Patent Number: 6,298,177

Title: Phase modulator for semiconductor waveguide

Abstract: An optical phase modulator comprises a semiconductor rib wave guide having P and N doped regions forming a PN junction along the path of the rib with terminals for applying a reverse bias to the junction to extend a carrier depletion zone to alter the refractive index, the PN junction is offset from the central axis of the rib but on application of the reverse bias the depletion zone extends over a central axis of the waveguide.

Inventors: House; Andrew Alan (Summertown, GB)

Assignee: Bookham Technology PLC

International Classification: G02F 1/01 (20060101); G02F 1/025 (20060101); G02B 001/035 ()

Expiration Date: 10/02/2018