Design, realization, and characterization of a ten-wavelengthmonolithic source for WDM applications integrating DBR lasers with aPHASAR

摘要

We present here the design, fabrication, and static as well asndynamic characteristics of a ten-wavelength, 200-GHz channel spacingnemitter for wavelength-division multiplexing applications. The source isnbased on the monolithic integration on InP of a ten distributed Braggnreflector laser array with a square-shaped transmission response PHASAR.nThe specific design of the PHASAR is detailed. The continuous-wavenoperation-one channel at a time-demonstrates a high monomode stabilitynwith a rejection better than 32 dB for all channels and all injectedncurrents; the 200-GHz channel spacing can be reached with an accuracynbetter than 25 GHz. High-speed characteristics demonstrate a 6.5-GHzndirect modulation bandwidth at -3 dB for a 70-mA current in then900-Μm-long active section. The chirp measured for a 2.5-Gb/snmodulation with a 10-dB extinction ratio is less than 1.5 Å fornevery wavelength