Nd-doped waveguide amplifiers for heterogeneous integration in optical backplanes

Feridun Ay; Jing Yang; Tobias Lamprecht; Kerstin Wörhoff; Sonia M. García-Blanco; Alfred Driessen; Folkert Horst; Bert J. Offrein; Markus Pollnau

doi:10.1117/12.873981

17 January 2011 Nd-doped waveguide amplifiers for heterogeneous integration in optical backplanes

Feridun Ay, Jing Yang, Tobias Lamprecht, Kerstin Wörhoff, Sonia M. García-Blanco, Alfred Driessen, Folkert Horst, Bert J. Offrein, Markus Pollnau

Author Affiliations +

Proceedings Volume 7942, Optoelectronic Integrated Circuits XIII; 79420Q (2011) https://doi.org/10.1117/12.873981
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

The optical amplifier performance of Nd³⁺-doped polymer and amorphous Al₂O₃ channel waveguides with single-mode and multi-mode behavior around 880 nm is compared. Internal net gain in the wavelength range 865-930 nm is investigated under continuous-wave excitation near 800 nm, for Nd³⁺ dopant concentrations typically in the range of 0.6- 1.0 × 10²⁰ cm^-3. A peak gain of 2.8 dB at 873 nm is obtained in a 1.9-cm-long polymer waveguide at a launched pump power of 25 mW. The small-signal gain measured in a 1-cm-long sample is 2.0 dB/cm. In Al₂O₃, a peak gain of 1.57 dB/cm in a short and 3.0 dB in a 4.1-cm-long waveguide is obtained at 880 nm. Tapered multi-mode Nd³⁺-doped amplifiers are embedded into an optical backplane and a maximum 0.21 dB net gain is demonstrated in a structure consisting of an Al₂O₃:Nd³⁺ amplifier placed between two passive polymer waveguides on an optical backplane. The gain can be further enhanced by increasing the pump power and improving the waveguide geometry, and the wavelength of amplification can be adjusted by doping other rare-earth ions.

Citation Download Citation

Feridun Ay, Jing Yang, Tobias Lamprecht, Kerstin Wörhoff, Sonia M. García-Blanco, Alfred Driessen, Folkert Horst, Bert J. Offrein, and Markus Pollnau "Nd-doped waveguide amplifiers for heterogeneous integration in optical backplanes", Proc. SPIE 7942, Optoelectronic Integrated Circuits XIII, 79420Q (17 January 2011); https://doi.org/10.1117/12.873981

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