The present invention relates generally to semiconductor lasers and laser scanning systems and, more particularly, to schemes for controlling wavelength in semiconductor lasers. GPAN bridges Grid services serving user applications and network services controlling network devices through its proxy functions such as resource data and management proxies. The second transmitter transmits a time-shifted version of the information via a second channel to the legacy receiver. In the illustrative implementation, the data receiver includes a line receiver, a data and clock recovery circuit, and a demultiplexer and the data transmitter includes a multiplexer, a data and clock encoding circuit, and a line driver.