title: Phase measurement in frequency-doubling fibers.
abstract: Fibers were prepared for second-harmonic generation by injecting a frequency-doubled (seed) signal with the fundamental light from a Nd:YAG laser. The relative phase shift between the seed and the second-harmonic light generated by the fiber was measured to be close to 90 degrees ( approximately 99 +/- 9.2 degrees ). A water cell was used to sweep the relative phase of the waves with interferometric precision. Some physical consequences of a pi/2 phase shift are pointed out.
authors.forename: W
authors.initials: W
authors.lastname: Margulis
authors.forename: I C
authors.initials: IC
authors.lastname: Carvalho
authors.forename: J P
authors.initials: JP
authors.lastname: von der Weid