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Generate ultra-short pulses at 50 attoseconds and beyond.(R & D roundup)(Brief article)
RESEARCHERS ARE INCREASINGLY leveraging ultra-short light pulses in areas as diverse as high small-scale lithography and high-speed switching and communications. In fact, a simple system for attosecond pulse generation using optic devices known as multistage microring resonators has been proposed by P.P. Yupapin and S. Chaiyasoonthorn from King Mongkut's Institute of Technology (Ladkrabang, Bangkok) and N. Pornsuwancharoen from both King Mongkut's and Rajamangala University of Technology Isan (Sakonnakon, Thailand).
Essentially, a soliton light pulse with a 1550-nm wavelength feeds multistage microring resonators. There, the ring radii of the recently integrated devices ranges from 5 to 10 [mu]m. When input peak power of 12 W is applied to the system, a pulse with of 50 attoseconds is achieved.
The researchers make use of the nonlinear behavior of light traveling in a microring resonator, when a soliton pulse is entered into the nonlinear Kerr ...
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