Integrated optical waveguide having a filter

US4006964A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans Mahlein · Unterhaching, DE
• Gerhard Winzer · Munich, DE

Key dates

• Filing date: Aug 15, 1975
• Grant date: Feb 8, 1977
• Expiry date: Aug 15, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/126
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An integrated optical waveguide has a first waveguide portion with a tapered terminus which directs the light carried therein into a multiple, high-and low-refractive layered filter system for spectrum or polarization filtration. A second optical waveguide portion has a tapered origin spaced closely adjacent the tapered terminus of the first portion on the topmost filter layer to pick up and transmit light from the filter. Effective indices of refraction of the integrated waveguides are greater than the index of refraction of the adjoining topmost layer of the filter for wave lengths of desired light.