We report all-fiber passively Q-switched Tm3+-doped tellurite fiber lasers. The composite tellurite fiber is specially designed to improve the mechanical strength. Both carbon nanotubes (CNTs)
and semiconductor saturable absorber mirror (SESAM) are inserted separately into the laser
cavities as saturable absorbers to demonstrate a fiber integrated setup. In a short, 9 cm tellurite fiber, 1.86 μm pulsed lasers without self-mode-locking effect are demonstrated by in-band pumping at 1.59 μm. An average power of 84 mW is obtained in CNT pulsed laser with 860 ns duration while in SESAM pulsed laser, the average power reaches 21mW with 516 ns pulse width.This work was supported in part by the National Natural Science Foundation of China under Grant 61308084, Natural Science Foundation of Shanghai under Grant 12ZR1451600, and Granted Membership of Youth Innovation Promotion Association, Chinese Academy of Sciences.This is the accepted manuscript. The final version is available from IEEE at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6998013
