Allan E, Alabbadi A, Castro-Marín P, Ostapenko H, Del'Haye P, Reid DT (2026)
Publication Type: Journal article
Publication year: 2026
Book Volume: 51
Pages Range: 337-340
Journal Issue: 2
DOI: 10.1364/OL.582185
Broadband frequency combs with mode spacings of ≥1 GHz provide a valuable resource for optical frequency metrology and astrophotonics. Significant average powers are often needed to reach the pulse energies required for supercontinuum generation at 1 GHz repetition rates, putting this beyond the reach of most simple ultrafast lasers. Here, by using dispersion-engineered Si3N4 waveguides, we report octave-spanning comb generation from 539 to 1078 nm (-20 dB bandwidth) pumped with a three-element 1 GHz Ti:sapphire laser powered by a single laser diode. Laser repetition-rate stability of 790 mHz is achieved over a 1-hour duration, and carrier-envelope-offset control and stabilization to a single-frequency cw laser is presented. The system offers a simple route to a coherent, broadband supercontinuum spanning the visible to the near-infrared, with potential as an enabling technology for optical frequency metrology, quantum-timekeeping and astrophysical spectrograph calibration.
APA:
Allan, E., Alabbadi, A., Castro-Marín, P., Ostapenko, H., Del'Haye, P., & Reid, D.T. (2026). Octave-spanning frequency comb from a single-diode-pumped 1 GHz Ti:sapphire laser. Optics Letters, 51(2), 337-340. https://doi.org/10.1364/OL.582185
MLA:
Allan, Ewan, et al. "Octave-spanning frequency comb from a single-diode-pumped 1 GHz Ti:sapphire laser." Optics Letters 51.2 (2026): 337-340.
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