Earth rotation measured by a chip-scale ring laser gyroscope

Research advances of ultrahigh-<italic>Q</italic> on-chip microcavity photonics

“…在这期间, 研究人员已经能够成功制备某些片上 超高品质因子光学微腔并用于非线性光学中的实验研 究, 例如在二氧化硅微芯圆环腔和氮化硅微环腔中实 现了受激拉曼散射 [39] 、受激布里渊散射 [40] 、三次谐 波 [41,42] [46,47] (Q>10 8 )、氮化硅微环腔 [48] (Q>10 7 )、III-V族半导体微 环腔 [49] (Q>10 6 )、铌酸锂微盘腔 [50] (Q~10 7 )、氮化铝微 环腔 [51] (Q>10 6 )等. 主要的非线性光学应用包括利用微 腔受激布里渊散射或克尔光频梳产生低噪声相干微波 信号源 [40,52] ; 利用微腔受激散射拉曼散射实现纳米尺 度单颗粒检测 [53,54] ; 利用受激布里渊散射结合Sagnac 效应精确测量地球自转 [55] ; 利用普克尔效应等实现高 速光调制器 [56] ; 利用热光效应、二次合频、四波混频 等效应实现光学隔离器 [57~59] . 此外, 单光子水平的非线 图 3 片上回音壁微腔中典型的非线性光学效应.…”

On-chip Earth spin detection

“…The recent generation of monolithic ultra-low-loss waveguide and centimeter-size chip-based high-Q nonlinear resonators has started to change this situation [7,8,9]. Now writing in Nature Photonics, Vahala and coworkers report an on-chip Brillouin laser gyroscope which provides combined levels of sensitivity and stability that enable measurement of the Earth's rotation rate for the first time in a photonic integrated circuit [10] (See Figure 2a for a conceptual illustration). A clever offset-counter pumping technique and drift compensation method was implemented, enabling better sensitivity to rotation than the last chip [8].…”

Noise Analysis of a Passive Resonant Laser Gyroscope

“…The Sagnac effect is useful in the detention of rotational signals. Instruments based on the Sagnac effect have many applications in different fields [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. In particular, large-scale optical gyroscopes find applications in inertial navigation, geophysical study, seismic isolation, platform stabilization, etc.…”

“…The state-of-the-art interferometric fiber optical gyroscopes can reach a sensitivity of [ 10 , 11 ]. Recently, micro-optical gyroscopes made of whispering gallery mode resonators have attracted much attention and are believed to have great potential to be applied to both industrial and navigational fields [ 12 , 13 ]. On the other hand, a branch of resonant laser gyroscopes has evolved from compact aircraft inertial sensors back into large-scale and complex laboratory setups for applications in the geosciences and fundamental physics in recent decades, with sensitivity as high as [ 4 , 7 , 14 , 15 , 16 ].…”