In this work we expand the previous report on the performance of an enhanced version of a Brillouin ring laser (BRL) based on a short-cavity layout that is resonant for both pump and Brillouin signal and implementing an active heterodyne wavelength-locked technique for the tuning operation, which was compared with a previously demonstrated long-cavity (LC) (similar to 2 km) BRL pump-probe source. We provide a detailed analysis of the technique required to achieve double resonance, evaluate the relative intensity noise in the 0-50 kHz range (which is shown to still be below similar to-100 dB/Hz) and use the previous relative intensity noise comparison of the two sources to estimate the potential temperature/strain resolution improvement in BOTDA measurements.
Wavelength-locked low-noise Brillouin ring laser for Brillouin sensing / Marini, D; Rossi, L; Bastianini, F; Bolognini, G. - ELETTRONICO. - (2019), pp. 16-19. (Intervento presentato al convegno 2019 International Workshop on Fiber Optics in Access Networks (FOAN) tenutosi a Sarajevo, Bosnia Erzegovina nel 2-4 settembre 2019) [10.1109/FOAN.2019.8933796].
Wavelength-locked low-noise Brillouin ring laser for Brillouin sensing
Marini, DPrimo
;Rossi, LSecondo
;
2019
Abstract
In this work we expand the previous report on the performance of an enhanced version of a Brillouin ring laser (BRL) based on a short-cavity layout that is resonant for both pump and Brillouin signal and implementing an active heterodyne wavelength-locked technique for the tuning operation, which was compared with a previously demonstrated long-cavity (LC) (similar to 2 km) BRL pump-probe source. We provide a detailed analysis of the technique required to achieve double resonance, evaluate the relative intensity noise in the 0-50 kHz range (which is shown to still be below similar to-100 dB/Hz) and use the previous relative intensity noise comparison of the two sources to estimate the potential temperature/strain resolution improvement in BOTDA measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
