6533b7d8fe1ef96bd12699ae

RESEARCH PRODUCT

Etched LPFGs in reflective configuration for sensitivity and attenuation band depth increase

Abian B. SocorroJose L. CruzIgnacio R. MatiasJesus M. CorresIgnacio Del VillarGaspar Rego

subject

Materials scienceOptical fiberPhysics::OpticsPolarization-maintaining optical fiber02 engineering and technology01 natural sciences010309 optics020210 optoelectronics & photonicsDouble-clad fiberOptics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringPlastic optical fiberGratingsMode volumeMulti-mode optical fiberbusiness.industrySingle-mode optical fiberLong-period fiber gratingCladding (fiber optics)Atomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsOptical fiber transducersReflection configurationOptoelectronicsbusiness

description

A reflection configuration setup for long-period fiber gratings is presented. It permits to obtain a unique band with attenuation double than that obtained in transmission configuration, which is interesting for applications where this value is reduced (e.g., the mode transition phenomenon). The method is based on the deposition of a silver mirror at the end of the optical fiber, which permits to absorb the power transmitted through cladding modes and to avoid the generation of interferometric bands. The method also solves the requirement of a precise cleave or to polish the end of the grating, a drawback present in other publications. The versatility of the setup has been proved by application of the cladding etching technique until the attenuation band corresponding with the first guided mode in the cladding is visualized in an optical spectrum analyzer. The experimental results are supported by the numerical data obtained with a method based on the exact calculation of core and cladding modes and the utilization of coupled mode theory This work was supported in part by the Spanish Ministry of Education and Science-FEDER TEC2013-43679-R and TEC2013-46643-C2-1-R.

yearjournalcountryeditionlanguage
2016-05-15
10.1109/lpt.2016.2529701https://hdl.handle.net/2454/28102