Spectral Structure of Phase-Induced Intensity Noise in Recirculating Delay Lines

M. Tur, B. Moslehi, J. E. Bowers, S. A. Newton, K. P. Jackson, J. W. Goodman, C. C. Cutler, H. J. Shaw

Research output: Contribution to journalArticlepeer-review


The dynamic range of fiber optic signal processors driven by relatively incoherent multimode semiconductor lasers is shown to be severely limited by laser phase-induced noise. It is experimentally demonstrated that while the noise power spectrum of differential length fiber filters is approximately flat, processors with recirculating loops exhibit noise with a periodically structured power spectrum with notches at zero frequency as well as at all other multiples of 1/(loop delay). The experimental results are aug-mented by a theoretical analysis.

Original languageEnglish
Pages (from-to)22-27
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 19 Sep 1983
Externally publishedYes


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