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.

Analysis of optical axis variations in monolithic nonplanar ring laser

“…Nilsson et al [9] expounded the polarization matching theory of geometrical structure parameters design. Zang et al [10] investigated the tradeoffs between minimizing the magnetic field and finding a reasonable fabrication tolerance in the design of NPROs. NPRO laser is expected to operate with a stable optical axis in various applications.…”