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Proceedings Paper

High-speed broadband tunable lasers
Author(s): Laura E. Adams; Gerald Nykolak; Clyde G. Bethea; Tawee Tanbun-Ek; Roosevelt People; A. Michael Sergent; Paul F. Sciortino; Thomas R. Fullowan
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Paper Abstract

New enabling technologies are needed for optical communication systems to accommodate rapidly growing traffic demands. Wavelength conversion and high-speed optical packet switching/routing will be key technology components for realizing more flexible and efficient optical networks. Lasers capable of wide-band, high-speed wavelength tuning will be essential to support these advanced functions. Also, many applications will require high launch powers in order to access an increasing number of users, nodes, or base stations. Hence, laser transmitters capable of suppressing stimulated Brillouin scattering (SBS) would be highly desirable. We have developed an ultrafast, broadband tunable laser, based on an electroabsorption modulator laser (EML), which exhibits wavelength switching speeds as fast as 56 ps. Here, we report system performance results on wavelength conversion high-speed optical packet switching, and SBS suppression using this device. We have tested multiple wavelength conversion sequences and demonstrated penalty-free transmission through two cascaded wavelength conversion stages including 200 km of standard non-DS fiber. When used to perform packet switching at 2.5 Gb/s, the tunable laser allows switching between optical packets on 4 wavelength channels in less than 1 bit period, thereby requiring no significant guardband. The modulated data packets have been transmitted through 200 km of non-DSF and yield open eye diagrams. The tunable laser has also been used to perform SBS suppression. We have measured SBS thresholds of approximately 25 dBm on 4 separate WDM channels. The required modulation signal is very small, 95 mVpp, and the residual AM is only approximately 1%.

Paper Details

Date Published: 22 December 1997
PDF: 11 pages
Proc. SPIE 3290, Optoelectronic Integrated Circuits II, (22 December 1997); doi: 10.1117/12.298231
Show Author Affiliations
Laura E. Adams, Lucent Technologies/Bell Labs. (United States)
Gerald Nykolak, Lucent Technologies/Bell Labs. (United States)
Clyde G. Bethea, Lucent Technologies/Bell Labs. (United States)
Tawee Tanbun-Ek, Lucent Technologies/Bell Labs. (United States)
Roosevelt People, Lucent Technologies/Bell Labs. (United States)
A. Michael Sergent, Lucent Technologies/Bell Labs. (United States)
Paul F. Sciortino, Lucent Technologies/Bell Labs. (United States)
Thomas R. Fullowan, Lucent Technologies/Bell Labs. (United States)

Published in SPIE Proceedings Vol. 3290:
Optoelectronic Integrated Circuits II
Shih-Yuan Wang; Yoon-Soo Park, Editor(s)

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