Optical damage of Zr:LiNbO3 waveguides produced by proton implantation

Zhang, Chao; Yang, Jin; Chen, Feng; Kong, Yongfa

doi:10.1016/j.nimb.2011.11.027

Cited by 1 publication

(1 citation statement)

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“…From the linear fit of the experimental data, we have determined that the optical damage thresholds are~1.03 Â 10 5 ,~1.14 Â 10 5 , and 1.38 Â 10 5 W/cm 2 for the dual-line waveguides WG1-WG3, respectively, and that is~2.40 Â 10 4 for the depressed cladding waveguide WG4. In previous works for LiNbO 3 , the optical damage thresholds of the 4 mol% Zr 4þ -doped LiNbO 3 planar waveguides and 5 mm-width ridge waveguide produced by proton implantation are 2.8 Â 10 3 W/cm 2 and 9.2 Â 10 4 W/cm 2 , respectively [36]. As of yet, the measured the optical damage threshold of the MgO:LiNbO 3 (doped by 6.5 at.% Mg 2þ ions) 15 mm-width ridge waveguide fabricated by swift O 5þ ion irradiation is 5.6 Â 10 3 W/cm 2 .…”

Section: Resultsmentioning

confidence: 94%

Femtosecond laser written optical waveguides in z-cut MgO:LiNbO3 crystal: Fabrication and optical damage investigation

Cheng

et al. 2016

Optical Materials

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We report on the fabrication of the dual-line waveguides and cladding waveguide in z-cut MgO:LiNbO 3 crystal by femtosecond laser inscription. Due to the diverse modification of refractive index along TE/TM polarization induced by femtosecond laser pulses, the two geometries exhibit different guiding performances: the dual-line waveguides only support extraordinary index polarization, whilst the depressed cladding waveguide supports guidance along both extraordinary and ordinary index polarizations. The measured optical damage of these waveguides at the wavelength of 532 nm is higher than that of the previously reported ion-implanted waveguides in Zr-doped LiNbO 3 . The propagation loss of depressed cladding waveguide is measured as low as 0.94 dB/cm at 632.8 nm wavelength. It is found that the optical damage threshold (~10 5 W/cm 2 ) of the dual-line waveguide is one order of magnitude higher than that of the cladding waveguide (~10 4 W/cm 2 ).

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Section: Resultsmentioning

confidence: 94%