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Stress-induced optical waveguides written by an ultrafast laser in Nd3+, Y3+ co-doped SrF2 crystals

Abstract: In this paper, we report on the ultrafast laser-induced birefringence, refractive index changes, and enhanced photoluminescence properties in the volume of neodymium (Nd), yttrium (Y) co-doped strontium fluoride (SrF2) and Nd, Y co-doped calcium fluoride (CaF2) crystals. The optical waveguides written with 500 kHz repetition rate provided lowest propagation loss of 1.63±0.21??dB?cm?1 for transverse magnetic (TM) polarization at 632.8 nm in Nd,Y:SrF2 crystal. The measured retardance can be interpreted by stress-induced birefringence related to the permanent volume expansion, photo induced by a non-spherical irradiated zone. The absorption, steady-state, and time-resolved photoluminescence properties are also carried out in and out of the laser irradiated zone, enabling the local changes of the Nd and Y network in Nd,Y:SrF2, as well as well-preserved Nd fluorescence in the written optical waveguides.

 Autoría: Hari Babu B., Lyu C., Billotte T., Pallares-Aldeiturriaga D., Poumellec B., Lopez-Higuera J., Hao X., Lancry M.,

 Fuente: Applied Optics, 2019, 58(4), 984-990

Editorial: The Optical Society

 Fecha de publicación: 01/02/2019

Nº de páginas: 7

Tipo de publicación: Artículo de Revista

 DOI: 10.1364/AO.58.000984

ISSN: 1559-128X,2155-3165

Url de la publicación: https://doi.org/10.1364/AO.58.000984

Autores/as

HARI BABU, B.

LYU, CHENGKUN

BILLOTTE, THOMAS

DAVID PALLARES ALDEITURRIAGA

POUMELLEC, BERTRAND

HAO, XIAO TAO

LANCRY, MATTHIEU