Speaker
Description
Stable cavity design and perfect mode-matching of interacting waves along the nonlinear gain medium plays crucial role in development of efficient and stable continuous-wave (CW) optical parametric oscillator (OPO). Here, we develop a particle swarm optimization (PSO)-based framework to optimize the cavity arm lengths of a four-mirror bow-tie ring resonator for stable output power in CW OPO under environment fluctuations and disturbance. We initially model Gaussian beam propagation using ABCD ray matrices in both tangential and sagittal planes, accounting for astigmatism arising from off-axis mirror reflections and refraction in CW OPO based on 50-mm-long MgO-doped periodically-poled lithium niobate, LiNbO3 (MgO:PPLN) with refractive index n=2.1582 at 1800 nm resonating wavelength. The PSO algorithm is then employed to determine optimal cavity arm lengths while satisfying resonator stability condition, |(A+D)/2|<1 and geometric feasibility constraints. The algorithm successfully converges to optimized cavity lengths, yielding a symmetric waist at the crystal centre in both planes. The proposed framework provides a systematic approach to overcome mode-matching instabilities, supporting stable CW OPO output power.
Other Fields of Research (Track) for Abstract
Complex systems and nonlinear dynamics
| Nature of work | Computational |
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