| 摘要 |
The present invention provides an optical transmitter that compensates the thermal tracking error. The transmitter comprises a temperature feedback loop including temperature controller that controls the temperature of the laser diode to coincide with the reference temperature by the thermo-electric device. The reference temperature reflects the thermal tracking error that depends on the ambient temperature and that of the target temperature of the laser diode. The transmitter installs a lookup table for providing the reference temperature. The lookup table is rewritten taking the long-term deterioration of the laser diode into account, which is reflected in the increase of the bias current and the forward voltage of the laser diode.
|
