Double-Loss-Modulated Q-Switched and Mode-Locked
Nd:Lu_0.15Y_0.85VO₄ Laser at 1.34 m with Single-Walled Carbon
Nanotube Saturable Absorber and AO Modulator¹

X. Li^a, G. Q. Li^a, *, S. Z. Zhao^a, B. Zhao^b, L. Yin^a, and Y. G. Wang^c

^a School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology
and Application, Shandong University, Jinan 250100, China

^b College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China

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

*e-mail: gqiuli@sdu.edu.cn

Received August 9, 2011; in final form, August 17, 2011; published online November 28, 2011

Abstract—A diode-pumped dual-loss-modulated Q-switched and mode-locked (QML) Nd:Lu_0.15Y_0.85VO₄
laser at 1.34 m with single-walled carbon nanotube saturable absorber (SWCNT-SA) and acousto-optic (AO)
modulator is demonstrated. The modulation depth of the dual-loss-modulated QML laser reaches 90%, being
deeper than 75% that obtained by the single passively QML laser. The stability of the hybrid QML laser is sig-
nificantly improved if compared to that only with SWCNT-SA. The Q-switched pulse energy and the Q-
switched pulse width of the QML laser with the dual-loss-modulation are 487 and 27% of those only with
SWCNT-SA, respectively.

10.1134/S1054660X12010082

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