Patent · US Expired

Low relative intensity noise fiber grating type laser diode

US7158552B2 · kind B2 · utility

5Cited by

3References

27Claims

0Family size

Assignee

LUCENT TECHNOLOGIES INC. · US

Inventors

Bianca Buchold · Nuremberg, DE
Konrad Czotscher · Nuremberg, DE
Dieter Werner · Fairview Avenue, DE

Key dates

Filing date	Feb 13, 2004
Grant date	Jan 2, 2007
Priority date	—
Expiry date	Nov 11, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH01S2301/02
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

The dependency of intensity noise is used to determine the wavelength difference between a laser diode gain peak and a reflection peak of a fiber grating in a fiber grating type laser diode. Monitoring and determining the relative noise intensity of such a laser enables the control of the laser diode or the fiber grating such that the intensity noise is as low as possible. Such an approach enables the use of a fiber grating type laser diode as Raman pumps in high-speed transmission systems where low intensity noise is a requirement, especially when the Raman pump power propagates in the same direction as the transmission signals (known as Raman co-pumps).

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