Journal
OPTICS EXPRESS
Volume 22, Issue 15, Pages 18537-18542Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.018537
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Funding
- National Natural Science Foundation of China [11274224]
- Shanghai Shuguang Program [10SG38]
- open program of State Key Laboratory Advanced Optical Communication System and Networks, Shanghai Jiao Tong University [2013GZKF031307]
- Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning
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We demonstrate an all-fiber passively Q-switched erbium-doped fiber laser (EDFL) using a gold-nanosphere (GNS) based saturable absorber (SA) with evanescent field interaction. Using the interaction of evanescent field for fabricating SAs, long nonlinear interaction length of evanescent wave and GNSs can be achieved. The GNSs are synthesized from mixing solution of chloroauricacid (HAuCl4) and sodium citrate by the heating effects of the microfiber's evanescent field radiation. The proposed passively Q-switched EDFL could give output pulses at 1562 nm with pulse width of 1.78 mu s, a repetition rate of 58.1 kHz, a pulse energy of 133 nJ and a output power of 7.7 mW when pumped by a 980 nm laser diode of 237 mW. (C) 2014 Optical Society of America
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