Journal
OPTICS EXPRESS
Volume 22, Issue 6, Pages 6577-6585Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.006577
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Funding
- Science and Technology Plan Major Projects of Fujian Province [2010I0015, 2012H0048]
- National Nature Science Foundation of China [50902129, 61078076, 91122033, 11304313]
- Knowledge Innovation Program of Chinese Academy of Sciences [KJCX2-EW-H03]
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A novel self-Q-switched and orthogonally polarized dual-wavelength laser has been investigated with Yb3+-doped CGB disordered crystals. By slightly inclining output coupler to introduce the Fresnel loss, we realized simultaneously dual-wavelength laser operation at 1052.6 nm in E//b polarization and 1057.7 nm in E//c polarization with a frequency difference of 1.38 THz. Self-Q-switched pulse generation was observed in this free-running laser, originating from the nonlinear reabsorption effect of Yb:CGB as well as the strong storage of inversion population induced by the long excited-state lifetime (similar to 1 ms). Pulse duration of 287 ns was obtained with an output average power of 416 mW and a repetition rate of 35 kHz. The self-Q-switching effect increased the peak power by 100 times the average power. This very simple laser, free from the complexity and high-cost of additional intracavity polarization modulator and Q-switcher, may be applied for constructing miniature, integrated and portable laser system. (C)2014 Optical Society of America
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