Quartz end cap and laser output head

The embodiment of the utility model discloses a quartz end cap and a laser output head. The quartz end cap comprises a main body and a doping layer. The main body comprises an input end face and an output end face which deviate from each other, the doping layer wraps the part between the input end face and the output end face in the main body, and the side, away from the main body, of the doping layer is a glue joint side face; a refractive index of the body is greater than a refractive index of the doped layer. According to the embodiment of the utility model, the total reflection interface is formed between the main body and the doping layer, so that the return light can be totally reflected on the refractive index interface, thereby avoiding the failure of the fixing glue caused by heat generated at the fixing part of the quartz end cap due to the fact that the high return light hits the glue joint side surface of the quartz end cap; therefore, the problems of device damage and potential safety hazards in