马赫-曾德尔干涉仪对大气后向散射的谱分析

论证了马赫-曾德尔干涉仪对532 nm/354.7 nm大气后向散射的频谱分析性能。马赫-曾德尔干涉仪接收激光大气后向散射回波,通过测量双臂光路、正交偏振、四通道结构形成的干涉相位差和干涉对比度,计算大气的多普勒频移,以及大气气溶胶后向散射与气体分子后向散射的比值;发射脉冲激光器及其倍频器可以直接工作在多纵模状态下,大气的后向散射的频谱分析器可以不必与发射光中心频率锁定;给出同时探测大气的后向散射比分布廓线及大气风速的分析方法。马赫-曾德尔干涉仪作为大气后向散射的频谱分析器,若应用于高光谱分辨率激光雷达中,将成为一个性能优秀、前景广阔的大气分析装置。     

基于电光马赫-曾德尔干涉仪的飞秒光梳载波包络相移快速调节技术

介绍了一种基于电光晶体马赫-曾德尔干涉仪的载波包络相移快速调节方法,对此方法进行了理论分析和仿真计算,并搭建了一套基于电光晶体马赫-曾德尔干涉仪的载波包络相移调节的光梳实验系统.与超稳激光进行拍频以验证其调节效果,证明可实现8 MHz的载波包络相移调节范围,为窄光梳的实现提供了一种技术手段.     

用于光纤无线通讯的微环相位辅助型马赫-曾德尔调制器

本文主要对微环相位辅助型马赫-曾德尔调制器进行了分析,结果显示,在损耗不计的条件下,器件的非线性基本出自于传输函数泰勒展式的三次项,经由对投射系数的控制,能够让该项为零,而无毛刺动态范围也会因此得到19.68dB的提高。在存在损耗的条件下,经由对投射系数与偏压因子的控制,能够同时将二次与三次非线性项都抑制掉,而无毛刺动态将会得到15.74dB的改善。     

马赫-曾德尔调制器有限消光比对光生毫米波的影响

光生毫米波在光纤无线电,毫米波成像,射电天文学等领域都有广泛的应用前景。本文对基于单极型马赫-曾德尔调制器(MZM)采用双边带光载波抑制调制的光生毫米波方法进行了理论分析。详细分析了马赫-曾德尔调制器的有限消光比对产生的毫米波的影响。建立了基于单极型马赫-曾德尔调制器采用双边带调制光载波抑制的光生毫米波的实验平台。输入驱动信号频率在23到30GHz之间调节时,获得46到60GHz之间连续可调的毫米波信号,其功率抖动小于1.5dB。     

马赫-曾德尔光纤干涉仪的研制及应用

介绍了作者在测量单纵模激光器线宽参数的过程中,研制的马赫-曾德尔光纤干涉仪,并给出了实验结果.     

M-Z干涉仪调Q的光谱研究

光纤M-Z干涉仪是由两个3dB耦合器构成,将此干涉仪放到激光腔中通过调节其干涉状态就可以相应地调制激光腔的损耗,发挥Q开关的作用。从理论上模拟了M-Z干涉仪输出光强随相位差的改变而发生平移,并在实验中验证了这一特性,证明理论模拟的特性与实验基本符合。     

用于微位移测量的迈克尔逊激光干涉仪综述

迈克尔逊干涉术测量微位移可实现纳米甚至更高的分辨力,并且具备能直接溯源至激光波长等诸多优点,是目前微位移测量的重要技术手段.以限制迈克尔逊干涉仪品质提高的非线性误差为主要切入点,对目前各种基于迈克尔逊干涉原理的激光干涉技术进行了分类介绍,主要讨论了微位移测量中实现高精度和高分辨率的干涉测量技术,最后展望了激光干涉法测量...     

单频激光干涉仪条纹的偏振移相细分技术

提出了一种用于单频激光干涉仪条纹细分的偏振移相技术.通过偏振分光镜、波片等光学元器件产生四路依次相差90°相位的激光干涉信号,经过硬件电路的整形、放大和比较后,可以解决常见的光强"零漂"问题.共光路设计有效地消除了由于环境因素给测量带来的误差,提高了干涉系统的稳定性和重复性.移相技术不仅充分地利用光能量,而且四路信号更便于干涉条纹的计数和判向,同时为电子细分技术奠定了基础.     

Simulation of the initial tuning of a Mach-Zehnder interferometer

A phase difference equation is obtained describing the interference pattern of the initial tuning of a Mach-Zehnder interferometer on the basis of simulating the mutual orientation of wave fronts. The effect of parameters on this tuning is analyzed. A procedure is suggested for computing interferograms for any initial tuning. __________ Translated from Izmeritel’naya Tekhnika, No. 9, pp. 30–33, September, 2006.     

Polarization phase shifting cyclic interferometer for surface profilometry of non-birefringent phase samples

A rectangular path cyclic interferometer has the unique property that the counter-propagating wavefronts travelling in the interferometer arms are folded with respect to each other in the plane of the interferometer although the two wavefronts finally emerge from the interferometer unfolded. A phase disturbance introduced in one lateral half of the interferometer arm is therefore manifested in complementary lateral halves of the observed interference pattern. This phenomenon is utilized to evaluate the surface profile of a reflecting sample placed on one of the interferometer mirrors. The sample phase is retrieved using polarization phase shifting. Experimental results showing three-dimensional surface morphology of a small scale integrated circuitry directly etched on silicon are presented.     

A heterodyne laser interferometer with digital phase conversion

The structure and metrological properties have been determined for processing with digital logic applicable to a wide range of heterodyne laser interference systems employing digital phase monitoring in the submicrometer and nanometer resolving power ranges. __________ Translated from Izmeritel’naya Tekhnika, No. 6, pp. 13–18, June, 2006.     

The Real-Time Mach-Zehnder Interferometer used in Space Experiment

The optical interference method is a promising technique for measuring temperature, density, and concentration in fluids. The non-intrusive and non-invasive nature of its optical techniques to the measured section are its most outstanding features. However, the adverse experiment environment, especially regarding shaking and vibrating, greatly restricts the application of the interferometer. In the present work, an optical diagnostic system consisting of a Mach-Zehnder interferometer (named after physicists Ludwig Mach) and an image processor has been developed that increases the measuring sensitivity compared to conventional experimental methods in fluid mechanics. An image processor has also been developed for obtaining quantitative results by using Fourier transformation. The present facility has been used in observing and measuring the mass transfer process of a water droplet in EAFP protein solution under microgravity condition provided by the satellite Shi Jian No. 8.     

Measurement of small vibration by laser interferometer

The method and experimental results of measuring a small vibrating displacement by laser interferometer are introduced in this paper. The dynamic response of a new kind of tiny piezoelectric driver is detected. Results show that this kind of PZN-PZT tiny driver not only has high voltage-displacement sensitivity, but also its frequency response approaches to 1 kHz.Therefore this kind of piezoelectric driver can be used widely in many fields.     

激光干涉法测量微小振动

文章介绍用激光干涉法测量新型压电微驱动器动态位移响应的实验原理及方法。实验结果表明,这类PZN－PZT微驱动器不仅具有高的电压－位移灵敏度,而且其频响可高达1kHz,是一种很好的微驱动器件。     

Metrological characteristics of the Baksan laser interferometer

The metrological characteristics as well as an evaluation of the limiting sensitivity of the Baksan laser interferometer — strain meter with measuring arm length of 75 m, intended for recording and investigating lithospheric deformations over a broad range of frequencies, are presented. Long-term regime observations of deformation in four frequency channels show that the technical constraints that govern the sensitivity of the device lie below the observable deformations over the entire working range of frequencies. __________ Translated from Izmeritel’naya Tekhnika, No. 12, pp. 26–30, December, 2005.     

Combined Twyman-Green and Mach-Zehnder interferometer for microlens testing

A new interferometer design for microlens testing is presented. The phase-shifting system combines the advantages of a Twyman-Green and a Mach-Zehnder interferometer and permits full characterization of the aberrations of microlenses as well as radius of curvature and focal length measurements. The Twyman-Green system is applied to surface testing in reflection (single reflection), whereas the Mach-Zehnder system is used for lens testing in transmission (single pass). Both measurements are performed without removal of the test part, allowing for combination of the results without confusion of the actual lens and without an azimuthal orientation error. The interferometer setup is explained, the test procedure is described, and experimental results are given.