Patent · US Active

Methods to reduce polarization dependent loss in planar lightwave circuits

US7577324B2 · kind B2 · utility

3Cited by
6References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 29, 2008
Grant dateAug 18, 2009
Priority date—
Expiry dateJul 29, 2028

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B6/2793
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Polarization dependent loss may be reduced by providing at least one dummy waveguide or at least one dummy metal structure. Polarization dependent loss may also be reduced by imposing a mechanical force on the OIC to exert mechanical stress thereby changing at least one of the birefringence and the optical axes of at least one waveguide. And polarization dependent loss may be reduced by forming a metal heater using a first set of metal deposition parameters; forming a conductive metal structure contacting the metal heater using a second set of metal deposition parameters; and selecting the first set of metal deposition parameters and the second set of metal deposition parameters to reduce stress.

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