Passively Q-switched erbium-doped fiber laser using Fe3O4-nanoparticle saturable absorber
Abstract
We experimentally demonstrate passively Q-switched erbium-doped fiber laser (EDFL) operation using a saturable absorber (SA) based on Fe3O4 nanoparticles (FONPs). As a type of transition metal oxide, the FONPs have a large nonlinear optical response and fast response time. The FONP-based SA possesses a modulation depth of 8.2% and nonsaturable absorption of 56.6%. Stable passively Q-switched EDFL pulses with an output pulse energy of 23.76 nJ, a repetition rate of 33.3 kHz, and a pulse width of 3.2 µs were achieved when the input pump power was 110 mW. The laser features a low threshold pump power of ∼15 mW.
- Publication:
-
Applied Physics Express
- Pub Date:
- April 2016
- DOI:
- 10.7567/APEX.9.042701
- arXiv:
- arXiv:1511.07016
- Bibcode:
- 2016APExp...9d2701B
- Keywords:
-
- Physics - Optics
- E-Print:
- 4 pages,6 figures