Measurement of fiber non-linearity based on four-wave mixing with an ASE source

• Main Authors: Kharraz, O. M., Mohammad, A. B. B., Forsyth, D. I., Ahmad, H.
• Format: Article
• Published: Academic Press Inc. 2016
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/71144/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-84986596589&doi=10.1016%2fj.yofte.2016.09.002&partnerID=40&md5=4cc7752d1ab3fb62c96432d161ed348e
• Institution: Universiti Teknologi Malaysia

A new four-wave mixing scheme to practically measure the non-linear coefficient of fibers is introduced. A single erbium-doped fiber amplifier is used to create the two wavelengths for the four-wave mixing inputs, which are pre-spectrally sliced via fiber Bragg grating filters. The proposed scheme avoids the Brillouin backscattering, rendering this a more accurate method to determine fiber nonlinearities than conventional coherent FWM systems. Furthermore, the generated FWM seed beams are pure and ultra-narrow, and can therefore be treated as coherent light. Consequently, accurate degeneracy factor can also be taken into consideration.