Patent ID: 8903254

Claim:
A transceiver comprising: a photodiode with a transimpedance amplifier; an electro-absorption modulated (EML) laser configured to operate at a working temperature in any of two or more temperature ranges, wherein each of the temperature ranges has a corresponding set value; a bias current control circuit configured to provide a bias current to the EML laser; a microcontroller or microprocessor configured to: determine an internal temperature of said EML laser; determine which of the two or more operating temperature ranges corresponds to said internal temperature of said EML laser; set a predetermined operating temperature value for said EML laser corresponding to said corresponding operating temperature range; and regulate or control said internal temperature of said EML laser based on a difference between said internal temperature of said EML laser and said predetermined operating temperature value; and a directly modulated laser (DML) driving module coupled between (i) said photodiode and transimpedance amplifier and (ii) said EML laser, said DML driving module configured to drive said EML laser.