Open AccessHigh-repetition-rate Q-switched fiber laser with high quality topological insulator Bi_2Se_3 film
Author(s) -
Zhenhua Ye,
Yanrong Song,
Jinrong Tian,
Zhiyuan Dou,
Heyang Guoyu,
Kexuan Li,
Hongwei Li,
Xinping Zhang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011508
Subject(s) - saturable absorption , materials science , topological insulator , fiber laser , optics , q switching , laser , pulse duration , erbium , optoelectronics , doping , physics , quantum mechanics
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 μs. 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.