Abstract

Different strategies for designing optical couplers, optimized to enhance the pump absorption in the rareearth- doped core of microstructured fiber lasers, are illustrated. Three kinds/configurations of optical couplers have been designed and compared as examples of the different design strategies which can be followed. Their effectiveness to enhance the performance of an ytterbium-doped, double cladding, microstructured optical fiber laser has been accurately simulated. They consist of a suitable cascade of multiple long-period gratings (MLPGs) inscribed in the fiber core region. The characteristics of the MLPG couplers have been simulated via a homemade computer code based on both rate equations and an extended coupled mode theory. The proposed MLPG couplers seem particularly useful in the case of low rare-earth concentration but, even for a middle-high ytterbium concentration, as NYb 5 × 1025 ions∕m3, the slope efficiency S can be increased up to 20%, depending on the fiber length.

Autore Pugliese

• Mescia Luciano , Prudenzano Francesco

Tutti gli autori

• Prudenzano F , Mescia Luciano , Palmisano Tommaso , Surico Michele , De Sario Marco , Righini Giancarlo Cesare

Titolo volume/Rivista

APPLIED OPTICS

Anno di pubblicazione

2012

ISSN

1559-128X

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

10

Ultimo Aggiornamento Citazioni

2017-04-23 03:20:56

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile