Guo Changlei, Che Kaijun, Zhang Pan, Wu Jinshu, Huang Yantang, Xu Huiying, Cai Zhiping
Opt Express. 2015 Dec 14;23(25):32261-6. doi: 10.1364/OE.23.032261.
We demonstrate the first observation of stimulated Brillouin scattering (SBS) in a high-Q whispering gallery mode tellurite microsphere. Tellurite glass with composition of 70TeO₂-20ZnO-5Na₂O-5La₂O₃ (molar ratio) was prepared in-house using a melt-quenching technique. Moreover, tellurite microspheres with Q in excess of 13 millions at 1550 nm were fabricated by melting tellurite microwires using a CO₂ laser. By pumping the tellurite microspheres with a tunable single frequency laser, SBS is further realized with a threshold as low as 0.58 mW. At last, the beat notes between the pump and the Stokes signals were measured, which indicated the Brillouin frequency shift is at the 8.2 GHz band for our tellurite glass. Our results could propel significant applications utilizing SBS by employing tellurite microspheres.
我们首次展示了在高Q回音壁模式碲酸盐微球中观察到受激布里渊散射（SBS）。采用熔体淬火技术在内部制备了组成为70TeO₂-20ZnO-5Na₂O-5La₂O₃（摩尔比）的碲酸盐玻璃。此外，通过使用二氧化碳激光熔化碲酸盐微丝，制备了在1550 nm处Q值超过1300万的碲酸盐微球。通过用可调谐单频激光泵浦碲酸盐微球，进一步实现了阈值低至0.58 mW的受激布里渊散射。最后，测量了泵浦信号和斯托克斯信号之间的拍频，这表明我们的碲酸盐玻璃的布里渊频移在8.2 GHz频段。我们的结果可能会推动利用碲酸盐微球进行受激布里渊散射的重要应用。
