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Updated: Apr 11, 2026
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Published on: July 11, 2025
11-GHz waveguide Nd:YAG laser CW mode-locked with single-layer graphene
Andrey G Okhrimchuk1, Petr A Obraztsov2
11] International Center of Laser Technologies, D. Mendeleyev University of Chemical Technology of Russia, 9 Miusskaya Square, Moscow 125047, Russia [2] Fiber Optics Research Center of RAS, 38 Vavilova Str., Moscow 119333, Russia.
Abstract:
We report stable, passive, continuous-wave (CW) mode-locking of a compact diode-pumped waveguide Nd:YAG laser with a single-layer graphene saturable absorber. The depressed cladding waveguide in the Nd:YAG crystal is fabricated with an ultrafast laser inscription method. The saturable absorber is formed by direct deposition of CVD single-layer graphene on the output coupler. The few millimeter-long cavity provides generation of 16-ps pulses with repetition rates in the GHz range (up to 11.3 GHz) and 12 mW average power. Stable CW mode-locking operation is achieved by controlling the group delay dispersion in the laser cavity with a Gires-Tournois interferometer.
