Narrowband Bragg reflectors in Ti:LiNbO<sub>3</sub> optical waveguides and implantation to optical modulators

R. Kim; J. Zhang; O. Eknoyan; H. F. Taylor; T. L. Smith

doi:10.1117/12.698772

9 February 2007 Narrowband Bragg reflectors in Ti:LiNbO₃ optical waveguides and implantation to optical modulators

R. Kim, J. Zhang, O. Eknoyan, H. F. Taylor, T. L. Smith

Proceedings Volume 6475, Integrated Optics: Devices, Materials, and Technologies XI; 64750E (2007) https://doi.org/10.1117/12.698772
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

Bragg grating reflectors etched in amorphous silicon overlay films have been integrated with Ti:LiNbO₃ optical waveguides. Narrow (0.05 nm) reflectance spectrum with > 20 dB dip in the transmittance spectrum have been obtained at a wavelength of 1542.7 nm for TE polarization. The reflectance in the channel waveguides depends strongly on the depth of the etched grating. The effect of the Bragg waveguide loss factor on the transmittance and reflectance spectra is investigated using a model for contradirectional coupling that includes an attenuation coefficient. Good agreement between model predictions and experimental results is obtained. Applications of such integrated gratings in the fabrication of distributed feedback type and Fabry-Perot type electrooptic intensity modulators, for low switching voltage and high extinction needs, are demonstrated.

Citation Download Citation

R. Kim, J. Zhang, O. Eknoyan, H. F. Taylor, and T. L. Smith "Narrowband Bragg reflectors in Ti:LiNbO₃ optical waveguides and implantation to optical modulators", Proc. SPIE 6475, Integrated Optics: Devices, Materials, and Technologies XI, 64750E (9 February 2007); https://doi.org/10.1117/12.698772

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