Zhang, YaBandutunga, ChathuraMcRae, TerryGray, MalcolmChow, Jong2023-05-302023-05-301094-4087http://hdl.handle.net/1885/292228We demonstrate a passive, all-optical fiber frequency reference using a digitally enhanced homodyne interferometric phase readout. We model the noise contributions from fiber thermal noise and the coupling of double Rayleigh scattering in a digitally enhanced homodyne interferometer. A system frequency stability of 0.1 Hz/root Hz is achieved above 100 Hz, which coincides with the double Rayleigh scattering estimate and is approximately a factor of five above the thermo-dynamic noise limit.application/pdfen-AU© 2021 Optical Society of America under the terms of the OSA Open Access Publishing AgreementDouble Rayleigh scattering in a digitally enhanced, all-fiber optical frequency reference202110.1364/OE.4331102022-03-27OSA Open Access Publishing Agreement