In this paper, we demonstrate that a prism coupling characterization technique can lead to simpler Waveguide Bragg
Grating (WBG) designs and easier fabrication process by avoiding channel transmission. The experimental results have
shown that the incident laser beam's collimation was maintained after coupling to a planar waveguide. A
characterization set-up using two prisms was designed for measuring transmission characteristics of integrated structures
and eventually planar waveguides in the visible or in the IR range. Since a reasonable overall optical efficiency of 10%
has been demonstrated for this set-up, the prism approach can be eventually utilized in Bragg Grating structures
characterization.
The applications of microwave optoelectronics are extremely large since they extend from the Radio-over-Fibre to the
Homeland security and defence systems. Then, the improved maturity of the optoelectronic components operating up to
40GHz permit to consider new optical processing functions (filtering, beamforming, ...) which can operate over very
wideband microwave analogue signals. Specific performances are required which imply optical delay lines able to
exhibit large Time-Bandwidth product values. It is proposed to evaluate slow light approach through highly dispersive
structures based on either uniform or chirped Bragg Gratings. Therefore, we highlight the impact of the major parameters
of such structures: index modulation depth, grating length, grating period, chirp coefficient and demonstrate the high
potentiality of Bragg Grating for Large RF signals bandwidth processing under slow-light propagation.
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