LAUSR

Abstract Ideal optical isolator is indispensable for building quantum networks and ubiquitous in modern communication technology. Here, we study how to realize ideal optical isolator in a common two-cavity optomechanical system with optomechanical interaction and linearly-coupled interaction. The scheme relies on the interference between the two interactions. We derive the essential conditions to realize ideal optical isolator, especially for the case of unequal cavity damping rate, and analyse the properties of optical nonreciprocal transmission with different mechanical damping rates. These results can be used to control optical transmission in quantum information processing.