Product category:
Optical Filters, Lenses, Gratings etc
News Release from: Bookham | Subject: AED III multiplexer/demultiplexer solutions
Edited by the Electronicstalk Editorial
Team on 21 July 2004
Thin film filters boost optical
multiplexing
A new class of high-channel-count scalable multiplexer/demultiplexer solutions is based on thin-film-filter (TFF) technology for telecomms applications.
A new class of high-channel-count scalable multiplexer/demultiplexer solutions is based on thin-film-filter (TFF) technology for telecomms applications The new products give customers a low entry-cost module solution with full expandability of up to 40 channels in DWDM networks
This article was originally published on Electronicstalk on 28 Feb 2008 at 8.00am (UK)
Related stories
Pump module eases DSL replacement
The multimode laser diode allows service providers to extend triple-play service delivery to fibre customers located further away from the central office or the cable head-end.
Modulator tunes lasers up to 40Gbit/s
Reduced size InP MZ platform will allow Bookham to offer 40Gbit/s products in smaller footprints compared with existing 40Gbit/s offerings employing larger optics.
The same module can be used in both multiplexing/demultiplexing and in reconfigurable optical add/drop (ROADM) applications.
Upgrades can be handled in 8-10 channel increments in any wavelength order with minimal insertion loss increase.
"This is a major development in a market where world-class performance against cost is always an issue", said Dennis Derickson, Bookham's Thin Film Applications Engineer.
Optical filtering based on "banded architecture" arranges separate optical communications channels on a particular wavelength into groups and, instead of processing them one at a time, the filter processes the group, reducing overall footprint and optimising device efficiency and cost.
Based on Bookham's proprietary AED III (advanced energetic deposition, version III) technology, a new class of banded filters called "8 skip 0" and "10 skip 0" have been introduced for use in 100GHz channel spacing DWDM systems.
These filters enable 8 or 10 channels at a time to be filtered without skipping, or sacrificing, the neighbouring channels.
This capability is more than double the level of the industry's more commonplace four-channel versions.
Bookham's Thin Film Design Team Leader, Loren Stokes, explained the significance of the development: "Four years ago, '4 skip 1' (that is, four channel filtering with the loss of one adjacent channel, due to signal degradation/interference at the filter's edge) banded filters were at the forefront of design".
"By 2002/2003, Bookham and other companies had introduced '4 skip 0' filters to the market, eliminating the need for skipped channels".
"Bookham's latest introduction has achieved both '8 skip 0' and '10 skip 0' filters".
These new filters allow multiplexers and demultiplexers to be built with a simplified, flexible, and lower cost architecture.
This product offering is a significant contribution to the industry, allowing thin-film-filter solutions to be performance and cost competitive.
The product range is now available and is currently being sampled with a number of customers.
• Bookham: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
