Digital holography for coherent fiber beam combining with a co-propagative scheme.
Opt Express
; 22(19): 23310-4, 2014 Sep 22.
Article
em En
| MEDLINE
| ID: mdl-25321799
ABSTRACT
We present a technique for passive coherent fiber beam combining based on digital holography. In this method, the phase errors between the fibers are compensated by the diffracted phase-conjugated -1 order of a digital hologram. Unlike previous digital holography technique, the probe beams measuring the phase errors between the fibers are co-propagating with the phase-locked signal beams. This architecture is compatible with the use of multi-stage isolated amplifying fibers. It does not require any phase calculation algorithm and its correction is collective. This concept is experimentally demonstrated with three fibers at 1.55 µm. A residual phase error of λ/20 is measured.
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MEDLINE
Assunto principal:
Algoritmos
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Processamento de Sinais Assistido por Computador
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Holografia
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Interpretação de Imagem Assistida por Computador
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Aumento da Imagem
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article