Hitless tunable WDM transmitter using Si photonic crystal optical modulators

Hiroyuki Ito, Yosuke Terada, Norihiro Ishikura, Toshihiko Baba
2015 Optics Express  
We have developed compact Si Mach-Zehnder modulators that are assisted by wideband low-dispersion slow light in lattice-shifted photonic crystal waveguides. We have also developed Si triangular-shaped coupled-microring multiplexers that allow a box-like spectrum, a wide free spectral range, and an efficient thermal tuning. In this study, we integrated three sets of these devices in a small footprint of 2.0 × 0.7 mm 2 and achieved their 25 Gbps/ch operation as a wavelength division multiplexing
more » ... ision multiplexing transmitter. Moreover, we demonstrated hitless wavelength tuning using thermo-optic switches loaded in the bus waveguide.
doi:10.1364/oe.23.021629 pmid:26368142 fatcat:wgvjosqpnvfzzaadyt7aefyfoa