Bidirectional mode-locked erbium-doped fiber laser based on an all-fiber gold nanofilm saturable absorber.
Opt Express
; 32(2): 1851-1863, 2024 Jan 15.
Article
in En
| MEDLINE
| ID: mdl-38297728
ABSTRACT
We demonstrate a bidirectional mode-locked erbium-doped fiber laser by incorporating gold nanofilm as a saturable absorber (SA). The gold nanofilm SA has the advantages of high stability and high optical damage threshold. Besides, the SA exhibits a large modulation depth of 26% and a low saturation intensity of 1.22â
MW/cm2 at 1.56â
µm wavelength band, facilitating the mode-locking of bidirectional propagating solitons within a single laser cavity. Bidirectional mode-locked solitons are achieved, with the clockwise pulse centered at 1568.35â
nm and the counter-clockwise one at 1568.6â
nm, resulting in a slight repetition rate difference of 19â
Hz. Moreover, numerical simulations are performed to reveal the counter-propagating dynamics of the two solitons, showing good agreement with the experimental results. The asymmetric cavity configuration gives rise to distinct buildup and evolution dynamics of the two counter-propagating pulses. These findings highlight the advantage of the gold nanofilm SA in constructing bidirectional mode-locked fiber lasers and provide insights for understanding the bidirectional pulse propagation dynamics.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Opt Express
/
Opt. express
/
Optics express
Journal subject:
OFTALMOLOGIA
Year:
2024
Type:
Article