High resolution heterodyne interferometer without detectable periodic nonlinearity Joo, Ki-Nam ; Ellis, Jonathan D. ; Buice, Eric S. ; Spronck, Jo W. ; Schmidt, Robert H. Munnig Abstract Publication: Optics Express Pub Date: January 2010 DOI: 10.1364/OE.18.001159 Bibcode: 2010OExpr..18.1159J