Patent · US Expired

Circuit arrangement for limiting the power of the optical signal emitted by a laser diode

US5394419A · kind A · utility

2Cited by

2References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Klaus Neuhaus · Wuppertal, DE
Klaus Panzer · Regensburg, DE
Michael Stockmann · Munich, DE

Key dates

Filing date	Jan 21, 1994
Grant date	Feb 28, 1995
Priority date	—
Expiry date	Jan 21, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/06804
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In a circuit arrangement for limiting the power of the optical signal emitted by a laser, the current through the laser is supplied via a parallel connection of a plurality of series circuits of a transistor with a resistor. In addition, provision is made for a limitation, depending on the operating temperature of the laser, of the maximum current through the laser, which is realized by means of a temperature-dependent control signal fed to the control electrodes of the transistors.

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