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Group Delay Characterization of Dispersive Devices Using a Pulse Temporal Intensity Measurement Setup

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3 Author(s)
Fangxin Li ; EMT, Inst. Nat. de la Rech. Sci., Varennes, QC ; Park, Y. ; Azana, J.

We propose and demonstrate a novel technique for group delay (GD) characterization of dispersive devices. The proposed technique involves the measurement of the temporal intensity profiles of a dispersed ultrashort optical pulse (i.e., after the device under test) and its first time derivative, which can be obtained by simple linear propagation through an all-fiber optical filter. The GD can be reconstructed using a direct and noniterative algorithm. We present experimental results for the measurement of the GD (including group-delay ripple) of high-dispersion and low-dispersion chirped fiber Bragg gratings.

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Photonics Technology Letters, IEEE  (Volume:20 ,  Issue: 24 )