Beschreibung:
<jats:p>Raman-based distributed temperature sensor (RDTS) devices have grown
dramatically over the past two decades, partially driving the optical
sensor industry. Over nearly four decades, most academic
investigations about RDTS have focused on developing distributed
sensor devices operating at the wavelength of 1550 nm, given
the low loss of standard single-mode fibers in this spectral region.
Certainly, the wavelength of 1550 nm is ideal for long-range
sensing applications. However, at this wavelength, the signal-to-noise
ratio (SNR) of RDTS systems is degraded, given the low intensity of
the measured signals. Looking for simple solutions to improve the SNR
of this sensing technology, we discuss in this paper an RDTS operating
at the spectral region of 840 nm as an alternative for
short-range distributed temperature sensing applications delivering an
improved SNR.</jats:p>