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Light Modulation Based on Fiber Cladding Mode Coupling Between Concatenated Long-Period Gratings

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3 Author(s)
D. Saez-Rodriguez ; Dpto. de Fisica Aplicada y Electromagnetismo, Universidad de Valencia, Burjassot, Valencia, Spain ; J. L. Cruz ; M. V. Andres

In-fiber efficient light modulation using two concatenated long-period gratings (TCLPG), written in single-mode fiber, is reported. The device is compressed in the middle of both gratings against a corrugated surface, with a piezoelectric, producing a transfer of energy between cladding modes which results in modulated light transmission. The TCLPG operates at 1542 nm, with a bandwidth of 29 nm and an insertion loss of 0.3 dB. The modulation depth is 20 dB and the rise time is 7.5 ms at a repetition rate of kilohertz.

Published in:

IEEE Photonics Technology Letters  (Volume:23 ,  Issue: 3 )