  Fiber Bragg Grating (FBG) sensors offer multiple benefits in comparison with
electronic sensors due to their compactness, electromagnetic immunity as well
as their resistance to harsh environments and their multiplexing capabilities.
Structural Health Monitoring (SHM) is one of the various potential industrial
applications that could take full advantage of those sensors. However, there is
a need for a low size, weight, power and cost interrogation unit for certain
application areas such as aerospace or aeronautics. That is the reason why
recent efforts have been made to use integrated components and circuits for
interrogation of FBGs. Among different techniques, interrogation with a swept
laser source is of high interest since it has a high multiplexing capability
and could reach a high level of integration using other integrated components
such as photodetectors, grating couplers or directional couplers to form a
compact interrogation unit. In this paper, we present characterization results
of a fully-packaged hybrid III-V on silicon tunable laser diode operating in
the C and L bands. Wavelength maps are produced and analyzed and modulation of
emitted wavelength is discussed. Preliminary results corresponding to a
moderate frequency (10-Hz sweep rate) were obtained and FBG reflection spectra
acquired with a broadband source (BBS) and a swept laser diode are compared.
Finally, we discuss potential design improvements in order to reach high scan
rates (> 10 kHz) and a large tuning range.
