Optical fiber test apparatus with combined light measurement and fault detection

An optical fiber test apparatus, comprising:

• an optical power meter operable to detect light at a predetermined wavelength, the optical power meter comprising a photodiode;
• a laser source operable to generate a visible laser beam, the laser source comprising a laser driver circuit and a laser diode;
• an optical fiber extending between a first end and a second end;
• a diplexer, the diplexer comprising a first optical connector and coupled to the optical power meter, the laser source, and the first end of the optical fiber, the diplexer coupled to the first end of the optical fiber through the first optical connector;
• a second optical connector coupled to the second end of the optical fiber and comprising a test port;
• and
• an optical fiber connector comprising a ferrule, the optical fiber connector coupled to the first end of the optical fiber with the first end of the optical fiber disposed within the ferrule of the optical fiber connector, the optical fiber connector coupling the first end of the optical fiber to the first optical connector when the ferrule of the optical fiber connector is inserted into the first optical connector, wherein the first optical connector comprises an optical fiber stub, and wherein the first end of the optical fiber is optically aligned with the optical fiber stub when the ferrule of the optical fiber connector is inserted into the first optical connector,
• wherein the diplexer is operable to transmit light at the predetermined wavelength from the second optical connector to the optical power meter and transmit the visible laser beam from the laser source to the second optical connector.