DISCONTINUOUS MODULATION RESPONSE OF GRATING-ASSISTED EXTENDED-CAVITYSEMICONDUCTOR-LASERS

The resonant enhancement of the small-signal intensity modulation resp onse of a grating-assisted extended-cavity semiconductor laser is show n to occur in dual peaks centred near the harmonics of the cavity reso nance fluency. Each response peak is bifurcated into two closely space d peaks of different amplitudes and bandwidths. The position of the br oader of the two peaks depends on the operating power of the laser. A strong discontinuity in the response amplitude is observed near the ha rmonics of the cavity resonance fluency.