Fiber Optic Wiki

VCSEL-based 25-Gbps transmission at 850 nm nearing readiness

September 14, 2011

While module developers work to perfect 4x25-Gbps transmission over singlemode fiber for 100GBase-LR4 and -ER4 applications, technologists have already begun work on enabling similar transmission over multimode fiber. Recent demonstrations have shown progress on both the transmission and reception ends of the spectrum. The demonstrations indicate that 4x25-Gbps products could be readily available once standards are in place.

BroadLight’s Helios embedded processors

September 14, 2011

Billion Electric Co., Ltd. has selected the Helios embedded processor line from BroadLight, a supplier of fiber access processors, in the development of its new Active Ethernet carrier-class router product.

Optical communications repeater

September 13, 2011

An optical communications repeater is used in a fiber-optic communications system to regenerate an optical signal by converting it to an electrical signal, processing that electrical signal and then retransmitting an optical signal. Such repeaters are used to extend the reach of optical communications links by overcoming loss due to attenuation of the optical fibre and distortion of the optical signal. Such repeaters are known as 'optical-electrical-optical' (OEO) due to the conversion of the signal. Repeaters are also called regenerators for the same reason.

All-Optical regenerators

September 13, 2011

An alternative method of regeneration is through all-optical without requirement to convert back and forth. Using Non-linear optical fiber allow designers to use nonlinear effects of frequency shifting and frequency generation effects for regeneration. The key advantage of all-optical regeneration is power efficiency provided by the device, and simple integration into an optical network.

Electronic vs Optical regeneration

September 13, 2011

Due to the high data rates that can be achieved with optical systems, OEO repeaters are expensive to implement as electronics to handle those high data rates are expensive and difficult to construct. Also, since one repeater is required for each wavelength, and many tens of wavelengths may be transmitted down a single fibre, a lot of equipment is required for each fibre.

Parallel optical interface: Reference

September 13, 2011

A parallel optical interface is a form of fiber optic technology aimed primarily at communications and networking over relatively short distances (less than 300 meters), and at high bandwidths.

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