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Proceedings Paper

Waveguide arrays and spectral filtering for multi-frequency mode-locked pulse sources
Author(s): Edward Farnum; Brandon G. Bale; J. Nathan Kutz
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Paper Abstract

Current optical fiber-communication networks increasingly rely on wavelength-division multiplexing (WDM) technologies in conjunction with optical time-division multiplexing (OTDM) of individual WDM channels. The combination of high-repetition-rate data streams with a large number of WDM channels has pushed transmission rates to nearly 1 TB/s, creating a demand for all-optical transmission sources that can generate pico-second modelocked pulses at various wavelengths. Through nonlinear mode-coupling in a wave-guide array and a periodically applied multi-notch frequency filter, robust multi-frequency mode-locking can be achieved in a laser cavity in both the normal and anomalous dispersion regimes. We develop a theoretical description of this multiplewavelength mode-locking, and characterize the mode-locked solutions and their stability for an arbitrary number of frequency channels. The theoretical investigations demonstrate that the stability of the mode-locked pulse solutions of multiple frequency channels depends on the degree of inhomogenity in gain saturation. Specifically, only a small amount of inhomogeneous gain-broadening is needed for multi-frequency operation in the laser. In this presentation, the conditions on the system parameters necessary for generating stable mode-locking is explored for arbitrary number of frequency channels. The model suggests a promising source for multi-frequency photonic applications.

Paper Details

Date Published: 5 August 2009
PDF: 9 pages
Proc. SPIE 7386, Photonics North 2009, 73862E (5 August 2009); doi: 10.1117/12.837773
Show Author Affiliations
Edward Farnum, Kean Univ. (United States)
Brandon G. Bale, Aston Univ. (United Kingdom)
J. Nathan Kutz, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 7386:
Photonics North 2009

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