Device for assessing the transmission quality of an optical ampl

Details Device for assessing the transmission quality of an optical ampl Device for assessing the transmission quality of an optical ampl

1994-03-24

1995-08-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

359179, H01J 516

Patent

active

054442389

ABSTRACT:
A device for assessing the transmission quality of an optical amplifier includes a coupler for sampling on the upstream side of the amplifier equipment relative to the direction of propagation of the optical signal to be amplified by the amplifier equipment part of the power of an optical signal propagating in the direction opposite to the propagation direction and corresponding to that part of the noise generated by the amplifier equipment transmitted in the direction opposite to the propagation direction. It also includes a coupler for sampling on the downstream side of the amplifier equipment relative to the propagation direction part of the power of an optical signal propagating in the propagation direction and corresponding to the optical signal after amplification by the amplifier equipment superimposed on that part of the noise generated by the amplifier equipment and transmitted in the propagation direction. It assesses the signal-to-noise ratio of the amplifier equipment from the optical powers sampled as above.

REFERENCES:
patent: 5013907 (1991-05-01), Bateman
patent: 5293545 (1994-03-01), Huber
patent: 5299048 (1994-03-01), Suyama
Starvos Iezekiel et al, "Scattering Parameter Characterization of Microwave Optoelectronic Devices and Fiber-Optic Networks", IEEE Microwave and Guided Wave Letters, vol. 1, No. 9, Sep. 1991, pp. 233-235.
French Search Report FR 9303674.

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