Equivalent Performance in C- and L-Bands of Digital Supermode Distributed Bragg Reflector Lasers

New results on the design and performance of digital supermode distributed Bragg reflector lasers for L-band operation are presented. The L-band device, which is fabricated using the same InP-based process as its C-band equivalent is shown to give essentially the same performance. The design changes required are discussed and a detailed comparison presented between C- and L-band devices. Together, a two-chip solution can provide more than 200 consecutive 50-GHz spaced channels (82-nm bandwidth) with SMSR greater than 45 dB and fiber-coupled leveled powers of 13 dBm.