A laser system based on a common platform capable of being tailored to meet specific application requirements through simple and flexible means is disclosed. The coarse wavelength response is achieved by utilizing an optical filter. This simplified abstract is not intended to limit, and should not be interpreted as limiting, the scope of the claims. The resistive element may be in the form of a wire wound resistor wound about the core. Therefore, when the coding apparatus is combined with a resynchronization method using both an error correction andor detection code and a synchronization code, it is possible to solve a problem caused by pseudo-synchronization or synchronization-loss pull-out or step-out due to erroneous detection of the synchronization code.