After introducing the SESAM in the cavity, laser threshold
was significantly increased due to the absorption loss of SESAM.
The best specimen emits an optical power of about 10 mW/facet continuous wave at room temperature and at a pump current of 20% above the laser threshold
The laser threshold
currents were almost constant and it is vary from 1.2 mA to 1.7 mA at temperature from T=15C to 40C, respectively.
NUMERICAL ANALYSIS OF THE PC LASER THRESHOLD
where [I.sub.b]--the laser bias; [I.sub.th]--the laser threshold
current; the total RMS modulation index is
In the whole pump power range from laser threshold
to the maximum pump power, we did not observe the self-pulsed phenomenon.
It is find in a multichannel system when a laser outputs nearly zero power as the input signal current to the laser drives below the laser threshold
current [I.sub.th] (Fig.1), .