Fig. 5: SBS lasing at 698 nm.
a Multi-physics simulation of waveguide spontaneous Brillouin gain spectra for pump at 698 nm. Brillouin gain spectrum width of ~300 MHz and Stoke frequency shift of 24.243 GHz. b The measured full width half maximum (FWHM) resonator linewidth at 698 nm is 12.7 MHz and the measured intrinsic and loaded Qs are 60 million and 33.8 million respectively. c The resonator free-spectral range (FSR) at 698 nm is measured to be 3.421 GHz by applying sidebands at 1.4645 GHz. d First order Stokes (S1) and the pump measured on an optical spectrum analyzer (OSA), with inset showing the pump-S1 beat note measured at 23.892 GHz on an electric spectrum analyzer (ESA). Inset on left shows the 9.4 mm radius resonator fiber-coupled with 698 nm pump laser light.
