Spectral beam combiner with independent wavelength stabilization

US11848541B2 · kind B2 · utility

Assignee

• II-VI DELAWARE, INC. · US

Inventors

• Haro Fritsche · Berlin, DE
• Andreas Grohe · Glückstadt, DE

Key dates

• Filing date: Dec 15, 2020
• Grant date: Dec 19, 2023
• Expiry date: Jan 16, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/0816
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A spectral beam combiner is based upon a specialized diffraction grating that is intentionally configured to create output signals along two separate paths, each path supporting a spectrally-combined beam. One path supports the propagation of a majority of the spectrally-combined beam (e.g., 80-95%) and is defined as the output path from the beam combiner. The remainder of the spectrally-combined beam is directed along a separate path and into an external cavity arrangement used to perform wavelength stabilization. Either reflective or transmissive diffraction gratings may be used, with different diffraction orders and/or polarization states of the spectrally-combined optical beam used to create the output beam and the separate wavelength stabilization feedback beam.