Ivan Richter | Searcharxiv

arXiv2024

Guiding light through quasi-TE modes embedded in the radiation continuum

We introduce a new type of a bound state in the continuum (BIC) which appears in the photonic structure consisting of two coupled waveguides where one of them supports a discrete eigenmode spectrum embedded in the continuum of the other one. A BIC appears when the coupling is suppressed by suitable tuning of structural parameters. In contrast to the previously described configurations, our scheme facilitates genuine guiding of quasi-TE modes in the core with the lower refractive index.

physics.optics↗

arXiv2024

Power output optimization in complex laser systems by means of polarization control

Recently, the polarimetricmethod for thermally-induced polarization changes driven power losses (TIPCL) mitigation in complex laser systems has been developed. However, the final optimization relied on the four-parameter numerical process. This letter provides a fully analytical direct calculation alternative to this optimization process. The validity of this approach is demonstrated on the previously published data from pulsed laser system Bivoj/DiPOLE100. The new approach provides a deeper insight into the polarimetric method for TIPCL suppression and also brings a more precise, reliable, and faster alternative to the numerical process used earlier.

physics.optics↗