据英《新科学家》２００１年４月２１日报道：美国哈佛大学的研究人员说，他们可以用激光把波导管“烧进”或“写入”玻璃块内，形成传输全部光纤线路的玻璃光电开关。即是说，不久的将来，操纵光信号的光电开关可能用玻璃块取代。 光纤可以同时传输许多路电话及其它数据流。为 According to the British “New Scientist” reported on April 21, 2001: Researchers at Harvard University in the United States said that they can “burn in” or “write” a waveguide of a glass tube with a laser to form a glass optical fiber that transmits all the optical fiber lines switch. That is, in the near future, optical switches that manipulate optical signals may be replaced by glass blocks. Optical fiber can transmit many road calls and other data streams simultaneously. for