Fiber design consideration for lump Raman amplification in passive optical networks

In-field Raman amplification on coherent optical fiber links for frequency metrology.

Distributed Raman amplification (DRA) is widely exploited for the transmission of broadband, modulated signals used in data links, but not yet in coherent optical links for frequency metrology, where the requirements are rather different. After preliminary tests on fiber spools, in this paper we deeper investigate Raman amplification on deployed in-field optical metrological links. We actually ...

Polarization Control for Slow and Fast Light in Fiber Optical, Raman-assisted, Parametric Amplification

Efficient slow and fast light fiber devices based on narrow band optical parametric amplification require a strict polarization control of the waves involved in the interaction. The use of high birefringence and spun fibers is studied theoretically, possible impairments evaluated, and design parameters determined.

Optical fiber probe for biomedical Raman spectroscopy.

In vitro experiments have demonstrated the ability of Raman spectroscopy to diagnose a wide variety of diseases. Recent in vivo investigations performed with optical fiber probes were promising but generally limited to easily accessible organs, often requiring relatively long collection times. We have implemented an optical design strategy to utilize system throughput fully by characterizing th...

Bandwidth analysis of multimode fiber passive optical networks (PONs)

Selecting the Right Nzdf Fiber for Distributed Raman Amplification

Distributed Raman amplification, the technology used to increase the span reach in 10 and 40 Gb/s systems, may reduce overall system cost, in part by reducing the number of amplifiers in the network. This technology has been adapted in commercial systems and is now implemented in the field both in the United States, Europe and Asia.