Spatially multiplexed single-cavity dual-comb laser

• DOI: 10.1364/optica.457787
• Publication Date: 2022-06-13T13:30:07Z
• Authors: J. Pupeikis; B. Willenberg; S. L. Camenzind; A. Benayad; P. Camy; C. R. Phillips; U. Keller
• Keywords: 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Physics - Optics; Optics (physics.optics)

Single-cavity dual-comb lasers are a new class of ultrafast that have wide possible application space including pump–probe sampling, optical ranging, and gas absorption spectroscopy. However, to date, laser cavity multiplexing has usually come with trade-off in performance or relative timing noise suppression. We present method for single support pair noise-correlated modes. These modes share all intracavity components take near-common path, but do not overlap on any active elements. implement the an 80-MHz delivering more than 2.4 W average power per comb sub-140-fs pulses. reach sub-cycle jitter 2.2 fs [20 Hz, 100 kHz]. With this technique, we can slow feedback repetition rate difference <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi mathvariant="normal">Δ</mml:mi> <mml:mspace width="negativethinmathspace"/> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi>f</mml:mi> </mml:mrow> mathvariant="normal">r</mml:mi> mathvariant="normal">e</mml:mi> mathvariant="normal">p</mml:mi> </mml:msub> </mml:math> , enabling quantity be drift-free, low jitter, adjustable—a key combination practical applications was lacking prior single-cavity systems.