Abstract
This contribution discusses techniques for the fabrication of Er-doped LiNbO3 waveguide devices, the optical properties of Er:LiNbO3, the optical amplification on the basis of a simple mode overlap rate equation model for a three-level system and gives experimental results achieved so far with Er-doped LiNbO3 waveguide amplifiers and lasers.
According to the numerical simulations a small signal gain of about 20 dB seems to be feasible in Ti:Er:LiNbO3 strip guides. In first experiments unsaturated, broadband (1.53 < λ< 1.62 μm) small signal optical gain up to 2.8 dB at λ = 1.532μm in low-loss ( ≈ 0.1 dB/cm scattering loss), single mode, Er-diffused Ti:LiNbO3 channels has been observed. At the same wavelength cw laser operation with about 0.3 nm emission linewidth and 1.5% external slope efficiency was achieved in a waveguide cavity designed for double-pass pumping. Both devices were pumped without evidence of photorefractive damage at λp =1477 nm wavelength using a color center laser.
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References
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Suche, H. (1992). Erbium-Doped LiNbO3 Waveguide Amplifiers and Lasers. In: Ostrowsky, D.B., Reinisch, R. (eds) Guided Wave Nonlinear Optics. NATO ASI Series, vol 214. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2536-9_12
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DOI: https://doi.org/10.1007/978-94-011-2536-9_12
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