Efficient adjustment of the RF parameters of directly modulated laser diodes with 'RF' light-current parameters

An efficient method of adjusting the RF parameters of directly modulated laser diodes (LDs) is presented. By using the light-current parameters estimated from initial RF measurements, the new bias and modulation currents are obtained self-consistently for the target extinction ratio and average optical power. Experiments performed using distributed feedback lasers show that this adjustment method works efficiently, bringing the initial RF parameters very close to the target values within a couple of iterations. This method can be useful in manufacturing where there is a need to adjust the RF performance of the direct-modulated LDs to a desired specification.