Experimental Analysis of laser Dynamics in Single Mode FP-LD Subjected to Dual-Beam Injection

Abstract

The dynamics of dual-beam injection into single mode FP-LD are analyzed. With the wavelength of injected beams unchanged and injection strength changed, the dynamics are observed and determined as scenario A, B or C.

Nonlinear Dynamics and Potential Application of a DFB Laser Subject to Dual-Beam Injection

“…This is different to the simulated dual-beam optically injected semiconductor laser output optical spectrum presented in [10], which shows the output of a dual-beam optically injected semiconductor laser oscillating in the P1 state consists of the two regenerated injection beams with no frequency component between the two beams. This laser nonlinear dynamical characteristic was observed experimentally in [13] and [14] where the frequency separation of the two injection beams is 13.5 GHz and 9.5 GHz respectively, which are much smaller than the injection beam frequency separation of 70 GHz shown in Fig. 2.…”

“…Investigation on the behaviour of the DFB laser subject to dual-beam injection was conducted by changing the DFB laser forward bias current. This is different to the previous works [12]- [14] and has the advantage of being a simple way to conduct an experimental investigation. However, the relaxation oscillation frequency of the DFB DFB Laser (SL) Tunable Laser Photodetector laser and the detuning frequency change in a nonlinear way with the DFB laser forward bias current.…”

“…The power of the injection light wave remained at around -3 dBm. P1 dynamic of the SL described in [10], [13], [14] was observed and is shown by the blue line in Fig. 7(a), when the SL forward bias current is 13 mA.…”

“…This consequently alters both the detuning frequencies (fi1, fi2) and the injection strengths (1, 2). This is different to [10], [13], [14] where the laser nonlinear dynamics were investigated by changing the injection strengths while fixing the detuning frequencies. Also note from the figure that the SL free running frequency is within the frequency range of the two injection beams.…”

“…Injecting two different-frequency CW light into a semiconductor laser enriches the laser nonlinear dynamics. Theoretical [10], [11] and experimental [12]- [14] investigations on the nonlinear dynamics of a semiconductor laser subject to dual-beam injection have been reported. Several dual-beam optically injected semiconductor laser based microwave photonic signal processors, e.g.…”