• Chinese Optics Letters
  • Vol. 19, Issue 8, 081301 (2021)
Ruonan Li1, Lifei Sun1, Yangjian Cai1、*, Yingying Ren1、**, Hongliang Liu2, Mark D. Mackenzie3, and Ajoy K. Kar3
Author Affiliations
  • 1Center of Light Manipulations and Applications & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
  • 2Institute of Modern Optics, Nankai University, Tianjin 300350, China
  • 3Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
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    Abstract

    Optical channel waveguides with depressed cladding configurations have been produced in Nd,Gd:CaF2 laser crystals by using ultrafast laser inscription. Waveguide properties are investigated in terms of guiding behaviors and localized laser-induced lattice damages. Under an optical pump of 808 nm light, continuous-wave waveguide lasing at 1.06 μm is achieved, with a single-mode operation and a minimum lasing threshold of 98.8 mW. Furthermore, the visible emissions of Nd3+ with short wavelengths ranging from 415 nm to 550 nm and long wavelengths from 550 nm to 625 nm are observed upon 808 nm laser excitation via the up-converted process. The intensity ratios of two wavelength ranges are proved to be tunable through changing the pumping polarizations.
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    Ruonan Li, Lifei Sun, Yangjian Cai, Yingying Ren, Hongliang Liu, Mark D. Mackenzie, Ajoy K. Kar. Near-infrared lasing and tunable upconversion from femtosecond laser inscribed Nd,Gd:CaF2 waveguides[J]. Chinese Optics Letters, 2021, 19(8): 081301
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    Category: Integrated Optics
    Received: Oct. 5, 2020
    Accepted: Dec. 30, 2020
    Posted: Apr. 22, 2021
    Published Online: Apr. 27, 2021
    The Author Email: Yangjian Cai (yangjiancai@sdnu.edu.cn), Yingying Ren (ryywly@sdnu.edu.cn)