All-fiberized continuous-wave Yb-doped fiber lasers operating near 980 nm are fabricated, and 1.73 W, 980 nm lasing is obtained. Moreover, the output properties of the 980 nm fiber laser are studied by experiment. It is demonstrated, for the first time to the best of our knowledge, that the output power curve versus the active fiber length experiences double-peak values, which are caused by the red shift of the lasing wavelength induced by the longitudinal-mode competition. It is also demonstrated that the pump threshold increases exponentially with the active fiber length. The relationship between the pump threshold and the optimum active fiber length is examined.
© 2013 Optical Society of America
Lasers and Laser Optics
Original Manuscript: May 14, 2013
Revised Manuscript: July 18, 2013
Manuscript Accepted: July 19, 2013
Published: August 14, 2013
Ruixing Wang, Ying Liu, Jianqiu Cao, Shaofeng Guo, Lei Si, and Jinbao Chen, "Experimental study on the all-fiberized continuous-wave ytterbium-doped laser operating near 980 nm," Appl. Opt. 52, 5920-5924 (2013)