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We present a new approach for dual-comb optical parametric oscillators. The system uses a single-cavity dual-comb laser that pumps a single OPO cavity. The pump has 1.7 W average power per comb at 1054 nm with 80-MHz repetition rate. The OPO ring cavity is pumped in opposite directions by the two pumps. The idler beams have >280 mW average power at 3500 nm with 145-nm bandwidth. We characterize the signal noise and find shot-noise-limited performance (RIN below -155 dBc/Hz at >1 MHz frequencies). Our approach represents a low-noise solution to dual-comb spectroscopy across the short-wave infrared and mid-infrared spectral regions.
Christopher R. Phillips,Carolin P. Bauer,Justinas Pupeikis,Benjamin Willenberg,Sandro Camenzind, andUrsula Keller
"Dual-comb optical parametric oscillator with low noise pumped by free-running dual-comb laser", Proc. SPIE PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, PC119850E (1 April 2022); https://doi.org/10.1117/12.2609525
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Christopher R. Phillips, Carolin P. Bauer, Justinas Pupeikis, Benjamin Willenberg, Sandro Camenzind, Ursula Keller, "Dual-comb optical parametric oscillator with low noise pumped by free-running dual-comb laser," Proc. SPIE PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, PC119850E (1 April 2022); https://doi.org/10.1117/12.2609525