OPTICAL TRANSMITTER AND PHOTONIC INTEGRATED CIRCUIT THEREOF

A photonic integrated circuit (PIC) is adapted to an optical transmitter. The optical transmitter includes a printed circuit board (PCB), a photonic integrated circuit, and a set of PCB bond wires. The PCB includes a transmitter circuit with a set of signal output ports. The photonic integrated circuit includes a substrate, a micro ring modulator and a matching circuit. The substrate has a set of input pads. The micro ring modulator is located on the substrate and includes a set of electrical pads. The input pads are electrically connected to the electrical pads. The matching circuit is electrically connected to the electrical pads. The PCB bond wires are electrically connected to the signal output ports and the input pads. An impedance value of the matching circuit and the PCB bond wires substantially matches the modulation impedance value.