Dc. Lin et al., MEASURING THE INTRINSIC FREQUENCY-RESPONSE OF A DFB LASER-DIODE USINGAN ALL-FIBER-CONNECTED OPTICAL MODULATION TECHNIQUE, Electronics Letters, 29(13), 1993, pp. 1223-1225
The modulated optical pump signal was boosted by an Er3+-doped fiber a
mplifier and was efficiently injected into the cavity of the probed la
ser diode by means of a fibre polarisation controller incorporated wit
h a 2 x 2 fibre coupler. By keeping the pump wavelength a few nanometr
es away from the lasing wavelength of the probed DFB laser, the measur
ed results are just the parasitic-free frequency response of the probe
d DFB laser.