Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Arrangement for mitigating first order and second-order polarization mode dispersion in optical fiber communication systems










Image Number 2 for United States Patent #6658215.

A compensation arrangement for addressing the problem of first-order and second-order polarization mode dispersion (PMD) in an optical fiber communication system includes separate, independent elements for each type of PMD. First-order PMD may be compensated using conventional techniques related to adjusting the transit time differential between the polarization states. The second-order polarization mode dispersion is compensated by recognizing the separate sources of second-order PMD (pulse broadening analogous to chromatic dispersion, additional pulse broadening due to optical filtering (narrowing), and coupling of a portion of the optical signal into the orthogonal polarization relative to the main pulse with a different transmit time. A chirped fiber grating with a variable temperature gradient, a complementary optical filter with variable spectral transmission and a polarizer, respectively, can be used to compensate for these three sources of second-order PMD.








 
 
  Recently Added Patents
Access control method, information display device using the same, and information display system
Over the counter medicinal container with surface ornamentation
Device and implantation system for electrical stimulation of biological systems
Electrode material and use thereof for production of electrochemical cells
System and method for determining payroll related insurance premiums
Methods and systems for temporarily sharing position data between mobile-device users
Electrode for a plasma torch
  Randomly Featured Patents
Apparatus for mutually aligning the ends of two optical fibres that are to be connected
Semiconductor chip module
Animal training and tracking device having global positioning satellite unit
Control panel and control method thereof
Method and apparatus for computing allowable spindle rotation speed
Parallel-to-serial-data interface-adaptor
Device for improving the combustion of a fuel
Mobile communication terminal apparatus including moisture detection
Apparatus for rapidly accessing a large data base employing an optical disc reading system with multiple heads and track position compensation means
Laser scoring with curved trajectory