Quantum noise suppression using optical fibers

Zhang Lin-b

When a narrow-linewidth laser is transferred through a single-mode optical fiber,the phase noise induced by the environment,results in broadening of the laser linewidth.In this article,we introduced the basic principle of the fiber phase noise suppression,and established the experimental system of it.In the experiment we observed the laser phase noise suppression effect through the system of the fiber phase noise suppressing of a 20 m single-mode fiber,the precision of the optical frequency transfer is better than 3×10-18.

Daniel F. Walls, P. D. Drummond, Alistair S. Lane +3 more

Charles A. McLemore, Marco Pomponio, Takuma Nakamura +4 more

We develop a new understanding of how to optimally suppress environmental noise in fiber links, leading to active noise suppression more than 10 dB beyond the currently accepted limit for localized noise.

P. L. Knight

Yunxia Liu

It is important to generate high quality photon pairs in the highly nonlinear optical fiber for practical applications of quantum information.Based on analysis of the principle of the generation of photon pairs by means of four-wave-mixing in optical fiber,main factors influencing noise generation of photon pairs have been presented.Several methods to suppress the noise have been discussed.With a cooled DSF,a short pulse and a narrow filtering bandwidth,signal and idler photons that generate with greater wavelength separation space from the bump,and high quality photon pairs with a better signal to noise ratio can be achieved in the highly nonlinear fiber.

P. L. Knight