Quantitative test of general theories of the intrinsic laser linewidth

Alexander Cerjan, Adi Pick, Y. D. Chong, Steven G. Johnson, A. Douglas Stone

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We performa first-principles calculation of the quantum-limited laser linewidth, testing the predictions of recently developed theories of the laser linewidth based on fluctuations about the known steady-state laser solutions against traditional forms of the Schawlow-Townes linewidth. The numerical study is based on finite-difference time-domain simulations of the semiclassical Maxwell-Bloch lasing equations, augmented with Langevin force terms, and includes the effects of dispersion, losses due to the open boundary of the laser cavity, and non-linear coupling between the amplitude and phase fluctuations (αfactor). We find quantitative agreement between the numerical results and the predictions of the noisy steady-state ab initio laser theory (N-SALT), both in the variation of the linewidth with output power, as well as the emergence of side-peaks due to relaxation oscillations.

Original languageAmerican English
Pages (from-to)28316-28340
Number of pages25
JournalOptics Express
Volume23
Issue number22
DOIs
StatePublished - 2 Nov 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Optical Society of America.

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