Journal
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
Volume 114, Issue 5, Pages 782-791Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063776112040140
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Funding
- Government of the Russian Federation for State Support of Scientific Research
- Russian Foundation for Basic Research [09-02-00848a, 10-02-01016a]
- Ministry of Education and Science [2.1.1/9824]
- Australian Research Council [FT100100160]
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The frequency dependence of the gain required to compensate for absorption is determined for a layered structure consisting of alternating absorbing and amplifying layers. It is shown that the fulfillment of the same conditions is required for the existence of a band structure consisting of alternating bands allowed and forbidden for optical radiation propagation in the frequency-wave vector parametric region. Conditions are found under which the gain required for compensation is smaller than thresholds for absolute (parasitic lasing) and convective (waveguide amplification of radiation) instabilities.
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