Journal
OPTICS EXPRESS
Volume 22, Issue 10, Pages 11508-11515Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.011508
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Funding
- 973 program [2013CB922404]
- National Scientific Research Project of China [61177047]
- National Natural Science Foundation of China [61235010]
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We demonstrated a high-repetition-rate Q-switched fiber laser with topological insulator Bi2Se3 absorber. The absorber was made into a film structure by spin-coating method using few-layer Bi2Se3 nano-platelets which had regular shape. The uniform film had a low saturable optical intensity of 11 MW/cm(2), which is the lowest saturable optical intensity in the saturable absorbers made by topological insulator till now. By inserting the absorber film into an Erbium-doped fiber laser, a high-repetition Q-switched laser with the repetition rates from 459 kHz to 940 kHz was achieved. The maximum output power was 22.35 mW with the shortest pulse duration of 1.9 mu s. To the best of our knowledge, both of the repetition rate and the output power were the highest values among the Q-switched fiber lasers with topological insulator absorber. (C) 2014 Optical Society of America
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