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Proceedings Paper

Actual speed limitations of wavelength switching for optical networks
Author(s): Gavin Mulvihill; Yonglin Yu; Sean O'Duill; Ronan F. O'Dowd
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Paper Abstract

Due to the continuous growth of data traffic current telecommunications systems are being pushed to the extremes of their capacity. Bottlenecks are particularly evident at the routers, where optical to electrical conversion must take place to read the routing information. Using optical only routing, traffic flow would be much more streamlined. Central to this optical routing is the tunable laser, the speed of the routing is obviously dependent on the speed at which the laser can switch between different wavelengths. Wavelength switching is achieved through the application of currents to the front, back and phase sections of the laser. With each change in current there is a corresponding change in the temperature of the laser. It is extremely important to quantify and minimise the temperature effects for stable accurate wavelength output. A measurement rig which had been previously used for high speed switching has been setup under labview control to study these transients. The laser is tuned to a wavelength and then is switched to another wavelength by applying currents to the three sections quickly. A fabry perot interferometer is used to quickly determine the wavelength of the laser.

Paper Details

Date Published: 27 August 2003
PDF: 8 pages
Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.464080
Show Author Affiliations
Gavin Mulvihill, Univ. College Dublin (Ireland)
Yonglin Yu, Univ. College Dublin (Ireland)
Sean O'Duill, Univ. College Dublin (Ireland)
Ronan F. O'Dowd, Univ. College Dublin (Ireland)

Published in SPIE Proceedings Vol. 4876:
Opto-Ireland 2002: Optics and Photonics Technologies and Applications
Vincent Toal; Norman Douglas McMillan; Gerard M. O'Connor; Eon O'Mongain; Austin F. Duke; John F. Donegan; James A. McLaughlin; Brian D. MacCraith; Werner J. Blau, Editor(s)

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