Impact of self phase modulation on the performance of Brillouin distributed fibre sensors [7653-140]
نویسندگان
چکیده
The spectral broadening of the pump pulse through self phase modulation in a time domain distributed Brillouin sensor is demonstrated to have a non-negligible detrimental effect, leading to a doubling of the effective gain linewidth after some 20 km in standard conditions. The theoretical modeling is fully confirmed by experimental results.
منابع مشابه
Detrimental effect of modulation instability on distributed optical fibre sensors using stimulated Brillouin scattering
Modulation instability can limit the resolution and the range of distributed fibre sensors based on stimulated Brillouin scattering. In this paper we analyse this process and suggest adequate methods to overcome it.
متن کاملDetrimental effect of self-phase modulation on the performance of Brillouin distributed fiber sensors.
We show that the spectral broadening of the pump pulse through self-phase modulation in a time-domain distributed Brillouin sensor has a considerably detrimental effect in the measurement, especially in the case of long distances and high-resolution pulses. Using 30 ns pump pulses with peak power of 276 mW, self-phase modulation leads to a doubling of the effective gain linewidth after some 20 ...
متن کاملTime gated phase-correlation distributed Brillouin fibre sensor
A random access distributed Brillouin fibre sensor is presented, based on phase modulation using a pseudo-random bit sequence (PRBS) together with time gating. The standard phase-correlation technique is known to show a noise level increasing linearly with the number of measured points due to weak gratings generated randomly along the whole sensing fibre. Here we show how intensity modulated pu...
متن کاملMitigating modulation instability in Brillouin distributed fibre sensors
A thorough study of the generation of modulation instability (MI) in distributed Brillouin fibre sensors is presented. ASE noise co-propagating with the pump pulses within the MI gain spectrum has been identified to be an important factor seeding modulation instability and reducing its power threshold. The paper describes how optical narrowband filtering reduces the pump depletion resulting fro...
متن کاملHFC/CATV Transmission Systems (Invited Paper)
During the past decade, cable television (CATV) systems have evolved from one-way broadcast of analog video transmission to two-way hybrid fiber/coaxial (HFC) networks delivering both analog and broadband services. The broadband services include high speed internet access, cable telephony, video-on-demand, and digital video. In this talk, we describe HFC transmission systems including the infra...
متن کامل