View all newsletters
Receive our newsletter - data, insights and analysis delivered to you
  1. Technology
April 15, 1987


By CBR Staff Writer

British Telecom’s Martlesham Laboratories may not have the world reknown of AT&T Bell Laboratories, but it has a string of firsts to its credit, and it is now claiming another breakthrough in the field of optical transmission. Even with monomode optical cables, repeaters are needed every 100 miles or so, and these presently involve converting the optical signal to an electrical one, amplifying it and generating a new optical signal. Now researchers at Martlesham have discovered a coating for a solid state laser which reduces reflectivity and causes it to operate as a simple optical amplifier, holding out the hope of replacing large and power-hungry repeaters that may have to be installed in inaccessable places, with a tiny crystal optical amplifier. There is no indication of how soon the device could be used commercially, but it has been successfully tested in a 75 mile optical link to Colchester.

Content from our partners
Rethinking cloud: challenging assumptions, learning lessons
DTX Manchester welcomes leading tech talent from across the region and beyond
The hidden complexities of deploying AI in your business

Websites in our network
Select and enter your corporate email address Tech Monitor's research, insight and analysis examines the frontiers of digital transformation to help tech leaders navigate the future. Our Changelog newsletter delivers our best work to your inbox every week.
  • CIO
  • CTO
  • CISO
  • CSO
  • CFO
  • CDO
  • CEO
  • Architect Founder
  • MD
  • Director
  • Manager
  • Other
Visit our privacy policy for more information about our services, how Progressive Media Investments may use, process and share your personal data, including information on your rights in respect of your personal data and how you can unsubscribe from future marketing communications. Our services are intended for corporate subscribers and you warrant that the email address submitted is your corporate email address.