Top contact VCSEL with monitor

US6368890B1 · kind B1 · utility

Assignee

• Mitel Semiconductor AB · CA

Inventors

• Mikael Wickstrom · Järfälla, SE
• Jan Jonsson · Järfälla, SE
• Vilhelm Oskarsson · Järfälla, SE

Key dates

• Filing date: Feb 18, 2000
• Grant date: Apr 9, 2002
• Expiry date: Feb 18, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/183
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A vertical cavity surface emitting laser (VCSEL) and monitoring diode combination having reduced parasitic capacitance for use in high bandwidth communications systems. The VCSEL has both p-type and n-type contacts on the same face. This allows the VCSEL to be mounted on a monitor chip or diode without using a metal contact layer. In an embodiment wherein the VCSEL is soldered to the monitor chip for mechanical stability only a small metal pad no larger than the VCSEL is used. The reduction in metallization results in a lower parasitic capacitance that in turn results in higher potential operational speeds