Studies and Solvers > Study and Study Step Types > Bidirectionally Coupled Ray Tracing

Bidirectionally Coupled Ray Tracing
The Bidirectionally Coupled Ray Tracing study () is used to compute ray trajectories that are affected by external fields. This study solves for all degrees of freedom related to rays using a Time-Dependent Solver. All other degrees of freedom are computed using a Stationary Solver. The two solvers are repeated using a For-End For loop so that a self-consistent solution is obtained, taking the bidirectional coupling between the propagating rays and stationary fields into account.
The study can be used to model thermal lensing effects, in which heat generated by the attenuation of rays in an absorbing medium changes the shape and refractive index of the domain. The changes to refractive index and shape, in turn, affect the ray trajectories. This study is available with the Ray Tracing Module.