0.78-0.90-μm wavelength-tunable femtosecond soliton pulse generation using photonic crystal fiber

A compact system of 780-900-nm wavelength tunable femtosecond soliton pulse generation is demonstrated for the first time using a fiber laser, periodically poled LiNbO₃, and a photonic crystal fiber (PCF). The wavelength of the generated soliton pulse can be shifted almost linearly by varying the fiber input power. The temporal width of the generated soliton pulse is as short as 55 fs. The results of numerical analysis suggest that the wavelength of the soliton pulse can be shifted above 1.1 μm using much higher power or a longer PCF. This system is constructed with almost all fiber devices and is compact and useful for practical applications."