APPARATUS AND METHOD FOR ADAPTIVELY CONTROLLING IMPULSE RESPONSE OF OPTICAL SIGNAL OUTPUT FROM LASER OF OPTICAL TRANSMITTER (TX)

摘要

PROBLEM TO BE SOLVED: To allow an optical waveform transmitted from an optical TX into an optical waveguide of an optical link to have a desired waveform shape.SOLUTION: An apparatus and a method of a closed loop type are provided for adaptively adjusting the impulse response of an optical signal output from the laser of the optical TX based on optical feedback detected by at least one photodiode for monitoring. Adaptively adjusting the impulse response of the optical signal output from the laser in this way allows the optical TX to dynamically adapt to and compensate for a wide range of factors that typically cause performance degradation and result in reduced product yields, increased testing times, and increased test complexity, and higher costs. This, in turn, allows manufacturing tolerances and alignment tolerances to be relaxed, test times and test complexity to be reduced, and overall manufacturing and testing costs to be reduced.