Patent · US Expired

Laser transmitter including an external optical resonator

US4799234A · kind A · utility

5Cited by

3References

5Claims

0Family size

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	Sep 14, 1987
Grant date	Jan 17, 1989
Priority date	—
Expiry date	Sep 14, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/4203
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A narrow-band laser transmitter including a semiconductor laser and an external optical resonator in the form of a wavelength-selective fiber directional coupler. A partially reflecting feedback device is provided so that output power of the transmitter can be taken from the resonator. The frequency selective fiber directional coupler is formed by a dispersive double core fiber and the feedback device is supplied with radiant laser energy that is coupled over from one core into the other core and that portion of the radiant energy which has been coupled over is allowed to pass as output power of the transmitter by the feedback device.

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