(?)　(?)光(Guang)纤(Xian)实(Shi)际(Ji)是(Shi)指(Zhi)由(You)透(Tou)明(Ming)材(Cai)料(Liao)做(Zuo)成(Cheng)的(De)纤(Xian)芯(Xin)和(He)在(Zai)它(Ta)周(Zhou)围(Wei)采(Cai)用(Yong)比(Bi)纤(Xian)芯(Xin)的(De)折(Zhe)射(She)率(Lu)稍(Shao)低(Di)的(De)材(Cai)料(Liao)做(Zuo)成(Cheng)的(De)包(Bao)层(Ceng)，(?)并(Bing)将(Jiang)射(She)入(Ru)纤(Xian)芯(Xin)的(De)光(Guang)信(Xin)号(Hao)，(?)经(Jing)包(Bao)层(Ceng)界(Jie)面(Mian)反(Fan)射(She)，(?)使(Shi)光(Guang)信(Xin)号(Hao)在(Zai)纤(Xian)芯(Xin)中(Zhong)传(Chuan)播(Bo)前(Qian)进(Jin)的(De)媒(Mei)体(Ti)。(?)
 

　(?)　(?)光(Guang)纤(Xian)放(Fang)大(Da)器(Qi)是(Shi)指(Zhi)运(Yun)用(Yong)于(Yu)光(Guang)纤(Xian)通(Tong)信(Xin)线(Xian)路(Lu)中(Zhong)，(?)实(Shi)现(Xian)信(Xin)号(Hao)放(Fang)大(Da)的(De)一(Yi)种(Zhong)新(Xin)型(Xing)全(Quan)光(Guang)放(Fang)大(Da)器(Qi)。(?)根(Gen)据(Ju)它(Ta)在(Zai)光(Guang)纤(Xian)线(Xian)路(Lu)中(Zhong)的(De)位(Wei)置(Zhi)和(He)作(Zuo)用(Yong)，(?)一(Yi)般(Ban)分(Fen)为(Wei)中(Zhong)继(Ji)放(Fang)大(Da)、(?)前(Qian)置(Zhi)放(Fang)大(Da)和(He)功(Gong)率(Lu)放(Fang)大(Da)三(San)种(Zhong)。(?)
 

　(?)　(?)光(Guang)纤(Xian)放(Fang)大(Da)器(Qi)分(Fen)为(Wei)稀(Xi)土(Tu)掺(Chan)杂(Za)和(He)利(Li)用(Yong)非(Fei)线(Xian)性(Xing)效(Xiao)应(Ying)制(Zhi)作(Zuo)两(Liang)种(Zhong)。(?)稀(Xi)土(Tu)掺(Chan)杂(Za)式(Shi)是(Shi)利(Li)用(Yong)光(Guang)纤(Xian)中(Zhong)稀(Xi)土(Tu)掺(Chan)杂(Za)物(Wu)质(Zhi)引(Yin)起(Qi)的(De)增(Zeng)益(Yi)机(Ji)制(Zhi)实(Shi)现(Xian)光(Guang)放(Fang)大(Da)的(De)。(?)其(Qi)中(Zhong)掺(Chan)铒(Er)式(Shi)的(De)工(Gong)作(Zuo)波(Bo)长(Chang)为(Wei)1550nm波(Bo)段(Duan)，(?)目(Mu)前(Qian)已(Yi)经(Jing)商(Shang)品(Pin)化(Hua)并(Bing)大(Da)量(Liang)应(Ying)用(Yong)于(Yu)光(Guang)纤(Xian)通(Tong)信(Xin)系(Xi)统(Tong)。(?)
 

　(?)　(?)光(Guang)纤(Xian)放(Fang)大(Da)器(Qi)技(Ji)术(Shu)就(Jiu)是(Shi)在(Zai)光(Guang)纤(Xian)的(De)纤(Xian)芯(Xin)中(Zhong)掺(Chan)入(Ru)能(Neng)产(Chan)生(Sheng)激(Ji)光(Guang)的(De)稀(Xi)土(Tu)元(Yuan)素(Su)，(?)通(Tong)过(Guo)激(Ji)光(Guang)器(Qi)提(Ti)供(Gong)的(De)直(Zhi)流(Liu)光(Guang)激(Ji)励(Li)，(?)使(Shi)通(Tong)过(Guo)的(De)光(Guang)信(Xin)号(Hao)得(De)到(Dao)放(Fang)大(Da)。(?)传(Chuan)统(Tong)的(De)光(Guang)纤(Xian)传(Chuan)输(Shu)系(Xi)统(Tong)是(Shi)采(Cai)用(Yong)光(Guang)—电(Dian)—光(Guang)再(Zai)生(Sheng)中(Zhong)继(Ji)器(Qi)，(?)这(Zhe)种(Zhong)中(Zhong)继(Ji)设(She)备(Bei)影(Ying)响(Xiang)系(Xi)统(Tong)的(De)稳(Wen)定(Ding)性(Xing)和(He)可(Ke)靠(Kao)性(Xing)，(?)为(Wei)去(Qu)掉(Diao)上(Shang)述(Shu)转(Zhuan)换(Huan)过(Guo)程(Cheng)，(?)直(Zhi)接(Jie)在(Zai)光(Guang)路(Lu)上(Shang)对(Dui)信(Xin)号(Hao)进(Jin)行(Xing)放(Fang)大(Da)传(Chuan)输(Shu)，(?)就(Jiu)要(Yao)用(Yong)一(Yi)个(Ge)全(Quan)光(Guang)传(Chuan)输(Shu)型(Xing)中(Zhong)继(Ji)器(Qi)来(Lai)代(Dai)替(Ti)这(Zhe)种(Zhong)再(Zai)生(Sheng)中(Zhong)继(Ji)器(Qi)。(?)
 

　(?)　(?)光(Guang)纤(Xian)放(Fang)大(Da)器(Qi)的(De)市(Shi)场(Chang)应(Ying)用(Yong)广(Guang)泛(Fan)，(?)主(Zhu)要(Yao)是(Shi)应(Ying)用(Yong)于(Yu)通(Tong)讯(Xun)行(Xing)业(Ye)，(?)将(Jiang)输(Shu)入(Ru)讯(Xun)号(Hao)的(De)功(Gong)率(Lu)放(Fang)大(Da)，(?)可(Ke)以(Yi)实(Shi)现(Xian)多(Duo)途(Tu)径(Jing)的(De)应(Ying)用(Yong)。(?)我(Wo)们(Men)经(Jing)常(Chang)使(Shi)用(Yong)到(Dao)的(De)电(Dian)视(Shi)、(?)广(Guang)播(Bo)等(Deng)都(Du)要(Yao)使(Shi)用(Yong)到(Dao)这(Zhe)样(Yang)的(De)设(She)备(Bei)，(?)而(?)且(Qie)它(Ta)是(Shi)通(Tong)信(Xin)系(Xi)统(Tong)中(Zhong)不(Bu)能(Neng)够(Gou)缺(Que)少(Shao)的(De)重(Zhong)要(Yao)部(Bu)件(Jian)，(?)其(Qi)重(Zhong)要(Yao)性(Xing)显(Xian)而(?)易(Yi)见(Jian)。(?)
 

　(?)　(?)应(Ying)用(Yong)场(Chang)合(He)：(?)
 

　(?)　(?)1、(?)电(Dian)子(Zi)行(Xing)业(Ye)中(Zhong)部(Bu)件(Jian)检(Jian)测(Ce)；(?)
 

　(?)　(?)2、(?)医(Yi)药(Yao)行(Xing)业(Ye)中(Zhong)，(?)药(Yao)片(Pian)药(Yao)丸(Wan)计(Ji)数(Shu)；(?)
 

　(?)　(?)3、(?)低(Di)对(Dui)比(Bi)度(Du)应(Ying)用(Yong)，(?)比(Bi)如(Ru)断(Duan)线(Xian)检(Jian)测(Ce)；(?)
 

　(?)　(?)4、(?)色(Se)标(Biao)高(Gao)速(Su)检(Jian)测(Ce)或(Huo)产(Chan)品(Pin)边(Bian)缘(Yuan)定(Ding)位(Wei)。(?)