Method and apparatus for automatically controlling output of laser diode

An apparatus for automatically controlling an output of a laser diode based on the results of a comparison between the current power value of an optical signal output from a laser diode and a basic power value, the apparatus comprising:

• a sampler sampling the current power value output from the laser diode;
• a register unit storing the output of the sampler;
• a basic register unit storing a basic power value, the basic power value being a target value based upon a type of a medium that is to receive the output of the laser diode;
• an operator unit outputting a target output value applied to the laser diode based on the comparison of the current power value stored in the register unit and the basic power value stored in the basic register unit;
• and
• a pulse generator generating a control signal controlling a storage timing of the register unit based on recording data to be recorded by the laser diode.

An apparatus for automatically controlling an output of a laser diode having an optical signal with a current power value, comprising:

• a sampler sampling the current power value of the optical signal from the laser diode;
• an operation unit outputting a target output value based upon a comparison of the sampled current value and a basic power value based upon a type of medium which is to receive the output of the laser diode;
• and
• a controller controlling the output of the laser diode based upon the target output value.

An apparatus for automatically controlling an output of a laser diode having an optical signal with a current power value, comprising:

• a sampler sampling the current power value of the optical signal from the laser diode, to generate a sampled value having a first plurality of bits indicative of a plurality of power levels;
• a basic storage unit storing a basic power value according to a type of a medium which is to receive the output of the laser diode and based upon the plurality of power levels;
• an operation unit simultaneously comparing ones of the first plurality of bits with corresponding ones of the second plurality of bits to generate a target output value;
• and
• a controller controlling the output of the laser diode based upon the target output value.

A method of automatically controlling an output of a laser diode, comprising:

• determining a basic power value based upon a type of a medium that is to receive the output of the laser diode;
• sampling a current power value of an optical signal output from the laser diode;
• comparing the sampled current power value with the basic power value;
• and
• controlling the output of the laser diode based on the compared results.