title: Relaxed alignment tolerance of monolithic ring lasers.
abstract: An investigation of relaxed alignment tolerance in monolithic ring lasers is presented. It was found that the relaxed alignment tolerance is strongly dependent on the out-of-plane angle. A preferred region for the out-of-plane angle is proposed. In this region the resonator has greatly relaxed alignment tolerances, and the unidirectional operation can be obtained under a much-lower magnetic field. Two lasers have been constructed in the region, and satisfactory performance was found, in good agreement with the theoretical analysis.
authors.affiliation: Quantum Department, National Institute of Metrology, Joint Laboratory of Advanced Technology in Measurements of China, 18 Beisanhuan East Road, Beijing 100013, China. ejzang@nim.ac.cn
authors.forename: Er Jun
authors.initials: EJ
authors.lastname: Zang
authors.forename: Jianping
authors.initials: J
authors.lastname: Cao
authors.forename: Mingchen
authors.initials: M
authors.lastname: Zhong
authors.forename: Chengyang
authors.initials: C
authors.lastname: Li
authors.forename: Naicheng
authors.initials: N
authors.lastname: Shen
authors.forename: Dongmei
authors.initials: D
authors.lastname: Hong
authors.forename: Lianrong
authors.initials: L
authors.lastname: Cui
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhu
authors.forename: Anhan
authors.initials: A
authors.lastname: Liu