%0 Journal Article %T Phase locking of a second harmonic gyrotron using a quasi-optical circulator %A Hoppe, Daniel J. %A Guo, Hezhong Z. %A Tate, Jeffrey P. %J Proceedings of SPIE %V 2557 %N 1 %P 356-366 %@ 0277-786X %D 1995-09-08 %I SPIE %~ DeepDyve