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. 2005 Jun 1;30(11):1342-4.
doi: 10.1364/ol.30.001342.

Spectrally narrowed external-cavity high-power stack of laser diode arrays

H Zhu  1 , I C Ruset, F W Hersman
Affiliations

Spectrally narrowed external-cavity high-power stack of laser diode arrays

H Zhu et al. Opt Lett. .

Abstract

We describe an effective external cavity for narrowing the spectral linewidth of a multiarray stack of laser diode arrays. For a commercially available 279-W free-running five-array laser diode array operating at 60 A, we narrow the spectral linewidth to 0.40 nm at FWHM with 115 W of cw power output. This technique leads to the possibility of higher-efficiency, lower-cost production of hyperpolarized noble gases for magnetic resonance imaging.

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Figures

Fig. 1
Fig. 1
Schematic of the LDA stack external-cavity arrangement with selected rays.
Fig. 2
Fig. 2
Comparison between free-running and spectrally narrowed LDA stack external-cavity laser linewidths.
Fig. 3
Fig. 3
Spectral linewidth for each LDA and all five LDAs combined.
Fig. 4
Fig. 4
Photograph showing smiles of PA-332 LDA stack arrays 1–5, left to right, on a 0.5-cm grid graph paper.
Fig. 5
Fig. 5
External-cavity tuning range and the spectral power of the narrowed laser beam.
See this image and copyright information in PMC

References

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