ppt英语讲解

1,Hello everyone, I am from the optical professional,my name is zhangcheng .The title of my speech is fiber optics.

2Now we look at a few pictures, the first pair is a fiber-optic light, the remaining three arethousands of optical fibers have been made. We must have some interest in the optical fiber. Then we'll learn about it.

3，My power point is composed of the following four aspects.One point is The principle of optical fiber Communication.Two point is The types of optical fiber.Three point is The advantages of optical fiber.The last point is The father of optical fiber 4,Optical fiber is made up of very thin glass fiber. The light emitted by the laser is basically in a straight line. It is mainly used for the reflection of light, and the signal is transmitted from one end to the other.

5,Optical fiber communication system is composed of Electricity / Optical Conversion

optical fiber, Optical /Electricity Conversion and other components.

1．光发信机：光发信机是实现电/光转换的光端机.它由光源、驱动器和调制器组成，其功能是将来自于电端机的电信号对光源发出的光波进行调制.

optical transmitter is electrical / optical conversion of optical transceiver implementation. It consists of the illuminant, and the modulator driver components, Its function is to light the signal electric terminal of the light emitted from the modulation.

2．光收信机：光收信机是实现光/电转换的光端机。它由光检测器和光放大器组成，其功能是将光纤或光缆传输来的光信号，经光检测器转变为电信号.

Optical receiver is the light / electricity conversion transmitter. It consists of a light detector and optical amplifier, its function is the fiber or cable to transmit the optical signal, the optical detector is converted into electrical signals.

3．光纤或光缆：光纤或光缆构成光的传输通路。其功能是将发信端发出的已调光信号，经过光纤或光缆的远距离传输后，耦合到收信端的光检测器上去，完成传送信息任务。

The optical fiber constitutes optical transmission path. Its function is the transmitting end of a modulated optical signal, after long distance transmission of optical fiber or cable, coupled to the receiving end of the light detector, to complete the task of transmitting information.

4．中继器：中继器由光检测器、光源组成。

The repeater is composed of an optical detector and a light source.

6,Next,we are familiar with the types of optical fiber.One is the silica fiber.Its function are communication and Image transmission.The other is infrared

optical fiber.It can be used to temperature measurement、Thermal image transmission and Laser scalpel medical care.

7 include ....and....

8 There are many advantages of optical fiber, they are frequency band is wide,loss is low,the weight is light,anti-interference performance is strong ,fidelity is high ,the cost is low.

9,finally ,let’s see the father of optical fiber.