50-Channel 100-GHz-Spaced Multiwavelength Fiber Lasers With Single-Frequency and Single-Polarization Operation

Abstract

We demonstrate single-polarization operation of a distributed Fabry-Perot multiwavelength fiber laser by adding an external cavity with polarization-dependent feedback. We show that the laser lines retain single-frequency operation with the additional benefit of reduced linewidth. The laser source covers the full <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> -band with 100-GHz channel spacing.