L-Band Quantum-dash Self-Injection Locked Multiwavelength Laser Source for Future WDM Access Networks

Injection-Locked Quantum-Dash Laser in Far L-Band 192 Gbit/s DWDM Transmission

“…Furthermore, although a DP-QPSK modulation scheme was adopted in the transmission, due to equipment limitations, only one of the two received polarizations was analyzed. In other words, by including the second received polarization, which should show a similar performance to the other one as we have observed in our previous works [6,10], the effective aggregate data rate would double, i.e., 384 Gbit/s. It is to be noted that the number of unified optical power channels and their wavelength selection are constrained by the comb generating circuit and the limited bandwidths of various equipment (EDFA, TBPF, and OMA), respectively.…”

“…Moreover, these quantum confined nanostructure-based lasers possess niche features such as compact size, low power consumption, integrability in hybrid optical-silicon systems [8,9], and more importantly their inherent broadband gain profiles due to inhomogeneous dash sizes owing to the selfassembly growth process. Although this latter feature seems a disadvantage for lasers, however, has been exploited to realize 1550 nm multiwavelength QDLD or comb sources [7], which has consequently, qualified them as promising contenders for source-unified NG-PON paradigms [10].…”

InAs/InP quantum-dash lasers

“…In addition, our group [106] exploited the self-injection locking scheme to demonstrate a multi-wavelength QD-LD with mode selectivity from 1 to 16 channels or locked FP modes in mid L-band wavelengths, as shown in Fig. 5.13A.…”

“…5.13B, with clear constellation diagrams for both transmission rates. Moreover, Shemis et al also investigated the deployment of this multiwavelength self-seeded QD-LD for future access optical access networks by proposing a plausible next generation PON [106], and over an indoor 5 m FSO channel [107] in mid L-band, with a potential aggregate capacity of 1.28 Tb/s.…”

Single and Multiple Longitudinal Wavelength Generation in Green Diode Lasers

“…In this case, various nanostructures viz. quantum well [13], quantum dash [14]- [16], and quantum dot [17], [18] based lasers have been engaged. Hence, a compact coherent multiple wavelength visible laser diode with narrow and uniform wavelength spacing is of paramount importance to facilitate high capacity wavelength division multiplexed visible light communication (WDM-VLC) system, which is considered as a viable last mile-access network infrastructure.…”