Science Advances

This PDF file includes:

• Section S1. Noise in EOS detection
• Section S2. Noise-equivalent absorption in dual-comb EOS
• Section S3. Atmospheric water vapor in the 585- to 630-cm⁻¹ band
• Fig. S1. EOS response function.
• Fig. S2. Atmospheric water vapor absorption in the 585- to 630-cm⁻¹ band.
• Fig. S3. Phase-matching curves for SFG in GaSe.
• Reference (61)

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