Tm-doped fiber laser delivering tunable single-wavelength and switchable dual-wavelength pulses

摘要

We propose a tunable single-wavelength and switchable dual-wavelength Tm-doped fiber laser based on carbon nanotubes. The central wavelength of single-wavelength mode-locking opera don can be tuned from 1892 to 1924 nm. The laser can also exhibit switchable dual-wavelength mode locking between the center wavelength of 1883/1894 nm and 1905/1910 nm. All the tunable or switchable operation is realized by rotating or squeezing the polarization controller. The flexible all-fiber laser can provide two different mode locking operations, which is convenient and attractive for practical applications.