Fig. 1: Brillouin-DKS generation in a microresonator-filtered laser.
From: Turnkey photonic flywheel in a microresonator-filtered laser
a Left: Schematic of the microresonator-filtered laser that consists of a ~10-GHz multimode fiber (MMF) FP microresonator nested in a single-mode fiber (SMF) ring laser cavity. EDFA Erbium-doped fiber amplifier, CIR circulator, CLR collimator, FL focusing lens, CL collimating lens, HWP half-wave plate, PBS polarization beam splitter, BPF band-pass filter, PC polarization controller. Right: spectra and beam profiles from PBS Port 1 and Port2. λ: wavelength. b Photographs of the MMF FP microresonator. c Frequency-calibrated transmission spectra of the pump mode showing the microresonator linewidth of 695 kHz. d Optical spectrum output from PBS Port 1, including the Brillouin mode and leaked weak-intensity pump mode. e Radio frequency (RF) beat note of the stimulated Brillouin scattering (SBS) frequency shift at 10.347 GHz.
