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WGM microresonator coupling and Erbium Laser

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Published on Feb 23, 2011

This video shows whispering-gallery-mode (WGM) microtoroids under a microscope. The resonator is Erbium doped for lasing operation. Pump laser wavelength band is in 1450nm. Laser is generated in 1550nm band. The green light is due to three-photon upconversion of Er ions. This research was done at Micro/Nanophotonics Lab at Washington University in St. Louis.

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