Virtual Journal of Laser

Publication year: 2009
Source: Optics & Laser Technology, In Press, Corrected Proof, Available online 10 July 2009
Ian, Yulianti , Abu Sahmah Mohd., Supa’at , Sevia M., Idrus , Abdulaziz M., Al-hetar

A new digital optical switch (DOS) with large branching angle and short device length that exhibits low crosstalk and low power consumption is demonstrated. The Y-branch shape was optimized by introducing constant effective refractive index difference between branches (ΔNeff) along the propagation direction through beam propagation method (BPM) scheme. To provide decreasing local branching angle that results in the improvement of the crosstalk, two modified cosine bend was introduced to form the Y-branch. The modified cosine branch was then connected to a linear branch. The heater electrode was optimized so that the temperature fields induce a constant ΔNeff to satisfy...