Journal
LASER PHYSICS LETTERS
Volume 16, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1612-202X/aaf790
Keywords
fiber lasers; nonlinear optical materials; harmonic mode-locking; bound solitons
Categories
Funding
- National Natural Science Foundation of China (NSFC) [61775107, 61322510]
- National Key Research and Development Program of China [2018YFB0504401, 2018YFB0703501]
- Tianjin Natural Science Foundation, China [16JCZDJC31000]
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We report on the observation of the harmonic mode-locking of bound solitons in an erbium-doped fiber laser with an Sb2Te3 topological insulator saturable absorber (SA) on a microfiber. In the regime, there are two solitons in the bound-state pulses and the soliton separation is almost constant at different pump powers. When changing the pump power from 108 mW to 520 mW, the repetition rate of the bound-soliton mode-locking increases from 8th harmonic (105.6 MHz) to 46th harmonic (607.2 MHz). Our experiment results show that the Sb2Te3 topological insulator SA on microfiber could be not only used as an excellent mode locker, but could also provide a highly nonlinear effect for effectively exploring the multiple pulses in the fiber lasers.
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