Optical pulse reflectometer

Details Optical pulse reflectometer Optical pulse reflectometer

G - Physics

01

M

G01M 11/00 (2006.01)

Patent

CA 2273336

The object of the invention is to improve the sensitivity of an optical pulse reflectometer (10) without having to increase the transmitting power of the light source (30). For this purpose, instead of a static beam splitter, such as a semi-opaque reflector or 2x2 directional coupler, use is made of an optical switch (40) for the selective connection of the light source (30) to the associated object under test (60) and for the selective connection of the object under test (60) to the associated photodetector (70). In this manner, it is possible to improve the power utilization and thus the sensitivity of conventional optical pulse reflectometers to a very great extent.

La présente invention vise à améliorer la sensibilité d'un réflectomètre optique dans le domaine temps (10) sans accroissement de la puissance d'émission de la source lumineuse (30). Pour ce faire, il est proposé d'utiliser, à la place d'un diviseur statique de faisceau, un miroir semi-transparent ou 2*2-richtkopper par exemple, un filtre séparateur (40) optique pour cibler, d'une part, la source lumineuse (30) sur l'objet de mesure (60) associé et, d'autre part, ledit objet de mesure (60) sur le photodétecteur (70) associé. Cela permet d'exploiter beaucoup mieux les possibilités et d'améliorer nettement la sensibilité des réflectomètres optiques classiques dans le domaine temps.

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