Generation of coherent mid-IR light by parametric four-wave mixing in alkali vapor

Yoel Sebbag, Yefim Barash, Uriel Levy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


The parametric four-wave mixing (4WM) process responsible for the generation of coherent blue light in alkali vapors is a self-seeded process which starts by population inversion and amplified spontaneous emission (ASE). Lately, attention has been turned toward frequency up- and down-conversion in alkali vapors, using relatively low pump powers with CW diode lasers. In this Letter, we investigate the interplay between ASE and 4WM in rubidium (Rb) vapors by studying the mid-infrared (mid-IR) radiation emitted in the forward direction at 5.23 μm. We show that the ASE can be suppressed by 4WM in the CW regime. Thus, we demonstrate the generation of coherent mid-IR light at 5.23 μm in hot Rb vapors via parametric 4WM.

Original languageAmerican English
Pages (from-to)971-974
Number of pages4
JournalOptics Letters
Issue number4
StatePublished - 15 Feb 2019

Bibliographical note

Funding Information:
Israel Science Foundation (ISF). The research in this Letter was supported by the Israeli Science Foundation (ISF). Yoel Sebbag acknowledges a fellowship from the Hebrew University Center for Nanoscience and Nanotechnology.

Publisher Copyright:
© 2019 Optical Society of America.


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