Light Reading Mobile – Telecom News, Analysis, Events, and Research
News Wire Feed  

VI Tests 25G VCSEL

February 19, 2013 |
BERLIN -- VI Systems GmbH and the Department of Electrical and Computer Engineering at the University of Illinois, USA demonstrated jointly at the Photonics West Conference a novel Single Mode Photonic Crystal VCSEL (vertical cavity surface emitting laser). The photonic crystal (PC) VCSEL is manufactured from a proprietary VI System’s wafer which was processed at the University of Illinois at Urbana-Champaign with a defined photolithographic pattern of holes in the top mirror. This process results in a single mode emission of the VCSEL at 850nm wavelength.

PC VCSEL operating at low current density of 5.4 kA / cm2 enables -3dB bandwidth of 18GHz. Error free optical data transmission at 25 Gbit/s over 1-km OM4 multimode fiber has been realized at 1 km distances at very low received power of only 70 µW at the Department of Solid State Physics at the Technical University of Berlin, Germany, with a high speed photoreceiver module from VI Systems GmbH.

Single-mode VCSELs extend the reach over multimode fiber by eliminating the impact of chromatic dispersion of glass at 850 nm wavelength, which is particularly important for ultrahigh transmission bit rates within the next generation of datacom and computercom standards.

VI Systems GmbH



Currently we allow the following HTML tags in comments:

Single tags

These tags can be used alone and don't need an ending tag.

<br> Defines a single line break

<hr> Defines a horizontal line

Matching tags

These require an ending tag - e.g. <i>italic text</i>

<a> Defines an anchor

<b> Defines bold text

<big> Defines big text

<blockquote> Defines a long quotation

<caption> Defines a table caption

<cite> Defines a citation

<code> Defines computer code text

<em> Defines emphasized text

<fieldset> Defines a border around elements in a form

<h1> This is heading 1

<h2> This is heading 2

<h3> This is heading 3

<h4> This is heading 4

<h5> This is heading 5

<h6> This is heading 6

<i> Defines italic text

<p> Defines a paragraph

<pre> Defines preformatted text

<q> Defines a short quotation

<samp> Defines sample computer code text

<small> Defines small text

<span> Defines a section in a document

<s> Defines strikethrough text

<strike> Defines strikethrough text

<strong> Defines strong text

<sub> Defines subscripted text

<sup> Defines superscripted text

<u> Defines underlined text

Network Computing encourages readers to engage in spirited, healthy debate, including taking us to task. However, Network Computing moderates all comments posted to our site, and reserves the right to modify or remove any content that it determines to be derogatory, offensive, inflammatory, vulgar, irrelevant/off-topic, racist or obvious marketing/SPAM. Network Computing further reserves the right to disable the profile of any commenter participating in said activities.

 
Disqus Tips To upload an avatar photo, first complete your Disqus profile. | View the list of supported HTML tags you can use to style comments. | Please read our commenting policy.
 
Most Popular
Read
White Papers SPONSORED CONTENT
Featured
Resource Library SPONSORED CONTENT
Orthogonal Frequency Division Multiplexing (OFDM)
A modulation scheme where one high-speed signal is split into multiple lower-speed signals