Noise measurements on distributed-feedback optical amplifiers used as tunable active filters
- 1 January 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 3 (1) , 45-46
- https://doi.org/10.1109/68.68043
Abstract
Resonant, single-mode optical amplifiers that show promise for use as fast, tunable filters in multiwavelength communication networks are discussed. According to recent theoretical predictions, the photocurrent signal-to-noise ratio at the output of such a filter should exhibit a simple dependence on both the mean amplified-signal power and the mean amplified-spontaneous-emission power. This prediction is confirmed via direct measurement of the photocurrent signal-to-noise ratio at the output of a 1.5- mu m distributed-feedback amplifier biased slightly below its lasing threshold.Keywords
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