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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 12, Iss. 9 — Sep. 1, 1995
  • pp: 1741–1746

Secondary pulsations driven by spatial hole burning in modulated vertical-cavity surface-emitting laser diodes

A. Valle, J. Sarma, and K. A. Shore  »View Author Affiliations


JOSA B, Vol. 12, Issue 9, pp. 1741-1746 (1995)
http://dx.doi.org/10.1364/JOSAB.12.001741


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Abstract

It is shown that significant optical power is generated in secondary pulsations after switch-off of vertical-cavity surface-emitting laser diodes (VCSEL’s) when the laser is modulated from an above-threshold state to a current that is at or below the threshold value. It is found from simulations that the optical power in the secondary pulsations can be as much as 25% of the power in the lasing state. The initial reduction of optical output power subsequent to the switch-off permits a spatial redistribution of charge carriers that in turn permits a transient recovery of the modal gain above the threshold value, thus enabling the secondary pulsations to occur. The phenomenon occurs as a result of the interplay between the transverse-mode structure and the gain medium and, as such, cannot be predicted by spatially independent rate equation models. Implications of the phenomenon for practical applications of VCSEL’s with pseudorandom nonreturn-to-zero modulation formats are pointed out.

© 1995 Optical Society of America

Citation
A. Valle, J. Sarma, and K. A. Shorey, "Secondary pulsations driven by spatial hole burning in modulated vertical-cavity surface-emitting laser diodes," J. Opt. Soc. Am. B 12, 1741-1746 (1995)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-12-9-1741

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