Light transmitting modules with optical power monitoring

US7467897B2 · kind B2 · utility

Assignee

• Hymite A/S · DK

Inventors

• Ralf Hauffe · Berlin, DE
• Arnd Kilian · Berlin, DE

Key dates

• Filing date: Dec 4, 2006
• Grant date: Dec 23, 2008
• Expiry date: Dec 4, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/856
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical module, such as a package for a vertical cavity surface emitting laser diode (VCSEL) or other light emitting device, includes monitoring of the emitted optical power by tapping the transmitted beam. The module includes a substrate, which carries the light emitting device and an optical monitor. In addition, the module includes a transparent plate with at least two reflective regions that together redirect part of the light from the light emitting device to the optical monitor.