Theoretical seminar | 25 May 2022

Institute of Applied Physics RAS
Nonlinear and laser effects in optical microresonators made of different glasses

The presentation is devoted to high-Q optical glass microresonators with whispering gallery modes. In such resonators, broadband nonlinear optical transformations of a low-power CW pump are effectively implemented due to the action of Kerr and Raman nonlinearities, including the generation of optical frequency combs. In the case of using rare-earth ion doped samples, laser generation with controllable parameters is attained. Silica microspheres are a very convenient platform for studying non-linear processes and demonstrating new concepts because they can be easily fabricated from standard telecom optical fibers and their dispersion can be controlled by controlled diameter changes. Microspheres made of chalcogenide and tellurite glasses are also of great interest. These glasses are transparent in the mid-IR and have significantly higher nonlinearities compared to silica ones. Therefore tellurirte and chalcogenide microresonators can expand the opportunities of silica microdevices, which is also discussed.

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