Shaping the spectrum of a down-converted mid-infrared frequency comb

G. Campo*, A. Leshem, F. Cappelli, I. Galli, P. Cancio Pastor, A. Arie, P. D.E. Natale, D. Mazzotti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


New methods to frequency down-convert a broadband near infrared frequency comb into the mid-infrared by three-wave mixing are studied. Modulation of the second-order nonlinear coefficient based on the concepts of either nonlinear spectral holography or quasi-periodic modulation enables us to obtain different spectral shapes of the mid-infrared comb. It includes flat and broadband single-band or dual-band spectra, or a shape that exhibits two or even three sharp peaks at chosen frequencies. The methods we present can be used to tailor the frequency comb spectra to selected molecular absorption lines in the mid-infrared.

Original languageEnglish
Pages (from-to)2287-2294
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Issue number11
StatePublished - 1 Nov 2017


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