Patent · US Expired

Arrangement for operating a laser diode

US5185643A · kind A · utility

39Cited by

1References

10Claims

0Family size

Assignee

Carl Zeiss Stiftung · DE

Inventors

Uwe Vry · Aalen, DE
Andreas Dorsel · Menlo Park, US
Berthold Schierle · Bopfingen, DE
Martin Blumentritt · Königsbronn, DE
Peter Greve · Eindhoven, NL

Key dates

Filing date	Dec 9, 1991
Grant date	Feb 9, 1993
Priority date	—
Expiry date	Dec 9, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/06837
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention is directed to an arrangement for operating a laser diode. A two-stage stabilization circuit is provided for stabilizing the wavelength of a laser diode to exactly defined values for its use in distance measuring interferometers. In addition to presetting the operating parameters of current and temperature of the laser diode, the emitted wavelength of the laser diode is controlled to a predetermined transmission maximum of a Fabry-Perot interferometer. At switch-on, a control program can be called up and compute new values for the operating parameters premised on the last measured values of the operating parameters and initially determined and stored coefficients. In this way, the program always reliably sets the wavelength of the laser diode to the same transmission maximum.

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