Chinese Optics Letters, 2013, 11 (6): 063201, Published Online: Apr. 28, 2013
Self-starting harmonic mode-locked Tm-Bi co-doped germanate f iber laser with carbon nanotube-based saturable absorber 
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Abstract
We report a ring cavity passively harmonic mode-locked fiber laser using a newly developed thuliumbismuth co-doped fiber (TBF) as a gain medium in conjunction with a carbon nanotube (CNT)-based saturable absorber. The TBF laser generates a third harmonic mode-locked soliton pulse train with a high repetition rate of 50 MHz and a pulse duration of 1.86 ps. The laser operates at 1 901.6 nm with an average power of 6.6 mW, corresponding to a pulse energy of 0.132 nJ, at a 1 552 nm pump power of 723.3 mW.
N. Saidin, D. I. M. Zen, S. S. A. Damanhuri, S. W. Harun, H. Ahmad, F. Ahmad, K. Dimyati, A. Halder, M. C. Paul, M. Pal, S. K. Bhadra. Self-starting harmonic mode-locked Tm-Bi co-doped germanate f iber laser with carbon nanotube-based saturable absorber[J]. Chinese Optics Letters, 2013, 11(6): 063201.
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