Dual-wavelength synchronously mode-locked Nd:CNGG laser |
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Authors: | Xie G Q Tang D Y Luo H Zhang H J Yu H H Wang J Y Tao X T Jiang M H Qian L J |
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Affiliation: | School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore. gqxie@ntu.edu.sg |
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Abstract: | We have experimentally demonstrated a dual-wavelength synchronously mode-locked Nd:CNGG laser based on the semiconductor saturable absorber mirror technique. Mode locking was achieved simultaneously on two gain bands of the crystal that have a central wavelength separation of 2.4 nm. The fundamental mode-locked pulse train has a repetition rate of 88 MHz and pulse duration of 5 ps, with an average output power of approximately 90 mW. Autocorrelation measurements show that each of the synchronously mode-locked pulses consists of a train of quasi-periodic beat pulses with a 660 fs pulse width and a 0.63 THz repetition rate. |
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