both single- and multi-mode lasers. In the experiment, compared with multi-mode laser sensors, the single-mode laser sensor is proved to be a sensor with high resolution. When the PZT is driven by the analog signal (0.03 rad near 2 kHz), the signal-to-noise ratio (SNR) of output signal from the single-mode laser sensor is close to 55 dB and the sensitivity of the sensor is about 5\times10^{-5} rad/Hz^{1/2}.
光纤环形腔激光器 激光器型传感器 相位载波 马赫-泽德干涉仪 060.2370 Fiber optics sensors 060.2430 Fibers, single-mode 060.5060 Phase modulation 140.3570 Lasers, single-mode 
Chinese Optics Letters
2009, 7(1): 26