Abstract
We propose a scheme for generating a new kind of sideband, i.e., the fraction-order sideband, in an optomechanical system. In the conventional scheme of high-order sideband generation [Opt. Lett. 38, 353 (2013) [CrossRef] ], the sideband interval has a minimum frequency limitation, which is equal to the mechanical frequency ${\omega _b}$, and this limits the precision of the sideband comb. With our proposed fraction-order sidebands, the sideband interval can break that limitation and reach ${\omega _b}/n$ ($n$ is an integer). The scheme we propose can be realized by driving the optomechanical system with three laser fields, including a control field (${\omega _c}$) and two probe fields (${\omega _{\!p}}$, ${\omega _{\!f}}$), in which the detuning between ${\omega _c}$ and ${\omega _{\!p}}$ is equal to the mechanical frequency ${\omega _b}$, while the detuning between ${\omega _c}$ and ${\omega _{\!f}}$ is equal to ${\omega _b}/n$. In this case, we find that not only the integer-order (high-order) sidebands, but also the fraction-order sidebands, and the sum and difference sidebands between the integer- and fraction-order sidebands, will appear in the output spectrum. Moreover, the sideband interval becomes ${\omega _b}/n$, and it can be decreased by increasing $n$. Our work paves the way to achieve a tunable optical frequency comb based on the optomechanical system.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Jun-Hao Liu, Ya-Fei Yu, Qin Wu, Jin-Dong Wang, and Zhi-Ming Zhang
Opt. Express 29(8) 12266-12277 (2021)
Shaopeng Liu, Wen-Xing Yang, Zhonghu Zhu, Tao Shui, and Ling Li
Opt. Lett. 43(1) 9-12 (2018)
Hao Xiong, Liu-Gang Si, Xin-You Lü, Xiaoxue Yang, and Ying Wu
Opt. Lett. 38(3) 353-355 (2013)