Optical filter is very important components in WDM network. MRR is a basic structure to design the optical filter because of easy to design for improving its performance. This paper discusses an innovative structure of the MRR, which is Triple Coupler Ring Resonators (TCRR) for optical filter applications. Values of width between bus and ring and values of radius of the ring in the structure TCRR were analyzed and optimized for several variations for obtaining coupling coefficient values. Therefore, wide Free Spectral Range (FSR) and high crosstalk suppression bandwidth can be obtained. As results, at the optimized width of gap of 100 nm and the optimized radiation of 8 μm, FSR of 2.85 THz and crosstalk suppression bandwidth of 60 GHz were achieved. Based on the results, this structure can be used for filtering optical signals in optical fiber communication.
An electro-optic (EO) modulator using multi patch antennas is proposed for broadband millimeter-wave bands in pico-cell
radar networks. The proposed device is composed of multi patch antennas with a gap fabricated on a LiNbO3 crystal
bonded with a low-k dielectric material. Multiple millimeter-wave operational frequencies can be received by the multi
patch antennas and converting directly to lightwave signals through the Pockel effects of the LiNbO3 crystal. By adjusting
the metal patch size for receiving with relatively close millimeter-wave frequencies, the bandwidth of the EO modulator
can be enlarged. Based on that, bandwidth of over 30% in millimeter-wave bands can be achieved using the proposed