Open AccessA pulsewidth measurement technology based on carbon-nanotube saturable absorber
Author(s) -
Pushan Xiao,
Kan Wu,
Dong Mao,
Jianping Chen
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.004188
Subject(s) - saturable absorption , ultrashort pulse , femtosecond , materials science , carbon nanotube , optics , absorption (acoustics) , self phase modulation , nanometre , pulse (music) , optoelectronics , distortion (music) , pulse shaping , nonlinear optics , laser , fiber laser , nanotechnology , physics , wavelength , amplifier , cmos , detector
We demonstrate a proof-of-concept saturable absorption based pulsewidth measurement (SAPM) by exploring the intensity dependent nonlinear transmission (i.e., saturable absorption) of low-dimensional material (LDM) carbon nanotubes. A minimum pulse energy of 75 fJ is experimentally detected with an average-power-peak-power product (P av ⋅ P pk ) of 5.44×10 -7 W 2 near 1550 nm. A minimum detectable pulse energy of 10 fJ with a P av ⋅ P pk of 1.3×10 -9 W 2 is estimated with further optimization. The nanometer-level thickness and femtosecond-level decay time of LDMs allow ultrafast light interaction on a very small footprint, which potentially supports chip-scale characterization of ultrafast pulses with minimum distortion.