title: Symmetrical 1x2 digital photonic splitting switch with low electrical power consumption in SiGe waveguides.
abstract: A symmetrical digital photonic splitting switch with a low insertion loss and a low driving voltage is developed using carrier injection in a silicon-germanium material for optical communication systems and networks at a wavelength of 1.55 mum. The switch structure has been improved based on a traditional 1x2 Y-shaped configuration by using two widened carrier injection regions. The switch has a threshold voltage of 1.0 V and a corresponding threshold current of 85 mA on one of the two output waveguide arms. The calculated driving current density is 5.7 kA/cm2 and the calculated power consumption is 85 mW at the 85 mA of threshold current. The measured insertion loss and the crosstalk are 5.2 dB and -9.6 dB, respectively, at driving voltage over 2 V.
authors.forename: Baojun
authors.initials: B
authors.lastname: Li
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lihua
authors.initials: L
authors.lastname: Teng
authors.forename: Yuzhou
authors.initials: Y
authors.lastname: Zhao
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Chua
authors.forename: Xiangrong
authors.initials: X
authors.lastname: Wang