Active resonators based on optical waveguides can significantly enhance the performance of optical gyroscope due to its loss compensation effect. The spontaneous emission noise (SEN) stemmed from optical gain will broaden the linewidth of the resonator and limit the sensitivity and resolution of active resonator optical gyroscope (AROG). In this paper, we modified the sensitivity formula when the spontaneous emission noise is dominant and analyzed theoretically the performance limitations of the AROG. After considering the spontaneous emission noise source, the resolution can be improved through optimizing the design parameters of the AROG
40P2O5-20Al2O3-(30-x)Na2O-10BaO-xEr2O3 (PANB) glasses with different Er3+ concentrations were fabricated by the traditional melt quenching method and their spectroscopic properties were investigated. Glass thermal stability is investigated by differential scanning calorimetry (DSC) (Tx-Tg=138°C) which indicates a better recrystallization performance than that of fluorophosphates glass and fluorotellurite glass. The derived Judd-Ofelt intensity parameters of Er3+ doped PANB glass (Ω2=18.8, Ω4=15.9, Ω6=5.38(×10-20cm2 )) indicate higher asymmetry and stronger covalent environment when compared with Er3+ doped tellurite, fluoride and fluorotellurite glasses. Compared with Er3+ transitions in other glass hosts, large stimulated emission cross-section and broad full wave at half maximum (FWHM) were found to be 4.58×10-20cm2 and 60 nm centered at ∼1550 nm, respectively. It implies a potential material for infrared lasers and amplifiers.
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