High spectral purity optical source stabilized on a fiber ring resonator

Gilles Bailly (1) , Olivier Llopis (2) , Arnaud Fernandez (2)

1 LAAS-I2C - Service Instrumentation Conception Caractérisation
2 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications

This paper demonstrates the stabilization of an external cavity semiconductor laser at 1550 nm on an ultra-high Q factor fiber ring resonator (FRR). Based on a Pound-Drever-Hall technique, our system is optimized in order to take into account the properties of the FRR which features a large Q factor (2 10^9) but a relatively small free spectral range (2 MHz). The measured performances of the stabilized laser shows a frequency noise level as low as 0.4 Hz^2 /Hz in the 1 kHz to 10 kHz range and a linewidth lower than 30 Hz for 5 ms integration time.

Mots clés: Semiconductor laser; Optical resonator; Phase noise; Linewidth; Allan deviation

Domaines: Micro et nanotechnologies/Microélectronique; Optique / photonique; Electronique

Gilles Bailly, Olivier Llopis, Arnaud Fernandez. High spectral purity optical source stabilized on a fiber ring resonator. IEEE Photonics Technology Letters, 2020, 32 (5), pp.255 - 258. ⟨10.1109/LPT.2020.2970269⟩. ⟨hal-02469863⟩