Quiet broadband light

Hugues Guillet de Chatellus 1 O Jacquin 1 O Hugon 1 E Lacot 1
1 LIPhy-OPTIMA
LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]
Abstract : The interference of waves evenly separated in frequency generates a periodic signal, whose intensity fluctuations depend on the phases of the individual waves. A fundamental question in telecommunications and acoustics is the minimization of the peak-to-average-power ratio (PAR): for a given spectrum, how to arrange the phases of the individual frequency components to ensure minimal intensity fluctuations of the resulting signal? For a flat spectrum a near-optimal solution is brought by the so-called Newman phases, commonly used in acoustic and radio waves. Here we transpose this property into the optical domain and prove the possibility to suppress the intensity fluctuations resulting from intermodal beating of a broadband comb of optical frequencies, whose phases are set according to a generalization of the Newman phases. We demonstrate experimentally a broadband laser, whose intensity contrast (defined as the standard deviation-to-mean ratio) is reduced down to 0.54 as compared to 1 when the phases are set randomly.
Document type :
Journal articles
Complete list of metadatas

Cited literature [22 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01102193
Contributor : Sylvie Costrel de Corainville <>
Submitted on : Monday, January 12, 2015 - 4:14:40 PM
Last modification on : Tuesday, September 11, 2018 - 9:24:02 AM
Long-term archiving on : Monday, April 13, 2015 - 10:35:44 AM

File

quiet broadband light.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Hugues Guillet de Chatellus, O Jacquin, O Hugon, E Lacot. Quiet broadband light. Physical Review Online Archive (PROLA), American Physical Society, 2014, 90, pp.1050-2947/2014/90(3)/033810(6). ⟨10.1103/PhysRevA.90.033810⟩. ⟨hal-01102193⟩

Share

Metrics

Record views

201

Files downloads

130