Wide-bandwidth frequency locking of a 1083-nm extended-cavity DBR diode laser to a high-finesse Fabry-Pérot resonator

摘要

We report frequency locking of a 1083-nm DBR diode laser on a high-finesse Fabry-Pérot cavity (ℱ ≃ 2800). We used the Pound-Drever FM locking scheme at a modulation rate of 5 MHz. A lock bandwidth of about 1 MHz is obtained by using a three-path servo loop. The laser linewidth is narrowed to ∼ 5 kHz. The root Allan variance σ(τ) of the laser frequency with respect to the cavity reaches a minimum of 4 ± 1 Hz at τ = 10 s. © Springer-Verlag 1998.