Wavelength uniformity in λ/4 shifted DFBlaser array WDMtransmitters

Abstract
Six-element quarter-wave-shifted DFB arrays have been fabricated using holographic printing with e-beam generated quartz phase masks. A standard deviation of s = 0.18 nm from a uniform WDM channel spacing has been achieved, a dramatic improvement over the values associated with wafer-wide DFB wavelength distributions.

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