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A waveguide design that could enable highly precise frequency combs has been created by a research team from the French Centre National de la Recherche Scientifique, Paris-Saclay University, and Zhejiang University. The team’s design produces a graded index waveguide that allows the width of a frequency comb to be more than doubled, compared to a normal waveguide.
Frequency comb generation must balance the material properties that allow light to generate new colors with the behavior of light in the waveguide. This balance is easier to engineer in glass, while for applications and integration with existing devices, silicon is preferred.
To expand frequency comb bandwidth, the researchers focused on the behavior of light…READ MORE