The effect of carboxymethylcellulose host concentration on the performance of mode-locked pulsed laser generation
Document Type
Article
Publication Date
12-1-2021
Abstract
In this work, the effect of changing the polymer host concentration of a film-based saturable absorber (SA) on the performance of a mode-lock laser in an erbium-doped fiber (EDF) ring cavity was demonstrated. Carboxymethylcellulose (CMC) and graphene oxide (GO) films were used as the polymer host and SA respectively with the CMC-GO films being prepared by the solution casting technique. Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM) analysis showed increased interaction taking place between the polymer host and the SA material as the concentration of the polymer host was increased. Xray diffraction (XRD) analysis reveals the formation of SA aggregation. Elements in the CMC-GO films were verified using energy dispersive X-ray (EDX) analysis. The modulation depth for 3 mg/mL of CMC and 5 mg/mL of CMC were 4.9% and 4.3%, respectively. Mode-locked pulse operation using 5 mg/mL has a shorter pulse width and broader 3 dB bandwidth than 3 mg/mL. The peak power and pulse energy of 5 mg/mL mode-locked operation were higher than 3 mg/mL. The film with 5 mg/mL shows better stability which was confirmed by the signal-to-noise ratio results.
Keywords
Carboxymethylcellulose, Graphene oxide, Mode-locked laser, Erbium-doped fiber, Saturable absorber
Divisions
PHYSICS,photonics
Publication Title
Optical Materials
Volume
122
Issue
B
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS