Broad Spectral Pulse Operation of 2 m Tm:YAP Laser
Based on Reflection-Type Carbon Nanotube Absorber¹

Z. S. Qu^a, B. M. Ma^b, X. W. Fan^a, J. Liu^a, *, and Y. G. Wang^c

^a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China

^b School of Information Science and Engineering, Shandong University, Jinan 250100, China

^c Research Center for Applied Sciences, Academia Sinica, Taiwan 30010, China

*e-mail: jieliu@sdnu.edu.cn

Received October 5, 2011; in final form, October 7, 2011; published online February 6, 2012

Abstract—We demonstrated the first use of reflection-type single-walled carbon nanotube (RSWCNT) as a
saturable absorber in the Q-switched mode-locking (QML) of a diode pumped Tm:YAP operating at 2 m. The
spectrum of the QML laser is centered at 1.97 m with a broad spectral region of 36 nm. At the incident pump
power of 10.33 W, as high as 432 mW average output power was produced in QML laser. The repetition rate of
the mode-locked pulse inside the Q-switched envelope was 158 MHz. The dependence of the operational
parameters on the pump power was also investigated experimentally.

DOI: 10.1134/S1054660X12030176

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