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Title: Investigation of core compositions for efficient 976 nm lasing from step index large-mode-area fiber
Authors: Li, Huizi
Chen, Shaoxiang
Sidharthan, Raghuraman
Ma, Jie
Xia, Nan
Chang, Chen Jian
Kim, Jaesun
Yoo, Seongwoo
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Li, H., Chen, S., Sidharthan, R., Ma, J., Xia, N., Chang, C. J., Kim, J. & Yoo, S. (2020). Investigation of core compositions for efficient 976 nm lasing from step index large-mode-area fiber. IEEE Photonics Technology Letters, 32(23), 1457-1460.
Journal: IEEE Photonics Technology Letters
Abstract: We present an efficient 976 nm fiber laser achieved in a step index large-mode-area (LMA) fiber by 915 nm diode pumping. The 976 nm lasing was enabled using spectroscopic engineering in a fiber design that helps suppress the competing 1030 nm gain. Our study shows, alumino-phospho-silicate (Al:P) is advantageous for shaping a gain spectrum in favor of 976 nm compared to other widely used compositions, hence facilitating otherwise the challenging 976 nm lasing. In addition, a germanium (Ge)-cladding was introduced to achieve LMA and low numerical aperture step-index fiber, permitting a wavelength selective bending technique. By applying the bending technique, an efficient 976 nm lasing was achieved with up to 15 W output power (pump power limited) with 28% slope efficiency in the step-index LMA fiber.
ISSN: 1041-1135
DOI: 10.1109/LPT.2020.3033993
Schools: School of Electrical and Electronic Engineering 
Research Centres: Center for Optical Fiber Technology
The Photonics Institute 
Rights: © 2020 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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