Duplex optical power loss measurement using an adaptor device

A test arrangement, for use in combination with a light source device for measuring an optical power loss of a duplex optical-fiber device under test (DUT), the test arrangement comprising:

• a test instrument comprising a power meter device, the power meter device comprising:
• an input duplex connector interface for interfacing towards a first DUT for optical power measurement;
• and
• two optical detectors that respectively detect light out of optical fibers of two optical-fiber ferrules to be received at said input duplex connector interface;
• and
• an optical-fiber expansion device to be connected between the power meter device and the DUT for optical power measurement and comprising:
• a first duplex connector interface for interfacing with an input connector interface of the power meter device, the first duplex connector interface defining a fixed first spacing between two optical-fiber ferrules that is compatible with the input connector interface of the power meter device;
• a second duplex connector interface for interfacing with a duplex connector interface of the first DUT, the second duplex connector interface defining a fixed second spacing between two optical-fiber ferrules that is compatible with the duplex connector interface of the first DUT, said second spacing being different from said first spacing;
• and
• two optical fibers each extending between one ferrule of the first duplex connector interface and one ferrule of the second duplex connector interface and adapting an optical fiber spacing between the first spacing on a first end and the second spacing on a second end, wherein the optical fibers have a core diameter and a numerical aperture that are greater than those of an optical fiber in the duplex connector interface of the first DUT.

A connector cartridge, for use in combination with a power meter instrument and a light source instrument for measuring an optical power loss of a device under test (DUT), the connector cartridge comprising:

• a cartridge casing, sized to be at least partially received in a cartridge receiving cavity extending within the power meter instrument, the cartridge casing having an inner end and an outer end;
• the outer end being provided with a connector adapter that receives a DUT connector interface from the DUT and having a connection format that is compatible with the DUT connector interface;
• an optical fiber cable housed within the cartridge casing and comprising a first connector interface fixed first spacing at said inner end and a second connector interface defining a fixed at said outer end and an optical fiber extending therebetween and adapting an optical fiber spacing between the power meter instrument and the light source instrument;
• the first connector interface interfaces with an input connector interface of the power meter instrument;
• the second connector interface being received in one side of said connector adaptor and interfaces with said DUT connector interface;
• and
• the optical fiber having a core diameter and a numerical aperture that are greater than those of the optical fiber in the DUT connector interface and less than those of the optical fiber in the input connector interface of the power meter instrument.