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All-optical gain-clamped erbium-doped fiber-ring lasing amplifier with laser filtering technique

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5 Author(s)
Subramaniam, T. ; Dept. of Phys., Malaya Univ., Kuala Lumpur, Malaysia ; Mahdi, M.A. ; Poopalan, P. ; Harun, S.W.
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A unique laser filtering technique of a gain-clamped erbium-doped fiber amplifier based on ring-laser cavity is demonstrated. The filtering mechanism is achieved using a single fiber Bragg-grating, which also functions as a laser feedback reflector at the output end of the amplifier. This new design has low noise and most important, shows up to 98% reduction in output laser intensity as compared with a previous design studied earlier. An optimum result with gain and noise around 25 and 3.5 dB, respectively, obtained for a dynamic range of input signal power up to -8 dBm.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 8 )