Fig. 1. Schematic plot of the hybrid integrated diode laser.

Fig. 2. Experimental results of the hybrid laser. (a) L-I curve. (b) Measured optical spectrum with the single frequency operation. (c) Recorded RF beat spectrum (red dots). Black line shows a Lorentzian fit corresponding to a laser linewidth of 85 kHz. Inset shows the detail of the spectrum in a sub-MHz range. (d) Superimposed spectra when thermally tuning one of the two microresonators (the tuning range is ∼47  nm).

Fig. 3. (a) Schematic plot of the integrated beam steering hybrid system. (b) Side view and top view of the surface waveguide grating.

Fig. 4. Experimental results of the beam steering system with the hybrid integrated diode laser based on the quantum-dot RSOA. Inset: far-field IR image of the emission from the surface grating.

Fig. 5. Schematic plot of the integrated beam steering hybrid system with the triple-band diode laser.

Fig. 6. Experimental results of the beam steering system with the hybrid integrated triple-band diode laser. The periods of gratings A, B, and C are 632, 805, and 931 nm, respectively.

Fig. 7. Experimental results of the beam steering system with the hybrid integrated diode laser. The periods of gratings A, B, and C are the same.