光纤

Erbium doped fiber amplifier is studied theoretically and experimentally in this dissertation.

本文从理论上和实验上对掺铒光纤放大器进行了研究。

Experimental study of two stage erbium doped fiber amplifiers pumped by 980 nm and 1480 nm LD.

nm和1480 nm LD混合泵浦两段级联掺铒光纤放大器实验研究。

Theoretically, the tunable range is confined only by erbium doped fiber gain and filter bandwidth.

理论上，调谐范围只受掺铒光纤增益和滤波器带宽的限制。

An important application of LPG is to flatten the spectra of erbium doped superfluorescent fiber source .

长周期光栅的一个重要应用就是用于掺铒光纤超荧光光源的光谱平坦化。

The signal gain characteristics of hybrid pumped erbium doped fiber amplifiers are studied theoretically.

从理论上研究了双频激光混合泵浦掺饵光纤放大器的增益特性。

As the emission spectrum of Erbium ions covers 1550nm, which is the low loss window in fiber optic communication, the study on EDFA and fiber laser is crucial for the development of technology of fiber optical communication.

由于铒离子的发射谱覆盖了1550nm的光纤通信低损耗窗口，因此对掺铒光纤放大器及激光器的研究将对光纤通信技术的发展起着举足轻重的作用。

The analysis shows that it is important to obtain stable self—pulses by changing the photon lifetime of two orthogonal polarization modes in the erbium —doped fiber laser.

结果表明，掺铒光纤激光器中两正交偏振模光子寿命的调节对获得稳定的自脉冲有着十分重要的作用。

However, because of the new high-speed networks based on fiber optics, there may not be a need for any error control at this layer.

然而，随着新的基于光纤的高速网络的出现，在这一层上不必再进行错误控制了。

A high output power narrow linewidth fiber laser based on fiber Bragg grating Fabry-Perot etalon has been accomplished.

进行了高功率线型腔光纤激光器实验研究。

The fiber endface and diaphragm form an etalon cavity. The entire sensor head is only 125μm in diameter.

单模光纤末端面和薄膜之间形成F-P干涉腔，整个传感头外径只有125μm。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。