Media 2: Stress induced birefringence tuning in femtosecond laser fabricated waveguides in fused silica FernandesLuís A. GrenierJason R. HermanPeter R. AitchisonJ. Stewart MarquesPaulo V. S. 2012 Originally published in Optics Express on 22 October 2012 (oe-20-22-24103)