Patent · US Expired

Tunable add/drop filter

US6795654B2 · kind B2 · utility

4Cited by
13References
23Claims
0Family size

Inventor

Key dates

Filing dateSep 18, 2001
Grant dateSep 21, 2004
Priority date—
Expiry dateMay 22, 2023

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B6/29395
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A precise, tunable, low loss add/drop filter for use in fiber optic communication systems utilizes a cascaded system of Mach Zender-like stages, along with reflective elements to return passed channels to the output pass+add signal while transmitted signal(s) appear at the drop port. The optional add signal follows the reverse path of the drop signal and is added to the pass signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.