Waveguide electro-optic modulator in fused silica fabricated by femtosecond laser direct writing and thermal poling.
An integrated electro-optic waveguide modulator is demonstrated in bulk fused silica. A Mach-Zehnder interferometer waveguide structure is fabricated by direct writing with a femtosecond laser followed by thermal poling. A 20 degrees electro-optic phase shift is achieved at an operating wavelength of 1.55 microm with an applied voltage of 400 V and an interaction length of 25.6 mm, which correspond to an estimated effective electro-optic coefficient of 0.17 pm/V for the TE-polarized mode.
Li
Guangyu
G
Department of Electrical Engineering and Computer Science, University of Michigan 1301 Beal Avenue, Ann Arbor, Michigan 48109, USA. guangyul@umich.edu
Winick
Kim A
KA
Said
Ali A
AA
Dugan
Mark
M
Bado
Philippe
P