Device for measuring the attenuation of optical waves on optical

Details Device for measuring the attenuation of optical waves on optical Device for measuring the attenuation of optical waves on optical

1978-11-21

1981-03-24

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356407, G01N 2184

Patent

active

042577071

ABSTRACT:
In order to be able to measure the attenuation of a lightwave guide fiber definitely and reproducibly, it is suggested to offer a mode distribution to the lightwave guide to be measured which corresponds with the "steady state" of a very long fiber. A mode mixer and a mode stripper is for this purpose connected in series with the lightwave guide to be measured. All core modes and leakage- and jacket modes are excited in the mode mixer. In the mode stripper the jacket- and leakage modes are again stripped (absorbed) so that a mode distribution, comparable to the "steady state", remains.

REFERENCES:
patent: 3910701 (1975-10-01), Henderson et al.
Meinke-Gundlach: Taschenbuch der Hochfrequenztechnik, Berlin, Gottingen, Heidelberg, 1962, pp. 312-322.
Elektrisches Nachrichtenwesen, Bd. 51, No. 4, 1976, pp. 261-268.
Electronics & Communication in Japan, vol. J59-C, No. 2, 1976, pp. 122-130.
Feingeratetechnik, vol. 21, No. 4, 1972, pp. 151-155.
"Optical-Fiber Impulse-Response Measuring System", IEEE Transactions on Instrumentation & Measurement, vol. IM25, #4, pp. 401-406, Dec. 1976, Dannwolf et al.
"Fibers Simple Testing Methods Give Users a Feel for Cable Parameters", Chesler et al., Electronics, Aug. 5, 1976, pp. 90-129.

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