Apparatus for measuring optical transmission characteristic

Details Apparatus for measuring optical transmission characteristic Apparatus for measuring optical transmission characteristic

1994-11-29

1996-12-17

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359189, 371 51, H04B 1008, H04B 1000

Patent

active

055859542

ABSTRACT:
An apparatus for measuring optical transmission characteristic, which has an input unit of data signal and of clock pulses, a signal decision unit, a display unit and a control unit. The signal decision unit comprises a plurality of signal decision circuits. A Q value employed as a parameter for the evaluation of the transmission characteristic of an optical communication system can be obtained in real time since bit error rates necessary for the calculation of the Q value can be simultaneously obtained by the plurality of signal decision circuits.

REFERENCES:
S. Yamamoto, N. Edagawa, H. Taga, Y. Yoshida and H. Wakabayashi, "Observation of BER Degradation Due to Fading in Long-Distance Optical Amplifier System." In IEEE Electronics Letters, vol. 29, No. 2 (21 Jan. 1993), pp. 209-210.
Peter K. Runge and Hiroharu Wakabayashi, "Resultats et Demonstration de l'Infrastructure de Test d'un System Optique de 9000 km [9000 km Optical Amplifier System Test Facility Results]." In SUBOPTIC '93, S4.1, pp. 81-84.
Neal S. Bergano, F. W. Kerfoot and C. R. Davidson, "Margin Measurements in Optical Amplifier Systems." In IEEE Photonics Technology Letters, vol. 5, No. 3 (Mar. 1993), pp. 304-306.
Marcuse, Derivation of Analytical Expressions for BE Probability in Ligtwave Systems with Optical Amplifiers, 1990 IEEE.
Giles et al, Propagation of Signal and Noise in Concatenated Erbium-Doped Fiber Optic Amplifiers, 1991 IEEE.
Humblet et al, On the Bit Error Rate of Lightwave Systems with Optical Amplifiers, 1991 IEEE.

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