Patent · US Active

Highly efficient, single-pass, harmonic generator with round output beam

US9912114B2 · kind B2 · utility

2Cited by

9References

11Claims

0Family size

Assignee

IPG PHOTONICS CORPORATION · US

Inventors

Manuel J. Leonardo · San Francisco, US
Mark Alan Arbore · Palo Alto, US
Gregory L. Keaton · San Francisco, US

Key dates

Filing date	Mar 13, 2014
Grant date	Mar 6, 2018
Priority date	—
Expiry date	Oct 29, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH01S3/1666
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An extra cavity harmonic generator system may produce a round, non-astigmatic third harmonic output beam from a nominally round, non-astigmatic, diffraction limited input fundamental beam. The system may include a second harmonic generation crystal. An input fundamental beam size is expanded in a non-walkoff direction for the SHG crystal at the SHG crystal input face. A higher harmonic generation crystal has an output face oriented at an oblique angle of incidence in a non-walkoff direction for the HHG crystal such that an output higher harmonic beam size is contracted in this direction. Expansion of the input fundamental beam at the SHG crystal input face exceeds reduction of third harmonic beam at the HHG crystal output face.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.