SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : Lightpath Technologies: LPTH New WDM player
LPTH 6.195+0.2%Nov 21 9:30 AM EST
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: craig crawford who wrote (276)12/17/1997 2:09:00 AM
From: Tim Bagwell  Read Replies (1) of 1219
 
Woah boy...this article really raises my BS flag. My guess is that this company doesn't know much about fiber.

High power lasers in fiber excite a non-linear effect known as four-wave mixing which leads to signal distortion. The low line-width further exacerbates the problem because the spectral power density increases. In fact, in some applications lasers are actually modulated with a signal that effectively increases the line-width to reduce this effect.

Furthermore, dispersive effects in fiber are not overcome by increasing power. Dispersion has to do with the modulation placed on the carrier, not the laser itself. The idea that increasing the laser power will increase the DWDM reach to 1000 km is bogus.

High power lasers exist today but are not used in telecom for these reasons. Also, the lifetime and drift of high power lasers are too poor to be serious candidates.

Also, for short haul high power is not necessary because the distances are shorter to begin with reducing the need for power.

There might be some advantage in some undersea fiber which operates on a different principle (where amplifiers are expensive to maintain). But those systems are already on the drawing board so they don't represent an opportunity anytime soon.

I can't see this product as a serious contender in fiber applications.

Thanks for the post Craig!
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News