A 1300 nm gain-clamped DFB multiple quantum well laser amplifier with
negligible pass-band ripple, 20 dB fiber to fiber gain, and 10 dB redu
ction in gain saturation is demonstrated, The remaining gain saturatio
n is attributed to longitudinal hole burning, After some modifications
the; reduction in gain saturation is improved to more than 30 dB for
an input sig?al having the same polarization state as the lasing mode,
From these experiments and a theoretical analysis it is concluded tha
t there is a potential for realizing highly linear 1300 nm CATV semico
nductor laser amplifiers using gain-clamping with less intermodulation
distortion than today's directly modulated linear semiconductor laser
s.