Nippon Telegraph and Telephone Corporation

Deutschetelekom Ag

Arnold Mattheus

Yutaka Miyamoto

Yoshiaki Kisaka

Masahito Tomizawa

Akira Hirano

Werner Weiershausen

Matthias Gunkel

Ralph Leppla

Felix Wissel

Yutaka Ntt Intellectual Property Center Miyamoto

Akira Ntt Intellectual Property Center Hirano

Sascha Dipl-Ing Vorbeck

Yoshiaki Ntt Intellectual Property Center Kisaka

A device and method for adjusting the chromatic dispersion in an optical transmission system includes an optical element having a temperature-dependent chromatic dispersion. The device and method further include a device for adjusting a temperature or a temperature distribution of at least one region of the optical element for providing a predefined chromatic dispersion of the optical element. Therefore, the chromatic dispersion of the optical element may be regulated along an optical transmission path.

Device and method for adjusting chromatic dispersion

The present invention proposes a method whereby during a specified/specifiable observation period (T) , the polarization states of optical transmission system and/or the optical signals transmitted by the optical transmission system are changed by applying a targeted intervention in at least one position of the transmission line, and at a second position which is interposed at least one place downstream from the first position of the optical transmission line, a specified/specifiable signal characteristic (BER) is qualitatively measured and checked for adherence to a specified/specifiable threshold condition (BER) and the PMD-induced outage probability of the optical transmission system is calculated on the basis of the ratio between the length of that share of the time (T), during which the measured signal characteristic fails to meet the threshold condition (BER), to the length of the observation period (T).

Processes and devices for the determination of a PMD-induced outage probability of an optical transmission system

Growing community of inventors

Muenster, Germany

Arnold Mattheus