Device for detecting optical loss

A device for detecting optical loss, comprising:

• a first light-guiding cable having a first end and a second end, wherein the first end of the first light-guiding cable is connected with a light generator;
• a second light-guiding cable having a third end and a fourth end;
• a light detector connected with the fourth end of the second light-guiding cable;
• at least one angle-adjusting bracket provided with the second end of the first light-guiding cable and the third end of the second light-guiding cable and configured to respectively adjust the second end of the first light-guiding cable and the third end of the second light-guiding cable to face toward a semiconductor light-guiding chip;
• and
• a first emission microscope whose image-capturing surface faces toward the semiconductor light-guiding chip, wherein when the light generator generates a light beam, the light beam is emitted to the semiconductor light-guiding chip through the first light-guiding cable, the semiconductor light-guiding chip guides the light beam to the second light-guiding cable, the light detector receives the light beam through the second light-guiding cable to retrieve energy of the light beam, and the first emission microscope captures a leakage position of the semiconductor light-guiding chip where the light beam is emitted from the semiconductor light-guiding chip.