Optical channel waveguides written by high repetition rate femtosecond laser irradiation in Li–Zn fluoroborate glass

Low loss, optical channel waveguides have been successfully produced by high repetition rate femtosecond laser inscription in a Li–Zn fluoroborate glass (64.9B 2 O 3  + 25Li 2 O + 10ZnF 2  + 0.1Er 2 O 3 ). High quality waveguides were produced at 500 kHz, 1 MHz and 2 MHz laser repetition rates, show...

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Bibliographic Details
Published inJournal of optics (New Delhi) Vol. 47; no. 3; pp. 412 - 415
Main Authors Thomas, Sunil, Fernandez, T. Toney, Solis, Javier, Biju, P. R., Unnikrishnan, N. V.
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 01.09.2018
Springer Nature B.V
Subjects
Dependence
Femtosecond pulsed lasers
Lasers
Optical Devices
Optical properties
Optics
Photonics
Physics
Physics and Astronomy
Pulse repetition rate
Refractivity
Repetition
Research Article
Waveguides
Laser writing
Ion migration
Waveguide
Borate glass
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Summary:Low loss, optical channel waveguides have been successfully produced by high repetition rate femtosecond laser inscription in a Li–Zn fluoroborate glass (64.9B 2 O 3  + 25Li 2 O + 10ZnF 2  + 0.1Er 2 O 3 ). High quality waveguides were produced at 500 kHz, 1 MHz and 2 MHz laser repetition rates, showing a refractive index contrast in the range of 3–6 × 10 −3 depending on laser fluences. Dependence of experimental parameters such as average laser power, pulse repetition rate and writing speed on the properties of fabricated waveguides has been discussed. The comparison of optical and compositional characterization techniques evidences an enrichment of B and Zn in the guiding region, while F migrates to the heat diffused region of the written structure.
ISSN:0972-8821
0974-6900
DOI:10.1007/s12596-018-0462-1