Currently, ordinary electronic switches operate at 4 GHz, and scientists at the University of Twente in the Netherlands and the French Institute of Nanoscience and Cryogenic Engineering have developed a semiconductor planar microcavity switch that achieves a repetition rate of 1.4 THz.

FTTH can provide each access user with access bandwidth of 20M ~ 50M, or even 100M, which can fully meet the needs of the entire broadband popularization speed project; replace the original copper cable with optical cable, replace the electrical signal with optical signal, greatly reduce the network The failure rate also saves the operator's maintenance costs and energy consumption. In addition, its long-distance coverage, 20-year lifespan, safety performance and other factors make no operator d

Xīnnián yīshǐ, xùn shí quánqiú guāng tōngxùn shìchǎng dòngtài yuè bào yī'èr yuè hé kān yǐ tuīchū, tíxǐng gè huìyuán cháshōu. Běn yuè yuèkān tuīchū de zhuāntí wèi:2013 Nián guāng tōngxìn qiánjǐng fēnxī.