Carbon nanotube-synchronized dual-color fiber laser for coherent anti-Stokes Raman scattering microscopy

Optics Letters
Yan LiChangxi Yang

Abstract

In this Letter, we present a passively synchronized dual-color fiber laser at 1.03 and 1.53 µm for coherent anti-Stokes Raman scattering (CARS) microscopy. This fiber laser consists of both Yb- and Er-doped laser cavities, combined by an ∼1.2m common branch with a single-walled carbon-nanotube-based saturable absorber. Stable passively synchronized mode-locked state is obtained within a total cavity length mismatch of 50 µm. We demonstrate the capability of the synchronized dual-color fiber laser for CARS spectroscopy in both low- and high-wavenumber regions, with a resolution of 6.6cm-1. Furthermore, a CARS image in the field of view 150×60µm2 of polystyrene at the Raman shift of 3041cm-1 has also been achieved. The results show the feasibility of our passively synchronized dual-color fiber laser to be employed as a stable and low-cost ultrafast laser source for CARS.

References

Mar 3, 2011·Journal of Biomedical Optics·Sophie BrustleinHervé Rigneault
May 26, 2012·Optics Letters·Simon LefrancoisFrank W Wise
Oct 15, 2014·Nature Photonics·Christian W FreudigerKhanh Q Kieu
Apr 3, 2020·Optics Letters·Kangjun ZhaoChangxi Yang

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