Patent Number: 6,252,711

Title: Polarization diversity for birefingent filters

Abstract: A birefringent filter includes an input optical apparatus for receiving an input optical beam and producing therefrom parallel first and second optical beams offset in a first direction and having the same polarization. A birefringent filter unit receives the first and second polarized optical beams and produces a first and second elliptically polarized optical beams. An output optical apparatus combines predetermined components of the first and second elliptically polarized optical beams to form a first and second elliptical polarized output beams. The two output beams have intensities that vary inversely, in a periodic manner, as a function of frequency of the input optical beam.

Inventors: Damask; Jay N. (Annapolis, MD), Doerr; Christopher Richard (Middletown Township, NJ)

Assignee: Lucent Technologies, Inc

International Classification: G02B 27/28 (20060101); G02B 6/34 (20060101); H04J 14/02 (20060101); G02B 027/28 (); H04J 014/00 ()

Expiration Date: 06/26/2018