Generation of a frequency comb spanning more than 3.6 octaves from ultraviolet to mid infrared

We have observed an ultra-broadband frequency comb with a wavelength range of at least 0.35 to 4.4 μm in a ridge-waveguide-type periodically poled lithium niobate device. The PPLN waveguide is pumped by a 1.0-2.4 μm wide frequency comb with an average power of 120 mW generated using an erbium-based...

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Bibliographic Details
Published in:Optics letters 2016-09, Vol.41 (17), p.3980-3983
Main Authors: Iwakuni, Kana, Okubo, Sho, Tadanaga, Osamu, Inaba, Hajime, Onae, Atsushi, Hong, Feng-Lei, Sasada, Hiroyuki
Format: Article
Language:English
Subjects:
Coherence
Devices
Fiber lasers
Infrared
Lithium niobates
Nonlinearity
Octaves
Wavelengths
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Summary:We have observed an ultra-broadband frequency comb with a wavelength range of at least 0.35 to 4.4 μm in a ridge-waveguide-type periodically poled lithium niobate device. The PPLN waveguide is pumped by a 1.0-2.4 μm wide frequency comb with an average power of 120 mW generated using an erbium-based mode-locked fiber laser and a following highly nonlinear fiber. The coherence of the extended comb is confirmed in both the visible (around 633 nm) and the mid-infrared regions.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.41.003980