2 research outputs found
Visualization 1: Watt-level passively mode-locked Er<sup>3+</sup>-doped ZBLAN fiber laser at 2.8  μm
The oscilloscope traces of CW mode-locked pulse trains. Originally published in Optics Letters on 01 November 2015 (ol-40-21-4855
Improved Transfer Quality of CVD-Grown Graphene by Ultrasonic Processing of Target Substrates: Applications for Ultra-fast Laser Photonics
In
this paper, we experimentally found that the transfer quality
of CVD-grown graphene could be improved by ultrasonic processing (UP)
of target substrates thanks to the improved hydrophilicity. Atomic
force micrograph and Raman spectroscopy revealed that the graphene
films transferred onto the target substrate with UP possess less wrinkles
and defects than that of the sample without UP. The improvement technique
endows graphene more suitable for photonics applications because of
its weaker optical loss, higher optical damage threshold and longer
stability. By integrating a fiber pigtailed graphene (treated by UP)
device into a fiber laser cavity, we could obtain narrower mode-locked
pulse with higher optical-to-optical conversion efficiency and better
optical spectral profile, in contrast with that without UP, which
further verify the improved transfer quality of graphene by the UP
technique. We anticipate that this transfer technique may be applicable
to boost the performance of other graphene photonics devices, such
as optical modulator, detector, polarizer, etc