A Faraday Laser Lasing On Rb 1529 Nm Transition Used For Optical Communication Wavelength Standard

The semiconductor lasers today have the advantages of small size,light weight,longevity,energy-efficiency,tunability.However,the free-running semiconductor lasers without feedback have several negative features,including frequency long-term drift,wideband,frequency susceptibility to laser diode(LD)temperature and driving current,etc.In this paper,we successfully demonstrated a Faraday laser directly lasing on the Rb 1529 nm transition by utilizing a performance-improved electrodeless discharge lamp-based Faraday anomalous dispersion optical filter(LESFADOF),instead of a frequency-locked pump laser.This new Faraday laser has a better wavelength stability compared to the traditional grating,interference filter semiconductor laser and fiber laser.It has been successfully solved the problem that the indispensability of an additional frequency-stabilized pump laser in conventional 1529 nm optical wavelength standards,and the volume and cost are significantly compressed.Because of its small volume and simple structure and immunity to wide range current and temperature changes,the rubidium 1529 nm Faraday laser have important application significance in scientific research and engineering.This paper first introduces the principle and experimental data of Faraday anomalous dispersion atomic filter based on rubidium atomic discharge lamp,and then introduces the optimized filtering effect at 1529 nm transition frequency,and the relationship between transmission spectrum of atomic filter and various experimental conditions.On the basis of above,the 1529 nm Faraday laser of rubidium atom is achieved by external cavity feedback technology.The Faraday laser works stably over a wide range the temperature of laser diode and driving current,as?well?as?the 24-hour?long-term frequency?fluctuation range?of?no?more?than?600?MHz.?The?laser?linewidth?and?relative?intensity?noisy(RIN)?are?me asured.?Finally,hence a fiber-based Faraday laser can be used as a stable laser source for practical applications.The next step in this study is to use fiber to increase the length of the cavity,reduce the frequency fluctuation of the laser and further improve the frequency stability of the Faraday laser.