title: Four waveplate dual tuner for birefringent filters and multiplexers.
abstract: A Solc-type birefringent filter with five crystal elements in a wavelength multiplexer configuration is tuned with a minimum number of waveplates by means of a new four waveplate dual tuner that adds equal retardations to two elements simultaneously.
authors.forename: C F
authors.initials: CF
authors.lastname: Buhrer