Femtosecond laser fabrication of volume-phase gratings in CdSxSe1-x-doped borosilicate glass at a low repetition rate

被引：6

作者：

Azkona, J. J. ^{[1
,2
]}

Martinez-Calderon, M. ^{[1
,2
]}

Granados, E. ^{[1
,2
]}

Gomez-Aranzadi, M. ^{[1
,2
]}

Rodriguez, A. ^{[1
,2
]}

Olaizola, S. M. ^{[1
,2
]}

机构：

[1] Ceit, Manuel Lardizabal 15, Donostia San Sebastian 20018, Spain

[2] Univ Navarra, Tecnun, Manuel Lardizabal 15, Donostia San Sebastian 20018, Spain

来源：

APPLIED OPTICS | 2019年 / 58卷 / 16期

关键词：

COUPLED-WAVE THEORY; HOLOGRAPHIC GRATINGS; FUSED-SILICA; DIFFRACTION; SIZE; SEMICONDUCTOR; GUIDES; BRAGG;

D O I：

10.1364/AO.58.004220

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Volume-phase gratings (VPGs) were fabricated in CdSxSe1-x quantum-dot-doped borosilicate glass at a low repetition rate (800 nm, 140 fs, 1 kHz). The VPGs were designed based on rigorous coupled wave analysis simulations. Results indicate that the inscribed thickness (L) is the key parameter to maximize the diffraction efficiency at order 1. Microscope images of the cross sections and diffraction efficiency measurements were taken in order to characterize the modification of the material at different laser-inscription parameters. A maximum VPG diffraction efficiency of 67% (at order 1) was achieved. Also, a refractive index change of Delta n = 2.25.10(-3) is estimated from these VPG diffraction efficiency measurements. The measurements regarding polarization-insensitive diffraction efficiency showed that the birefringence produced in the substrate is negligible. (C) 2019 Optical Society of America

引用

页码：4220 / 4226

页数：7

共 33 条

[1] Volume-phase holographic gratings and their potential for astronomical applications [J].