Journal
RESULTS IN PHYSICS
Volume 28, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.rinp.2021.104552
Keywords
Chalcogenide materials; Nonlinear optics; Planar waveguide; Supercontinuum
Funding
- Key Project in Broadband Communication and New Network of the Ministry of Science and Technology (MOST) [2020YFB1805800]
- National Natural Science Foundation of China (NSFC) [U2001601, 61935013, 62005098, 61975242, 62005147]
- Science and Technology Planning Project of Guangdong Province [2018BT010114002]
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Research shows that Ge25Sb10S65 glass has greater hardness and stronger resistance to laser damage, making it suitable for on-chip integrated devices and applications in optical frequency combs or supercontinuum generation.
Chalcogenide glass (ChG) has been fabricated into on-chip integrated waveguides owing to its high nonlinear refractive index. However, the systematic research of Ge-Sb-S glass shows that Ge25Sb10S65 glass has greater hardness and stronger resistance to laser damage than other component glasses considered in this study. Additionally, the high nonlinear refractive index of Ge25Sb10S65 glass makes it a suitable base material for onchip integrated devices. To further verify the application potential of this glass in integrated photonics, a waveguide based on Ge25Sb10S65 glass, with width W = 2 mu m and thickness H = 1.4 mu m, was engineered for supercontinuum generation (SCG). A monolithically integrated SCG spanning from 870 nm to 2480 nm is obtained, when pumped by a femtosecond laser at a central wavelength of 1.55 mu m, with a repetition rate of 1 MHz. The results indicated that the Ge25Sb10S65 glass has great prospects of utilization in on-chip integrated devices for application in optical frequency combs (OFCs) or SCG.
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