Fig. 2
From: Intracavity optical trapping of microscopic particles in a ring-cavity fiber laser
Dependence of the laser power on the particle position. a Laser power P(r) as a function of particle position r (Eq. (4)) employed in the toy model (dashed line) and the the actual laser power including saturation (solid line). b Intracavity laser power versus position for a 4.9-μm-diameter polystyrene particle obtained from detailed simulations of the intracavity optical trapping. c Corresponding probability density of the particle position (Eq. (5), with parameters P0 = 3 mW, rL = 0.5 μm, κP = 0.1 pN μm−1 mW−1, and T = 300 K). The solid line represents the probability density of the particle position obtained with a standard optical tweezer employing the same average power. d Probability distribution along the transverse x-direction obtained from detailed simulations for a 4.9-μm-diameter polystyrene particle held in the intracavity optical trap. The inset shows that the probability distribution is Gaussian (black line) for small displacements but it is sub-Gaussian for large displacement, where the nonlinear effect plays a leading role
