The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2026
Filed:
Feb. 13, 2024
Quintessent Inc., Goleta, CA (US);
Szilard Szoke, Los Angeles, CA (US);
QUINTESSENT INC., Goleta, CA (US);
Abstract
The teachings of the present disclosure enable wavelength-agile WDM systems comprising wavelength drop ports based on contra-DC wavelength filters, where back-reflections at each drop port are mitigated by virtue of the system architecture. The contra-DC filters are arranged in a series along a common bus waveguide such that the operating wavelengths of the filters change in monotonic fashion through the series. As a result, back-reflections arising at each filter is suppressed by the contra-DC filter that precedes it in the series. In some embodiments, each contra-DC filter is configured such that its filter bandwidth is large enough to accommodate both its drop signal and back-reflections arising from the grating element of the preceding contra-DC filter in the series. In some embodiments, conventional back-reflection approaches are used in concert with the system-architecture approach of the present disclosure.