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Proceedings Paper

Mode locking through nonlinear frequency broadening and spectral filtering
Author(s): Michel Piche
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Paper Abstract

The propagation of symmetrical laser pulses in a Kerr medium produces a broadening of the pulse spectrum while that of nonsymmetrical pulses leads also to a spectral shift. Such a spectral reshaping can be used to mode lock a laser by inserting two spectral filters with different transmission profiles at the ends of a laser cavity including a Kerr material; it can be shown that short pulses travelling in such a laser experience a higher feedback per round trip than do lower power multimode signals. Numerical simulations tend to indicate that the pulses so produced have a nonsymmetrical shape; their spectrum is shifted with respect to that of multimode oscillations. Different considerations suggest that the method may not be self- starting and that another mode-locking technique (active or passive) may be needed to initiate mode locking.

Paper Details

Date Published: 5 January 1994
PDF: 8 pages
Proc. SPIE 2041, Mode-locked and Other Ultrashort Laser Designs, Amplifiers, and Applications, (5 January 1994); doi: 10.1117/12.165631
Show Author Affiliations
Michel Piche, COPL/Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 2041:
Mode-locked and Other Ultrashort Laser Designs, Amplifiers, and Applications
Michel Piche; Paul W. Pace, Editor(s)

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