Wavelength-switchable femtosecond pulse fiber laser mode-locked by silica-encased gold nanorods. (4th March 2016)

• Record Type: Journal Article
• Authors: Wang, Xude; Luo, Zhichao; Liu, Meng; Tang, Rui; Luo, Aiping; Xu, Wencheng
• Is Part Of: Laser physics letters. Volume 13:Number 4(2016:Apr.)
• Publication Date: 2016-03-04
• Subjects: fiber lasers -- passive mode-locking -- gold nanorods -- silica coating; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-2011/13/4/045101
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: A wavelength-switchable femtosecond pulse fiber laser is demonstrated by using a saturable absorber (SA) of silica-encased gold nanorods (GNRs@SiO2 ). The GNRs@SiO2 SA presents a modulation depth of 4.5% and nonsaturable loss of 32.1%. By properly adjusting the cavity parameters, femtosecond mode-locked pulses centered at 1535.6 nm and 1560.5 nm could be achieved alternately. The durations of pulses at the two wavelengths are measured to be ~403 fs and ~426 fs, respectively. The achieved results indicated that the GNRs@SiO2 could indeed be a promising nonlinear material with excellent photothermal stability and saturable absorption, which could satisfy the requirements for different photonic devices and applications.