Open AccessCVD graphene‐based low pump threshold bidirectional mode‐locked fibre laser
Author(s) -
Chow Kin Kee
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.1546
Subject(s) - materials science , laser , fiber laser , femtosecond , diode , optoelectronics , mode locking , optics , pulse (music) , laser power scaling , wavelength , physics , detector
A passively mode‐locked femtosecond erbium‐doped bidirectional fibre laser with low pump threshold using chemical vapour deposition grown graphene saturable absorbers is demonstrated. Two synchronised and counter‐propagating soliton output pulse trains with a repetition rate of ∼10.38 MHz and pulse widths of 660 and 860 fs are obtained simultaneously from the fibre laser. Simultaneous mode locking of the fibre laser has been realised with a threshold pump power of 56 mW from a single‐pump laser diode, indicating an ∼62% reduction in pump threshold compared to previous results.