由于用自聚纤维作光通信系统的传输线有损耗低、畸变小等优点,因而68年以来国外对自聚纤维的研究非常活跃。虽然为了大幅度地降低损耗,近年来国外很多人正在研制用石英掺杂法制自聚纤维的问题,但是由于多组分的玻璃容易拉丝,所以甩超净原料熔化低损舞玻璃,再用这种玻璃制自聚纤维的问题也在继续研究,而且进展很快。日本用双坩锅制出的自聚焦纤维73年的水平是每公里损耗14分贝,据说最近已降到了10分 Since self-assembled optical fiber transmission system for optical communication system has the advantages of low loss, small distortion, etc., so 68 years since the study of foreign fibers very active. Although in order to drastically reduce the loss, many people abroad are developing the problem of self-polydextrose by quartz doping in the recent years. However, since multi-component glass is easy to draw, the ultra-clean raw material is used to melt the low-loss glass, The problem of self-assembling glass fibers is also continuing to study, and the progress is fast. The level of self-focusing fibers produced by Japan's twin crucibles in 73 years was 14 decibels per kilometer, which is said to have dropped to 10 recently