Open AccessLatest advances in optical frequency combs based on quadratic non‐linearity
Author(s) -
Mariana Barturen,
Benjamin Maglio,
Pablo Alejandro Costanzo Caso
Publication year - 2020
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2019.0078
Subject(s) - quadratic equation , linearity , power (physics) , wavelength , footprint , harmonic , optics , span (engineering) , power consumption , frequency conversion , electronic engineering , computer science , physics , electrical engineering , mathematics , engineering , acoustics , geometry , civil engineering , quantum mechanics , paleontology , biology
Second‐order non‐linear susceptibility ( χ 2 ) is the cause of many non‐linear processes in optics including second harmonic generation, sum frequency generation and difference frequency generation. Optical frequency combs based on χ 2 , i.e. quadratic frequency combs, hold the promise of reducing the devices power consumption and footprint since χ 2 materials present a stronger non‐linearity than χ 3 materials, which suggests that higher efficiencies can be achieved. In this work, we will revisit the latest quadratic combs experimental advances, concerning power threshold, span and wavelength conversion efficiency.