Variable polarization independent optical power splitter

US7113279B2 · kind B2 · utility

Assignee

• ACCELINK TECHNOLOGIES CO., LTD. · CN

Inventors

• Wen Liu · Ottawa, CA
• Keyu Wu · 红钢城街道, CN
• Yong Luo · 红钢城街道, CN

Key dates

• Filing date: May 5, 2004
• Grant date: Sep 26, 2006
• Expiry date: Jun 17, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/06
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A variable polarization independent optical power splitter is disclosed. An input light beam “A” is split into two output light beams “M” and “N” where the optical power ratio of the two output light beams “M” and “N” is adjusted to a desired ratio by controlling a variable polarization rotator, e.g. a liquid crystal unit. The polarization components “P” and “S” of the input light beam “A” are separated in a first polarization separator, then processed through the variable polarization rotator, and a second polarization separator. The polarization independence of the power split is thus achieved through the stratagem of processing the “P” and “S” polarized components of the input light beam “A” separately, resulting in four light beams “H”, “I”, “L” and “K”, which are appropriately combined in the polarization combiner to yield the output light beams “M” and “N” having the desired optical power ratio “R”.