Abstract

A theoretical analysis of the pump-induced temperature change and associated thermal phase shift occurring in a pumped doped fiber is presented. Although the primary devices targeted are all-optical switches based on doped fibers, where such effects can be detrimental, this analysis is also applicable to lasers, amplifiers, and other doped fiber devices. The effects of a single pump pulse, multiple pulses and continuous wave (CW) pumping are investigated, both in the dynamic and steady-state regimes. Simple expressions are derived for the thermal relaxation time constant of a fiber, and for its steady-state temperature rise and thermal phase shift under CW pumping. This study predicts that in all-optical fiber switches utilizing a reasonably good dopant the thermal effect due to a single short pulse is negligible in all interferometers, while the steady-state effect can be sizable in a standard fiber Mach-Zehnder but is negligible in a twin-core fiber, a two-mode fiber, and a specially designed Mach-Zehnder interferometer.

[IEEE ]

PDF Article

References

  • View by:
  • |

  1. R. H. Pantell, M. J. F. Digonnet, R. W. Sadowski, and H. J. Shaw, "Analysis of nonlinear optical switching in an erbium-doped fiber," J. Lightwave Technol., vol. 11, pp. 1416-1424, Sept. 1993.

J. Lightwave Technol. (1)

R. H. Pantell, M. J. F. Digonnet, R. W. Sadowski, and H. J. Shaw, "Analysis of nonlinear optical switching in an erbium-doped fiber," J. Lightwave Technol., vol. 11, pp. 1416-1424, Sept. 1993.

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.