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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 21, Iss. 23 — Dec. 1, 1996
  • pp: 1930–1932

Pulse energy equalization in harmonically FM mode-locked lasers with slow gain

K. Tamura and M. Nakazawa  »View Author Affiliations


Optics Letters, Vol. 21, Issue 23, pp. 1930-1932 (1996)
http://dx.doi.org/10.1364/OL.21.001930


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Abstract

Harmonic mode locking in lasers with slow gain relaxation times requires fast intensity-dependent loss (fast loss) to equalize the pulse energies. A practical method to obtain fast loss is to use self-phase modulation and spectral filtering (SPM+F). We show that in a frequency modulation mode-locked laser SPM+F produces a fast loss only when the cavity dispersion is anomalous. In the absence of SPM the dispersion creates a gain imbalance between the pulsing modes in the upchirped and downchirped modulation cycles, which causes one mode to dominate over the other.

© 1996 Optical Society of America

History
Original Manuscript: July 9, 1996
Published: December 1, 1996

Citation
K. Tamura and M. Nakazawa, "Pulse energy equalization in harmonically FM mode-locked lasers with slow gain," Opt. Lett. 21, 1930-1932 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-23-1930

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