Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

Agere Systems Announces Industry’s Most Powerful Distributed Feedback Raman Pump Lasers for 10- and 40-Gb/s Optical Networks

Photonics Spectra
Jun 2001
Agere Systems, a provider of communications semiconductors, announced the industry's most powerful 14xx nm distributed feedback (DFB) Raman pump lasers used to boost signal power in ultra-high capacity optical networking systems. These pump lasers support Raman amplification in both co-pumping (in which the pump's optical power is transmitted in the same direction as the communications signal) and counter-pumping (in which power is sent against the signal) configurations with excellent wavelength stability.

These new additions to Agere's 269-type family of 1480 and 14xx nm pump lasers offer an operating power of 280 milliwatts (mW) with drive currents comparable to high-power Fabry-Perot (FP) lasers. 14xx nm pump lasers are used for Raman amplification, which boosts a signal using the transmission fiber as the gain medium.

These new high-power DFB products represent a breakthrough in 14xx nm pump laser technology by integrating the beneficial characteristics of an external FBG laser design -- such as stimulated Brillouin scattering suppression -- with the excellent relative-intensity noise (RIN) performance of a DFB laser. The combination of both characteristics is critical to enable co-propagating Raman pumping, which distributes gain over the first few kilometers of the transmission fiber. The typical RIN value of Agere's DFB lasers is -158 dB/Hz, a major improvement over comparable external FBG-stabilized lasers with a typical RIN of -125 dB/Hz. Integrating wavelength stabilization into the chip eliminates the external FBG and thus also improves the stabilization over operating temperature.

As We Go To PressBreaking NewsCommunicationsPresstime Bulletinlasers

Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.