Data is recorded on packet basis to a track of an optical recording medium and the data is pseudo-erased by erasing contents information of the track having the data. The ASIC has a bi-directional serial protocol i2C communication bus to off chip drivers for monitoring temperature and for adjusting the environment surrounding the package by controlling fans using fan switches and variable voltage controls. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.