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The Cherenkov radiations (CRs) at visible wavelengths are efficiently generated based on the soliton self-frequency shift (SSFS) by coupling the 120fs pulses into the fundamental mode propagated in the multi-knots of a hollow-core photonic crystal fiber cladding (HC-PCFC). When the pump operates at 830nm with the average power of 300mW at the knots 1–4 , the central wavelengths of generated CRs λ...
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