Broadband Single-Walled Carbon Nanotubes Absorber
for Solid-State Ultrafast Lasers¹

Y. H. Tsang^a, *, Z. S. Qu^b, J. Liu^b, L. L. Tao^a, G. X. Bai^a, and Y. G. Wang^a

^a Department of Applied Physics and Materials Research Center, The HongKong Polytechnic University, HongKong, China

^b College of Physics and Electronics, Shandong Normal University, Jinan, China

*e-mail: Yuen.Tsang@polyu.edu.hk

Received December 31, 2011; in final form, January 3, 2012; published online May 11, 2012

Abstract—The single-walled carbon nanotubes (SWCNT) absorber was fabricated by vertical evaporation
method. Mode-locked picosecond Nd-doped solid-state lasers operating at 1.00 and 1.34 m and Tm-doped
solid-state laser at 2 m with SWCNT absorbers were demonstrated, respectively. Watt-level average output
powers of continuous wave mode locking were obtained. The operational bandwidth of 1 m is broader than
other saturable absorbers fabricated by using other types of materials.

DOI: 10.1134/S1054660X12060138

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