Volume 4, Issue 9

Making gratings from doped fibers with near-UV radiation

Sept. 1, 2002

Using longer wavelengths to write fiber Bragg gratings could ease the process-if researchers can speed up the writing at these wavelengths. By doping the fiber with holmium and...

DWDM & ROADM

High-port-count interleavers provide network design options

Sept. 1, 2002

The technique of interleaving wavelengths is an effective way to narrow e×isting 200- or 100-GHz DWDM systems down to 50-, 33-, or 25-GHz channel spacing. To accomplish this goal...

DWDM & ROADM

An easy question

Sept. 1, 2002

How are you? In any language, the question is usually a casual form of greeting and the person posing it doesn't expect a real answer. Yet these days it is the question that we...

DWDM & ROADM

Pulse-generating lasers drive high-speed applications

Sept. 1, 2002

The evolution to higher data rates such as 40 Gbit/s requires a number of new engineering solutions. Among them is a change to return-to-zero (RZ) coding format. As with all technical...

Components

Measuring tiny mode-field diameters allows efficient coupling

Sept. 1, 2002

Lensed and tapered specialty fibers are designed to optimize coupling between the fiber and optical components such as edge-emitting laser diodes and the waveguides in an integrated...

More content from Volume 4, Issue 9

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Moving into the market A discussion with Simon Lui of Wuhan Telecommunication Devices

Sept. 1, 2002

Simon Lui is first deputy general manager of Wuhan Telecommunication Devices in Wuhan, China. He received his undergraduate degree in marketing and a master's degree in management...

DWDM & ROADM

Simultaneous measurement speeds the pace of production

Sept. 1, 2002

Falling prices coupled with a market slowdown during the last 18 months have driven a major shift in component manufacturers' priorities. Reducing production costs has replaced...

Home

Dynamic gain equalizers balance power in long-haul systems

Sept. 1, 2002

The amplification of multiple optical channels has increased the distance between electrical regenerators almost an order of magnitude and has reduced long-haul transmission costs...

Home

Microfluidic fiber for tunable transmission

Sept. 1, 2002

Fibers may take a more active role in future communications systems if a new class of devices proves successful. A recent collaboration by Lucent Technologies and OFS Laboratories...

Components

AWG configuration reaches across S- and L-bands

Sept. 1, 2002

Researchers at NTT Photonics Laboratories in Ibaraki, Japan, have invented an arrayed-waveguide device that operates over a wide wavelength range, produces a stable, narrowband...

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FDTD method simulates photonic crystals

Sept. 1, 2002

It would be impossible to design and simulate microprocessors without very powerful CAD programs to model microelectronic circuits and structures. Likewise the photonics industry...