Proton exchange, anneal proton exchange, and reverse proton exchange waveguides in Er:LiNbO3

Alfonso C. Cino; Stefano Riva Sanseverino; Marc P. De Micheli; Kasem El Hadi; Fernando Cusso; Gines Lifante

doi:10.1117/12.305401

15 April 1998 Proton exchange, anneal proton exchange, and reverse proton exchange waveguides in Er:LiNbO₃

Alfonso C. Cino, Stefano Riva Sanseverino, Marc P. De Micheli, Kasem El Hadi, Fernando Cusso, Gines Lifante

Proceedings Volume 3280, Rare-Earth-Doped Devices II; (1998) https://doi.org/10.1117/12.305401
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

We report the fabrication, characterization and comparison of waveguides in Z-cut Erbium-doped LiNbO₃, obtained by Proton Exchange, Anneal Proton Exchange and Reverse Proton Exchange (RPE). We found that even in the very low proton concentration (α-phase) waveguides, the radiative lifetime reduction, hence the fluorescence quenching, of the ⁴I13/2 yields ⁴I15/2 laser transition due to OH phonons is dramatic. At the contrary, in the RPE waveguides we measured a nearly unaffected lifetime as the ordinary polarized modes are supported by a surface layer nearly free of proton. As it is known that the ordinary polarization is largely advantageous in terms of pump absorption efficiency and relative signal amplification, such waveguides appear to be a workable solution for amplification/lasing around 1.5 μm, provided that the losses due to leakage through the index barrier can be sufficiently reduced.

Citation Download Citation

Alfonso C. Cino, Stefano Riva Sanseverino, Marc P. De Micheli, Kasem El Hadi, Fernando Cusso, and Gines Lifante "Proton exchange, anneal proton exchange, and reverse proton exchange waveguides in Er:LiNbO₃", Proc. SPIE 3280, Rare-Earth-Doped Devices II, (15 April 1998); https://doi.org/10.1117/12.305401

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