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Conferences > CLEO_Europe > 2013 > CM_6 > CM_6_7
  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper CM_6_7

Fabrication of ultra-low bend loss optical waveguides

A. Arriola, S. Gross, N. Jovanovic, N. Charles, P. G. Tuthill, S. M. Olaizola, A. Fuerbach, and M. J. Withford

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Abstract

We present a novel way to fabricate low bend loss femtosecond-laser written optical waveguides [1] via a two-step process: We first fabricate large-diameter waveguides which are multimode at 1550 nm and exhibit a relatively complex refractive index distribution. In a second step, thermal post-processing [2] results in the selective removal of part of the previously induced refractive index change, leaving behind a very high index contrast waveguide that enables single mode operation in the C-band. We demonstrate that this procedure enables the fabrication of waveguides with unprecedented small bends (down to 16.6 mm radius) [3] with high (80%) normalized throughputs.

© 2013 IEEE

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