Dynamic gain equalizer with wide operation band and with fine resolution by using super high △ planar lightwave circuit

摘要

We report the fabrication of an integrated dynamic gain equalization filter on a silica-based planar lightwave circuit. The filter is based on cascaded Mach-Zehnder interferometers (MZIs). By using 1.5 % contrast waveguide, we could cascade 10 Mach-Zehnder interferometers to achieve fine resolution. The device flattened the amplified spontaneous emission spectrum of an erbium doped tellurite fiber amplifier to a ripple of less then 1 dB over a wavelength range of 69 nm.