Fig. 3 | Communications Physics

Fig. 3

From: Two-micron all-fibered dual-comb spectrometer based on electro-optic modulators and wavelength conversion

Fig. 3

Experimental all-fibered setup for DCS around 2 μm. A dual comb at 1.57 μm (Comb 1 and Comb 2) is generated with EOMs and converted around 2 μm by stimulated 4MI taking place in an HNLF using a CW laser at 1.31 μm. After conversion, the 2 μm dual comb is amplified in a TDFA and filtered. At the output of the filter, 10% of the dual-comb beam serves as a reference channel, whereas the rest is directed toward a cell for spectroscopic applications. The signal is then electronically acquired by a detector to reveal a comb in the radio frequency domain. WDM wavelength division multiplexer

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