• Acta Photonica Sinica
  • Vol. 48, Issue 3, 314002 (2019)
ZHANG Ze-yu1、*, AN Hai-tao1, WANG Xu2, XIE Ying-wu1, ZHANG Hua1, LIU Qing3, CHEN Li-gong1, and YANG Bo1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    DOI: 10.3788/gzxb20194803.0314002 Cite this Article
    ZHANG Ze-yu, AN Hai-tao, WANG Xu, XIE Ying-wu, ZHANG Hua, LIU Qing, CHEN Li-gong, YANG Bo. Nd3+∶Photo-thermo-refractive Glass Waveguides Written by Femtosecond Laser[J]. Acta Photonica Sinica, 2019, 48(3): 314002 Copy Citation Text show less

    Abstract

    Femtosecond laser with central wavelength of 1 028 nm, repetition rate of 50 kHz and pulse width of 220 fs is used to write double line and tubular depressed cladding waveguides in Nd3+ doped photo-thermo-refractive glass. The influences of laser power, double line separation and diameters of tubular depressed cladding waveguide on the near-field modes of waveguides are investigated, and the waveguides with better guiding mode are obtained. Refractive index profile is reconstructed by intensity distribution of the near-field mode, the largest positive refractive index change for these two types of waveguides is +7.0×10-4 and +5.5×10-4, respectively. By using the scattering technique, the propagation loss of double line waveguide is about 1.29 dB/cm. The loss of tubular depressed cladding waveguide is less than 1.95 dB/cm by testing the insert loss. Therefore, waveguides inscribed directly by femtosecond laser in Nd3+ doped photo-thermo-refractive glass are promising candidates for the development of integrated optical device.
    ZHANG Ze-yu, AN Hai-tao, WANG Xu, XIE Ying-wu, ZHANG Hua, LIU Qing, CHEN Li-gong, YANG Bo. Nd3+∶Photo-thermo-refractive Glass Waveguides Written by Femtosecond Laser[J]. Acta Photonica Sinica, 2019, 48(3): 314002
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