Controllable stretched pulse and dissipative soliton emission using non-linear polarisation rotation and cavity loss tuning mechanism

Author

Sin Jin Tan ; Harun, Sulaiman Wadi ; Ahmad, Harith

Author_Institution

Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia

Volume

7

Issue

2

fYear

2013

fDate

Apr-13

Firstpage

38

Lastpage

41

Abstract

The authors demonstrate a controllable generation of a stretched pulse and dissipative soliton in a normal dispersion erbium-doped fibre laser (EDFL) based on non-linear polarisation rotation technique. It is found that the mode-locking could self-start in the EDFL even without inserting a polariser in the cavity because of the large residual polarisation-dependent loss of a cavity component. By slightly adjusting a polarisation controller, a stretched pulse can be switchable to the dissipative soliton, while maintaining the repetition rate of 2.5 MHz. The stretched pulse has a pulse width of 0.35 ps with energy of 127.6 pJ, whereas the dissipative soliton has a pulse width of 0.60 ps with energy of 208.4 pJ.

Keywords

erbium; fibre lasers; laser cavity resonators; laser mode locking; laser tuning; optical fibre dispersion; optical fibre losses; optical fibre polarisation; optical pulse generation; optical solitons; optical switches; EDFL; cavity loss tuning mechanism; controllable stretched pulse generation; dissipative soliton emission; energy 127.6 pJ; energy 208.4 pJ; frequency 2.5 MHz; mode locking; nonlinear polarisation rotation; normal dispersion erbium-doped fibre laser; optical switching; polarisation controller; repetition rate; residual polarisation-dependent loss;

fLanguage

English

Journal_Title

Optoelectronics, IET

Publisher

iet

ISSN

1751-8768

Type

jour

DOI

10.1049/iet-opt.2012.0078

Filename

6574810