Dual-Comb Spectroscopy (DCS) is a novel high-performance spectral measurement technology. However, conventional DCS systems often rely on optical frequency comb seed sources, which have limited output power and are not capable of withstanding the substantial losses encountered during on-site detection. Additionally, their spectral range is often narrow and may not be suitable for the target gases. In this work, we demonstrate a high-power, wide-spectral-range dual-comb spectroscopy measurement system for on-site spectral detection. The system comprises two optical frequency combs with close repetition rates, utilizing erbium-doped fiber amplifiers and dispersion compensating fibers for power amplification and broadening of the spectrum. We successfully detect absorption spectra of multiple gases, demonstrating good agreement with the simulated spectrum from the HITRAN standard database. The spectral resolution can reach sub-picometer-level (approximately 0.45 pm). This work shows the potential of dual-comb spectroscopy technology transitioning from laboratory research to industrial on-site applications.
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