Narrowband laser transmitter having an external resonator from which the output power can be taken

US4873697A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Klaus M. Haeussler · Munich, DE
• Julius Wittmann · Deisenhofen, DE
• Gisela Gaukel · Munich, DE
• Franz Auracher · Munich, DE

Key dates

• Filing date: Jul 23, 1987
• Grant date: Oct 10, 1989
• Expiry date: Jul 23, 2007

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/02251
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A narrowband laser transmitter which has a semiconductor laser and an external optical resonator coupled to the semiconductor laser so that the output power of the transmitter can be taken from the resonator, characterized by the laser transmitter being both a micro-optical realization or implementation as well as executed with a free beam propagation. To this end, the resonator is composed of an optical grating arrangement arranged in the beam path of the laser emission from the semiconductor laser and this optical grating arrangement will conduct one part of the supplied laser emission back to the semiconductor laser while conducting the other or second part of the emission to a coupling location at which the other part can be taken as the output power of the transmitter.