In this paper a kind of interferometric optical fiber gyroscopes based on mach - zehnder interferometric principle is proposed . the signals of this novel optical fiber gyroscope transmit along the positive direction , which avoid the interferometric noise , causing by the negative - directional scattering light and reflecting light , and the kerr effect noise . in this novel optical fiber gyroscope the light power ' s utilization efficiency is high , the output signal is strong 本文提出一种基于mz干涉原理的干涉式光纤陀螺，该种光纤陀螺的光信号采用正向传输，避免了后向传输光对光源的影响，也避免后向散射、反射光带来的相干噪声以及光学kerr效应噪声，光功率利用率高，输出光信号大。
In order to design wavelength insensitive power splitter based on soi , the wavelength characteristic of mach - zehnder interferometer were investigated by means of bpm and fdm ( finite - difference method ) . then the parameters of mach - zehnder interferometer were optimum designed using genetic algorithm . besides , genetic algorithm is also used to optimize the upper tier parameters of mzi based silica - on - silicon to attain a flat spectral response 为了设计对波长不敏感的soi材料的mz功分器，利用束传播法( bpm )和有限差分模式解方法( fdm )对mach - zehnder结构的组成部分定向耦合器和相位延迟部分做了波长相关特性的计算，然后通过遗传算法优化设计了mach - zehnder的结构参数。
There are four types of fgc : fgc based on mach - zehnder interferometer , asymmetric fgc based on 100 % coupler , asymmetric fgc based on mismatched coupler and symmetrical fgc based on 100 % coupler . in this paper , symmetrical fgc based on 100 % coupler and fgc based on mach - zehnder interferometer are analyzed Fgc主要可以分为四类:基于mach - zehnder干涉仪结构的分离型fgc 、基于100 %耦合器的非对称型fgc 、基于0耦合器的非对称型fgc和基于100 %耦合器的对称型fgc 。
Secondly , we propose and demonstrate experimentally a novel multi - wavelength erbium - doped fiber ring laser by using a mach - zehnder fiber interferometer and composite cavity . as a result , simultaneous multi - wavelength oscillations with narrow linewidth and equal wavelength span are obtained in room temperature . this device has advantageous of simple design fabrication and low cost et al 进一步，我们设计了一种新颖的多波长掺铒光纤环形激光器，这种激光器是利用mach - zenhder ( m - z )光纤型干涉仪作为梳状滤波器，并且与复合腔共同选频，获得了窄线宽、等间隔的多波长同时输出，这种激光器具有在常温工作，结构简单，成本低等优点。
Simulations shows that the wavelength dependence and polarization dependence are respectively 2db and 0 . 2db . apart from these , the mach - zehnder type voa was analyzed too . the author deduced directly the relation between attenuation and power consumption , which corrects the faults in literature , utilizing the relation between attenuation and temperature rise and the already presented temperature distribution 本文还分析了基于mach一zehnder千涉仪的热光voa ，根据衰减与温度升高的关系，再利用己经计算出的温度场分布公式，可以直接计算相应功耗下的器件衰减，指出了文献中用电极温升计算衰减的错误。
In view of the potential of mzi ( mach - zehnder interferometer ) sensing structures , useful features of arrow ( antiresonant reflecting optical waveguide ) and promising future applications of refractometers , mzi refractometers based on polymeric arrow structure are studied in this thesis 基于mzi ( mach - zehnderinterferometer )传感结构的巨大发展潜力， arrow ( antiresonantreflectingopticalwaveguide )波导的突出优点以及折射仪应用的广阔前景，本文对聚合物arrow结构的mzi折射率测量芯片进行了研究。
The demodulation method of fiber grating is the key method of fiber grating sensor . the main demodulation method includes : grating matching method , tunable fabry - perot cavity method , non - balance mach - zehnder interferometer method and tunable narrow - band light source method . the tunable fabry - perot cavity method is discussed in detail , and a demodulation system based on dsp is put forward 光纤光栅的解调技术是光纤光栅传感器的关键技术，本文讨论了光纤光栅的波长解调方法，包括匹配光栅法、可调谐f - p腔法、非平衡mach - zehnder干涉仪法和可调谐光源法等，详细分析了可调谐f - p滤波器的特性和解调原理提出了一种基于dsp的解调光纤光栅波长的可调谐法布里一珀罗腔解调方案。
The wavelength dependence of the directional couplers is modeled and with this model optimal designs of planar wavelength circuits based on mach - zehnder interferometers and their cascaded forms are presented . liquid crystals are widely used in optical information processing technologies . optical devices based on liquid crystals , such as variable optical attenuators ( voas ) , switches and tunable filters , have been introduced into the area of optical communications recently 在基于级联mach - zehnder干涉仪的宽带器件设计中，本论文建立了定向耦合器波长敏感性的近似模型，并在此基础上提出了通过对初始结构(即不考虑定向耦合器波长敏感性的设计结果)做微扰来确定宽带器件结构参数的设计方法。
