Broadband frequency correlated photon pairs using a chirped-QPM device
Akira Tanaka, Ryo Okamoto, Hwan Hong Lim, Shanthi Subashchandran, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Toru Hirohata, Sunao Kurimura, Shigeki Takeuchi · 2013
We report the observation of the broadest frequency correlation of two-photon states to date via parametric down conversion using chirped QPM device. The two-photon correlation in time domain can be compressed to 3.3 cycles.