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By utilizing the cross gain modulation effect and the period 1 oscillation harmonic frequency locked in an optically injected semiconductor laser , we can extract the wavelength conversional individual channel optical clock from the optical time division multiplexing OTDM signal .

光注入半导体激光器会产生非线性单周期振荡特性，利用交叉增益调制效应及对单周期振荡的微波锁频效应，可从光时分复用信号中提取出波长转换的分路光时钟。

The generated optical millimeter-wave signals have very high quality with an optical carrier and harmonic distortion suppression ratio of more than 38 and 36 dB at 40 and 72 GHz, respectively.

产生很纯的微波光讯号，40 GHz 和 72 GHz抑制载波讯号高达38 和 36 dB 。

In this thesis, simulation tools and experiments were carried out to prove that non-metal optical head works as metal optical head previously reported.

论文中以模拟及实验，证明非金属光学头的可行性。

Optical Transport Network based on wavelength division multiplexing and optical switching is playing an important role in modern transporting network. The advantage of capacity and transparency makes it can transport large heteromorphic service demands simultaneously, which will simplify the architecture of transporting network.

基于波分复用传输和光交换的光传送网络在传输网络中的地位和作用变得越来越重要，高容量和透明特征使得它能够同时传输多种异构网络业务，极大地简化了传输网络的体系结构。

This paper deals with modulation formats for high-speed optical transmission and crosstalk in WDM optical networks, and the main research work and results are listed as follows.

本论文主要研究的是高速光传输中的新型调制格式和WDM光网络中的串扰，主要的研究内容及成果如下： 1。

The diffractive optical elements,also called holographical optical elements, are ones based on the theroy of diffraction and non_traditional elements.

衍射光学元件又称为全息光学元件，是建立在衍射原理上的一种非传统光学元件。

The successfully fabricated of the ir holographical optical element with curved and high average spatial frequency fringe pattern provide a new path for the optical system design on the precision measurment.

具有一定曲率和高空间频率的近红外全息光学元件的研制成功，为精密测试技术中的光学系统设计开辟了一个新的途径。

The distributed optical fiber sensing technology is the hot off the press in the optical fiber sensing field in recent years.

分布式光纤传感技术是近年来光纤传感领域的研究热点。

In this project, the properties of hydrogel were investigated by optical techniques, and the applications of hydrogel in optical devices and systems were explored.

中文摘要：本项目研究用光学手段研究智能凝胶的特性，并研究智能凝胶在光学器件及系统中的应用。

Optical orthogonal codes; Optical code division multiple access; Prime sequences ; Hyperbolic line congruence code

光码分多址；二维光正交码；素数码；双曲线性同余码

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。