Tubular cladding waveguide was inscribed in crystal volume by a femtosecond laser operating at 0.8 μm. The waveguide sustains a single leaking mode at wavelength of 3.39 μm. Propagation losses were investigated experimentallyand theoretically at wavelengths of 1.58 μm and 3.39 μm. Measured losses were found to be as lowas 1.4 dB/cm at 1.58 μm and 5.1 dB/cm at 3.39 μm. Complex propagation constants for leaking modes were obtainedby numerical mode analysis. It was found, that mode leakage is a major factor of losses at wavelength of3.39 μm.
Bibliographical note© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
- cladding waveguide
- femtosecond inscription
- leaking waveguide mode
Okhrimchuk, A. G., Mezentsev, V., & Lichkova, N. (2017). Mid-infrared channel waveguides in RbPb2Cl5 crystal inscribed by femtosecond laser pulses. Optics and Laser Technology, 92, 80-84. https://doi.org/10.1016/j.optlastec.2017.01.009