Wideband-tuneable, nanotube mode-locked, fibre laser

Wang, Frank, Rozhin, Aleksey, Sun, Zhipei, Scardaci, Vittorio, White, Ian H., Hennrich, Frank, Milne, William I. and Ferrari, Andrea C. (2008). Wideband-tuneable, nanotube mode-locked, fibre laser. Nature Nanotechnology, 3 (2 Nove), pp. 738-742.

Abstract

Ultrashort-pulse lasers with spectral tuning capability have widespread applications in fields such as spectroscopy, biomedical research and telecommunications1–3. Mode-locked fibre lasers are convenient and powerful sources of ultrashort pulses4, and the inclusion of a broadband saturable absorber as a passive optical switch inside the laser cavity may offer tuneability over a range of wavelengths5. Semiconductor saturable absorber mirrors are widely used in fibre lasers4–6, but their operating range is typically limited to a few tens of nanometres7,8, and their fabrication can be challenging in the 1.3–1.5 mm wavelength region used for optical communications9,10. Single-walled carbon nanotubes are excellent saturable absorbers because of their subpicosecond recovery time, low saturation intensity, polarization insensitivity, and mechanical and environmental robustness11–16. Here, we engineer a nanotube–polycarbonate film with a wide bandwidth (>300 nm) around 1.55 mm, and then use it to demonstrate a 2.4 ps Er31-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.

Publication DOI: https://doi.org/10.1038/nnano.2008.312
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Uncontrolled Keywords: ultrashort-pulse lasers,spectral tuning capability,spectroscopy,mode-locked fibre lasers,broadband saturable absorber,semiconductor saturable absorber mirrors,carbon nanotubes,Bioengineering,Biomedical Engineering,Materials Science(all),Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics
Full Text Link: http://www.natu ... o.2008.312.html
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2008-12
Authors: Wang, Frank
Rozhin, Aleksey ( 0000-0003-2271-8227)
Sun, Zhipei
Scardaci, Vittorio
White, Ian H.
Hennrich, Frank
Milne, William I.
Ferrari, Andrea C.

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