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, Harith
• Format: Article
• Published: Elsevier 2016
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/17738/; http://dx.doi.org/10.1016/j.yofte.2016.09.002
• Institution: Universiti Malaya

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.