Device and method for measuring the attenuation of optical waveguides and system and method for bidirectional attenuation measurement of optical waveguides

摘要

Multimode optical waveguide coupler for insertion and return loss measurement of optical waveguides comprising a housing (15) in which are arranged: - a first interface (5) for connecting a first optical waveguide (1); - A second interface (6) for connecting a second, to be tested optical waveguide (2); - a first means for collimation (7), which parallelises the light beams from the first interface (5), and a second means for collimation (8), which parallelises the light beams from the second interface (6); - A first integrated receiver diode (10) for generating an electrical signal proportional to the incident light power of the diode; - A second integrated receiver diode (9) for generating an electrical signal proportional to the incident light power of the diode; and - a beam splitter (11) arranged between the first interface (5) and the second interface (6), which transmits an incident, parallel light beam (31) from the first optical waveguide (1) into a parallel light beam (11) passing through the beam splitter (11). 32) and in a parallel to the first receiver diode (10) projected parallel light beam (33), and the one incident parallel light beam (41) from the second optical fiber (2) in a through the beam splitter (11) passing through the parallel light beam (42) and subdivided into a parallel light beam (43) projected onto the second receiver diode (9), the active areas (13) for determining the incident light power in the integrated receiver diodes (9, 10) having an equal or larger cross sectional area than the largest core cross sectional area of the having beams parallelized by the means for collimation (7, 8).