An implantable cardiac rhythmfunction management system integrates cardiac contractility modulation and one or more other therapies, such as to preserve device safety, improve efficacy, enhance sensing and detection, or enhance therapy effectiveness and delivery. A wafer for use in manufacturing a magnetic recording head is also included. The high frequency signal path and the low frequency signal path are separated by a cut-off transition frequency that is different for each signal path set. In an exemplary embodiment, the laser source system includes first and second laser sources and an integrator that combines the laser beam pulses generated by the first and second laser sources to form combined laser beam pulses.