Abstract
In this Letter, we report, to the best of our knowledge, the largest effective single-mode mid-infrared chalcogenide (ChG) fiber. Two thermally matched ChG glasses with a large index contrast of are chosen for constructing all-solid photonic crystal fiber (PCF) with two rings of “holey” microstructured cladding. Single-mode operation is confirmed in the fabricated ChG PCF with a core diameter of 91.2 μm, from both near-field and far-field observation at 4 μm. Ultralow numerical aperture of has been observed at wavelengths between 2.5 and 4.0 μm. The fundamental mode area is calculated to be at 4 μm, where the propagation loss of the ChG PCF is measured to be 5.2 dB/m. Broadband 3.5 and 7.5 μm supercontinuum has been generated in a 35-cm-long ultralarge-mode-area PCF.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Xian Feng, He Ren, Fu Xu, Jindan Shi, Sisheng Qi, Yongsheng Hu, Jinwen Tang, Feng Han, Deyuan Shen, and Zhiyong Yang
Opt. Express 28(11) 16658-16672 (2020)
Lai Liu, Tonglei Cheng, Kenshiro Nagasaka, Hoangtuan Tong, Guanshi Qin, Takenobu Suzuki, and Yasutake Ohishi
Opt. Lett. 41(2) 392-395 (2016)
Christian Rosenberg Petersen, Rasmus D. Engelsholm, Christos Markos, Laurent Brilland, Céline Caillaud, Johann Trolès, and Ole Bang
Opt. Express 25(13) 15336-15348 (2017)