The low-frequency tail of an octave-spanning supercontinuum (SC) generated by an Er:fiber comb is enhanced by a multipass Ho:YLF amplifier and used in a sum-frequency-generation scheme to obtain absolute referencing of a single-mode Tm-Ho:YAG laser tunable around 2.09 um. By tuning the comb repetition frequency, the probing laser is scanned across the absorption lines of a CO2 gas sample and highly accurate absorption profiles are measured. This approach can be readily scaled to any wavelength above 2¼m
Absolute frequency spectroscopy of CO2 lines at around 2.09 mu m by combined use of an Er:fiber comb and a Ho:YLF amplifier
N Coluccelli;A Di Lieto;M Tonelli;P Laporta;
2011
Abstract
The low-frequency tail of an octave-spanning supercontinuum (SC) generated by an Er:fiber comb is enhanced by a multipass Ho:YLF amplifier and used in a sum-frequency-generation scheme to obtain absolute referencing of a single-mode Tm-Ho:YAG laser tunable around 2.09 um. By tuning the comb repetition frequency, the probing laser is scanned across the absorption lines of a CO2 gas sample and highly accurate absorption profiles are measured. This approach can be readily scaled to any wavelength above 2¼mFile in questo prodotto:
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