The nonlinearity difference in the two passbands of a distributed-feedback semiconductor laser amplifier was studied experimentally. A theoretical explanation was given by using the transmission matrix approach. The difference of nonlinearity in the two passbands was found to be enhanced greatly by the mechanism of asymmetric facet reflection.

4rthogonal frequency division multiplexing (OFDM) particularly suffers from the presence of nonlinearities since the signal amplitude is Rayleigh distributed. The degradation introduced by the nonlinear amplifier in the transmitter can be significantly reduced by using an analog cubic predistorter minimum mean square error (MMSE) predistorter proposed by the authors in [l].

CMOS implementations for RF applications often employ technology modifications to reduce the silicon substrate loss at high frequencies. The most common techniques include the use of a high-resistivity substrate (ρ>10Ω-cm) or silicon-on-insulator (SOI) substrate and precise bondwire inductors [1, 2]. However, these techniques are incompatible with low-cost CMOS manufacture. This design demonstr...

There are many benefits to implementing a service oriented architecture (SOA), such as the efficiency gained in utilizing shared resources, the flexibility of composing systems with model-based constructs, and the ability to incorporate centralized policies and oversight mechanisms. However, as services proliferate and the applications that consume them get more complex, the need to better mana...

Fibre Raman amplifiers are being deployed in many new long-haul and ultra long-haul fibre-optic transmission systems, making them the first and most widely commercialized nonlinear optical devices in telecommunications. One of the main reasons for this is their improved noise figure and reduced nonlinear penalty of fibre systems hence allowing for longer amplifier spans. In this paper, we have ...

This work reports a multipurpose highly linear ultrawideband amplifier with gain-bandwidth product (GBP) of 1.75 THz, the highest reported in any monolithic microwave integrated circuit (MMIC) process. A transimpedance is cascaded distributed amplifier, emulating receiver subsystem. Using diamond heat spreader, to dissipate from transistors, amplification subsystem can achieve very high output ...

Optical distribution networks using remotely pumped erbium-doped fiber amplifiers (EDFAs) with a single pump source at the head end can conveniently provide signal gain without adding to the power-consumption cost and management complexity of having multiple locally pumped EDFAs in densely populated metropolitan areas. We introduce an analytical model for understanding the basic physical founda...