Open loop control of SGDBR lasers

An open loop controller for a sampled granting distributed Bragg reflector (SGDBR) laser, comprising:

• a look up table of current settings stored in the controller, each entry in the table corresponding to an optical power and wavelength of the SGDBR laser, each entry in the look up table comprising:
• a first mirror current setting for a first mirror section of the SGDBR laser;
• a second mirror current setting for a second mirror section the SGDBR laser;
• a phase current setting for a phase section of the SGDBR laser;
• and
• a gain current setting for a gain section of the SGDBR laser,
• the first mirror current seating, second mirror current setting, phase current setting, and gain current setting controlling at least one of a group comprising an optical output power and an output wavelength of the SGDBR laser;
• and
• a processor, given a selected optical power and output wavelength, said processor selecting an entry from the look up table and applying the first mirror current setting, the second mirror current setting, the phase current setting and the gain current setting to current sources coupled respectively to the first mirror section, second mirror section, the phase section and the gain section of the SGDBR laser, to control the laser at substantially the selected optical power and output wavelength;
• wherein the SGDBR laser comprises a cavity including the phase section and the gain section and bounded by the first mirror section and the second mirror section.