The main performance indicators of Photovoltaic energy connector are: insertion loss and return loss.

1. Insertion loss

Insertion loss refers to the decibels of the ratio of the output optical power to the input optical power after the optical signal in the optical fiber passes through the Photovoltaic energy connector.

The expression formula is: IL=-10lg (output optical power/input optical power), unit: decibel (dB).

During the use of Photovoltaic energy connector, the smaller the insertion loss, the better.

The main factors that affect the insertion loss are: fiber surface cleanliness, axis inclination, lateral offset, and fiber gap.

2. Return loss

Return loss, also known as retroreflective loss, refers to the decibels of the ratio of the retroreflected optical power to the input optical power at the fiber connection.

The expression formula is: RL=-10lg (retroreflected optical power/input optical power), unit: decibel (dB).

During the use of Photovoltaic energy connector, the larger the return loss, the better, so as to reduce the impact of reflected light on the light source system.

The main factors that affect the return loss of the Photovoltaic energy connector are: the cleanliness of the optical fiber surface, the polishing quality of the end face, the amount of unevenness of the optical fiber, and the end face polishing method (PC and APC).