Wim van Etten

A broadband high dynamic range analog photonic link using push-pull directly-modulated semiconductor lasers

We demonstrate an analog photonic link with a high multioctave spurious-free dynamic range (SFDR) of 119 dBHz2/3. The link consists of a pair of semiconductor DFB lasers modulated in a push-pull manner and a balanced photodetector. With precise amplitude and phase matchings, a signal enhancement of 4.5 dB and a second-order inter-modulation distortion suppression of 40 dB relative to the case of a single arm optical link with one laser can be achieved. To our knowledge, the measured SFDR is one of the highest broadband value ever achieved with directly modulated lasers.

Link Aggregation in a Multi-Wavelength Reconfigurable Photonic Access Network

Link Aggregation is a mechanism used in enterprise networks to bundle Ethernet links. This paper proposes the use of such techniques in the Broadband Photonics (BBP) Network. This network is a dynamically re-configurable photonic access network.

Case for Dynamic Reconfigurability in Access Networks

The paper discusses the merits of having a reconfigurable access network. The network is viewed as a stack of logical PONs in which bandwidth can be redistributed on an inter-PON scale. The redistribution allows for optimal distribution of bandwidth to the end user.

Impact of crosstalk on the performance of an optical cross-connect considering finite extinction ratio

In this paper we investigate the performance degradation in a wavelength division multiplexing network due to crosstalk in optical cross-connects. Worst-case analysis is carried out including in-band crosstalk components. In contrast with the approximate methods in the literature, all beat-noise terms are included, and both input signal hypotheses are considered. The results are obtained by using appropriate importance sampling strategies. The optimization of importance sampling parameters was done with new adaptive techniques based on stochastic Newton recursions, combined with a novel technique called the g-method. Accurate performance measures for practical system parameter values are obtained in short simulation run-times. Infinite and finite extinction ratios are considered. The results indicate that the detection threshold has a strong impact on the system performance. The importance sampling techniques are also useful for the optimization of this system parameter.

Performance comparison of two analog photonic links employing a pair of directly modulated lasers and a balanced photodetector

We compare the effects of low biasing and push-pull modulation on the spurious-free dynamic range (SFDR) of an analog photonic link (APL) architecture employing a pair of directly-modulated laser diodes and a balanced photodetector.