CUED Publications database

Wideband-tuneable, nanotube mode-locked, fibre laser.

Wang, F and Rozhin, AG and Scardaci, V and Sun, Z and Hennrich, F and White, IH and Milne, WI and Ferrari, AC (2008) Wideband-tuneable, nanotube mode-locked, fibre laser. Nat Nanotechnol, 3. pp. 738-742.

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Abstract

Ultrashort-pulse lasers with spectral tuning capability have widespread applications in fields such as spectroscopy, biomedical research and telecommunications. Mode-locked fibre lasers are convenient and powerful sources of ultrashort pulses, and the inclusion of a broadband saturable absorber as a passive optical switch inside the laser cavity may offer tuneability over a range of wavelengths. Semiconductor saturable absorber mirrors are widely used in fibre lasers, but their operating range is typically limited to a few tens of nanometres, and their fabrication can be challenging in the 1.3-1.5 microm wavelength region used for optical communications. Single-walled carbon nanotubes are excellent saturable absorbers because of their subpicosecond recovery time, low saturation intensity, polarization insensitivity, and mechanical and environmental robustness. Here, we engineer a nanotube-polycarbonate film with a wide bandwidth (>300 nm) around 1.55 microm, and then use it to demonstrate a 2.4 ps Er(3+)-doped fibre laser that is tuneable from 1,518 to 1,558 nm. In principle, different diameters and chiralities of nanotubes could be combined to enable compact, mode-locked fibre lasers that are tuneable over a much broader range of wavelengths than other systems.

Item Type: Article
Uncontrolled Keywords: Equipment Design Fiber Optic Technology Lasers Nanotechnology Nanotubes, Carbon Semiconductors
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:24
Last Modified: 14 Jul 2014 01:07
DOI: 10.1038/nnano.2008.312

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