Fiber distributed feedback laser

US3958188A · kind A · utility

Inventors

• James C. Administrator of the National Aeronautics and Space Fletcher
• Charles Elachi · Pasadena, US
• Gary A. Evans · Plano, US
• Cavour Yeh · Los Angeles, US

Key dates

• Filing date: Dec 11, 1974
• Grant date: May 18, 1976
• Expiry date: Dec 11, 1994

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/06704
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Utilizing round optical fibers as communication channels in optical communication networks presents the problem of obtaining a high efficiency coupling between the optical fiber and the laser. A laser is made an integral part of the optical fiber channel by either diffusing active material into the optical fiber or surrounding the optical fiber with the active material. Oscillation within the active medium to produce lasing action is established by grating the optical fiber so that distributed feedback occurs.