Patent · US Expired

Self-adjustable tunable filter

US7136590B2 · kind B2 · utility

0Cited by

4References

11Claims

0Family size

Assignee

AGILENT TECHNOLOGIES, INC. · US

Inventors

Ulrich Kallmann · Lörrach, DE
Wolf Steffens · Herrenberg, DE

Key dates

Filing date	Aug 21, 2002
Grant date	Nov 14, 2006
Priority date	—
Expiry date	Aug 4, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/5045
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A system for matching a optical filter characteristic of a first filter tunable in wavelength with an optical first signal comprises a modulator for modulating at least a part of the first signal with a modulation signal before being applied to the first filter. An analyzing unit derives a control signal for tuning the first filter by analyzing the modulated first signal after passing the first filter in conjunction with the modulation signal.

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