Mode locked fiber laser in the C band region for dual wavelength ultrashort puls

A saturable absorber is commonly employed to generate an ultrashort laser with a mode-locking scheme. In an erbium-doped fiber laser system, the laser regimes of either 1530 or 1550?nm wavelength are procured based on the absorption profile of the erbium-doped fiber. The absorption of the erbium-dop