An optical module installed within an optical transmitter apparatus is disclosed. The optical module provides an electrically insulating carrier, a semiconductor element, and a capacitor. The carrier provides a ground pattern and a bias pad. The ground pattern mounts the capacitor and the semiconductor element thereon. The bias pad is electrically isolated from the ground pattern thereby forming a parasitic capacitor against the ground pattern. The optical module further includes at least two bonding wires among a first bonding wire connecting the semiconductor element with the bias pad, a second bonding wire connecting the bias pad with the capacitor, and an additional bonding wire connecting the capacitor with the semiconductor element. The semiconductor element is supplied with a bias current through the at least two bonding wires.