Combining and collimation of RGB laser beams with transmissive resonance domain diffractive optics

Omri Barlev, Michael A. Golub

Research output: Contribution to journalArticlepeer-review

Abstract

Resonance domain diffractive optical elements for combining RGB laser beams into a single collimated beam were designed, fabricated, and experimentally investigated. The input RGB beams were angular separated up to tens of degrees and set in a nearly Bragg arrangement for high diffraction efficiency. A single resonance domain diffractive lens delivered beam combining and collimation functions with reasonable residue divergence. The resonance domain diffraction grating delivered diffraction-limited residue divergence in combining the collimated RGB beams. Optical experiments with fiber-coupled RGB lasers and e-beam-fabricated beam combiners proved low residue beam divergence, a high polarization extinction ratio, and total measured diffraction efficiency of about 80%.

Original languageEnglish
Pages (from-to)6742-6749
Number of pages8
JournalApplied Optics
Volume57
Issue number23
DOIs
StatePublished - 10 Aug 2018

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