This scheme can overcome the influence of collective rotation noise of polarization mode in single mode fiber and can work without Shared reference frames.

该方案克服了单模光纤对极化模式集体旋转影响，且不需要校正参考系。

youdao

Shared fiber : The government constructs (or authorizes a private company to construct) a network of fiber optic cables that run from each home in the municipality to a central peering point.

FORBES: Three Broadband Strategies

Over time, as these partnerships grew, expanded fiber capacity could be installed once by the city or the partnership and be shared by many different private companies as well as the city.

FORBES: Bring On The Broadband With Private/Public Partnerships