Electro-optic coupling of wide wavelength range in linear chirped-periodically poled lithium niobate and its applications.
We theoretically investigate the electro-optic coupling in an optical superlattice of linear chirped-periodically poled lithium niobate. It is found that the electro-optic coupling in such optical superlattice can work in a wide wavelength range. Some of examples, with bandwidths of 20, 40, 80, 120 nm, are demonstrated. The way to determine the electric field for perfect conversion between o- and e-ray and the method using apodized crystals of tanh profile to reduce the ripples are shown. As one of its applications, one kind of broadband Solc-type bandpass filter in optical communication range is proposed.
Zeng
Xiao-qi
XQ
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China.
Chen
Li-xiang
LX
Tang
Hai-bo
HB
Zhang
Bing-zhi
BZ
Zhong
Dong-zhou
DZ
She
Wei-long
WL