From the market analysis of small bending-radius G.657 Single-Mode Fibers（SMF）

this paper comes to the conclusion that their usage currently account for 2.3% of the total SMF usage in China and its demand will constantly grow with the development of FTTH.In view of this

it makes a detailed study of the evolutions of the international and national technical standards for the G.657 SMF.For example

the latest ITU-T G.657 standard increases the fiber mode-field diameter to（8.6～9.5）±0.4μm

increases the requirements of 1 383nm wavelength attenuation of G.657 Bfibers to less than or equal to 0.40dB/km and decreases their attenuation coefficients from 0.50dB/km to 0.40dB/km at 1 310nm wavelength.It is expected that the domestic fiber manufacturers can timely adjust their fiber development and production in compliance with the changes of the international standards to meet the market demand.