Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb:tungstate crystals
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Date
04/2011Author
Grant ID
EP/E06440X/1
EP/D04622X/1
EP/D04622X/1
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We report microspectroscopy measurements of crystalline channel waveguides fabricated in Yb:KGd(WO4)(2) and Yb:KY(WO4)(2) using the ultrafast laser inscription technique. From these measurements we find that densification of the WO2W bridge in the double tungstate crystal lattice is responsible for the refractive index increase, which creates the waveguide confinement. We identified that shifts toward lower energies in the ~760 cm(-1) Raman mode indicate regions, which guide light polarized along the crystallographic b axis, while higher energy shifts in the 682 and 898 cm(-1) Raman lines correspond to guiding regions for light polarized along the crystallographic a axis.
Citation
Bain , F M , Silva , W F , Lagatsky , A A , Thomson , R R , Psaila , N D , Kar , A K , Sibbett , W , Jaque , D & Brown , C T A 2011 , ' Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb:tungstate crystals ' , Applied Physics Letters , vol. 98 , no. 14 , 141108 . https://doi.org/10.1063/1.3573999
Publication
Applied Physics Letters
Status
Peer reviewed
ISSN
0003-6951Type
Journal article
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