Astigmatism compensation for waveguide inscription in optical fiber by femtosecond lasers

被引：1
|
作者：
Pallares-Aldeiturriaga, D. [1 ,2 ]
Roldan-Varona, P. [1 ]
Rodriguez-Cobo, L. [2 ]
Lopez-Higuera, J. M. [1 ,2 ,3 ]
机构：
[1] Univ Cantabria, Photon Engn Grp, E-39005 Santander, Spain
[2] Inst Salud Carlos III, CIBER Bbn, Madrid 28029, Spain
[3] Inst Invest Sanitaria Valdecilla IDIVAL, Cantabria, Spain
来源：
SEVENTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS (EWOFS 2019) | 2019年 / 11199卷
关键词：
Femtosecond lasers; waveguides; optical fibers; gaussian beams;
D O I：
10.1117/12.2539835
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The cylindrical geometry of optical fibers produces an astigmatic distortion in a wavefront focused within it. In the case of femtosecond lasers, this produces a fluence loss that decreases its processing performance. In this work, the phase change produced by an astigmatic femtosecond laser beam (direct exposition to the) and a corrected beam (applying a simple adaptive optics process) is compared. The astigmatic correction decreases the modification threshold by approximately a magnitude order and changes the sign of the refractive index change at low pulse energies.
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页数：4
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