Fig. 1. Schematic representation of the mode hopping effect.

Fig. 2. Scheme of the short-cavity BRL with self-injection locking.

Fig. 3. Double resonance peaks for a cavity length of 5 m.

Fig. 4. Wavelength-locking stabilization scheme.

Fig. 5. Self-heterodyne detection method.

Fig. 6. Short cavity BRL output spectrum.

Fig. 7. Stokes output trace without self-injection (a) and with self-injection (b). Timescale: 50 ms per division.

Fig. 8. Stokes output trace with self-injection and the 37 kHz ECL source as seed pump (200 ms/div timescale) (a) and the 310 kHz dBm source as seed pump (500 ms/div) (b).

Fig. 9. Electrical spectrum of the pump-probe beating for wavelength locked DRC-BRL for averaging times of 10 ms (a) and 120 s (b). The frequency range is centered at the local oscillator frequencies f_LO 10.8602 GHz and 10.8608 respectively. The y axis scale is 1 dB/division (a) and 10 dB/division (b), while the x axis scale is 1 kHz/division (a) and 2 kHz/division (b).

Fig. 10. Comparison of the RIN profiles of the sources.