9KUROSAWA K,YOSHIDA S,MORI E,et al. Development of an optical instrument transformer for DC voltage measurement[J]. IEEE Trans. on Power Delivery,1993,8(4): 1721-1726.
10FABINY L,VOHRA S T,BUCHOLTZ F. High-resolution fiber-optic low-frequency voltage sensor based on the electrostrictive effect[J]. IEEE Photonics Technology Letters, 1993,5(8): 952-953.