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Femtosecond pulse generation from a topological insulator mode-locked fiber laser.
- Source :
-
Optics express [Opt Express] 2014 Mar 24; Vol. 22 (6), pp. 6868-73. - Publication Year :
- 2014
-
Abstract
- We reported on the generation of femtosecond pulse in a fiber ring laser by using a polyvinyl alcohol (PVA)-based topological insulator (TI), Bi2Se3 saturable absorber (SA). The PVA-TI composite has a low saturable optical intensity of 12 MW/cm2 and a modulation depth of ~3.9%. By incorporating the fabricated PVA-TISA into a fiber laser, mode-locking operation could be achieved at a low pump threshold of 25 mW. After an optimization of the cavity parameters, optical pulse with ~660 fs centered at 1557.5 nm wavelength had been generated. The experimental results demonstrate that the PVA could be an excellent host material for fabricating high-performance TISA, and also indicate that the filmy PVA-TISA is indeed a good candidate for ultrafast saturable absorption device.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 22
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 24664035
- Full Text :
- https://doi.org/10.1364/OE.22.006868