Correlated Photon Pair Generation in Silicon Wire Waveguides at 1.5 μm

Monat, C. P. Clark, Xiong +7 more

Ju Won Choi, Byoung‐Uk Sohn, George F. R. Chen +2 more

Takesue, Fukuda, Tsuchizawa +4 more

Jierong Cheng, Wei Zhang, Qiang Zhou +3 more

Correlated photon pairs at 1.5μm are generated in a silicon wire waveguide (SWW) with a length of only 1.6mm. Experimental results show that the single-side count rates on both sides increase quadratically with pump light, indicating that photons are generated from the spontaneous four-wave mixing (SFWM) processes. The quantum correlation property of the generated photons is demonstrated by the ratio between coincident and accidental coincident count rates. The highest ratio measured at room temperature is to be about 19, showing that generated photon pairs have strong quantum correlation property and low noise. What is more, the wavelength correlation property of the coincident count is also measured to demonstrate the correlated photon pair generation. The experimental results demonstrate that SWWs have great potential in on-chip integrated low-noise correlated photon pair sources at 1.5 μm.

Ning Lv, Wei Zhang, Yuan Guo +3 more

A method to measure the end-output coupling efficiencies between silicon wire waveguides (SWWs) and optical fibers is proposed and demonstrated. The end-output coupling efficiency is calculated through four measured counting rates based on the correlated photon pair generation in the SWW. It provides a way to investigate and optimize the coupling processes at the input and output end of the optical waveguides separately.

Heedeuk Shin, Cheol Shin Won, Kyung Deuk Park