Device and method to measure the DMD and other parameters of a multicore optical fiber

摘要

Apparatus and method of simultaneously measuring a parameter of a plurality of cores in at least one optical fiber. An input tester at a first end of the test fiber has a plurality of tester signal inputs with a geometry substantially matching at least a portion of the core geometry of the fiber. At least one test input signal source coupled to the plurality of tester signal inputs. A signal measuring device is alignable at a second end of the fiber to measure the output of the test input signal. The input tester may include a tapered multicore coupler or a laser having a shield with apertures disposable between the laser and the fiber. In the latter case, a lens may be disposed between the shield and the fiber to project light from the laser that passes through the apertures onto the end of the fiber.

主权项

1. A method of simultaneously measuring at least one parameter of a plurality of cores in at least one optical fiber to be tested, comprising the steps of:
a) preparing an input tester having i) a plurality of tester signal inputs with a geometry substantially matching at least a portion of the core geometry of the fiber to be tested, and ii) at least one test input signal source coupled to the plurality of tester signal inputs; b) aligning the plurality of tester signal inputs with the corresponding plurality of cores in the fiber to be tested at a first end of the fiber to be tested; c) firing at least one test input signal from the test input signal source through the input tester to the plurality of cores in the fiber being tested; and d) measuring the output of the test input signal emerging from a second end of the fiber being tested, wherein the input tester includes a laser and the tester signal inputs include apertures in a shield disposable between the laser and the first end of the fiber to be tested.