Arrangement for controlling or regulating an emission wavelength and emitted power of a semiconductor laser

US4815081A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans Mahlein · Unterhaching, DE
• Reinhard Maerz · Munich, DE
• Meinrad Schienle · Ottobrunn, DE

Key dates

• Filing date: Mar 23, 1988
• Grant date: Mar 21, 1989
• Expiry date: Mar 23, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/0264
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An arrangement for controlling or regulating the emission wavelength and emitted optical power of a semiconductor laser is provided in optically integrated fashion. The optical power of the laser is at least partially supplied to an optical detector device and to a wavelength selective optical filter device. That part of the supplied power which passes through the filter device is conducted to another opto-electrical detector device. As a result of the two diodes, the optical power and the emission wavelength of the laser are simultaneously measured, whereby two control signals for the injection current of the laser are obtained.