Patent ID: 6862302
Filing Date: 2005-03-01
Classification: H01S

Abstract:
1. A method of measuring and recording current bias values and current swing values to be used by a controller of an optoelectronic apparatus that includes an optical transmitter and an optical receiver, so that a laser of the optoelectroilic apparatus is able to maintain desirable optical performance over temperature variations, at least a portion of the method being performed in connection with a testing system and comprising: at a first temperature, adjusting a first bias current and a first current swing of the laser until the laser generates optical signals at a predefined power level and at a predefined extinction ratio; recording first bias current and first current swing values that correspond to the optical signal having the predefined power level and the predefined extinction ratio; connecting the optical transmitter to the optical receiver to create a loop; at a temperature substantially similar to the first temperature, measuring a first optical power level of optical signals generated by the laser under the first bias current; calculating an estimate of a first threshold bias current and a first slope efficiency of the laser associated with the first temperature; at a second temperature, measuring a second bias current and a second slope efficiency of the laser at which a second optical power level of optical signals generated by the laser under the second bias current is substantially the same as the first optical power level; calculating an estimate of a second threshold bias current of the laser associated with the second temperature; and calculating an estimate of a second current swing based at least in part on the first bias current, the first threshold bias current, the second bias current, the second threshold bias current and the first current swing.