Endoscope, disposable endoscope system and light source for endoscope

An endoscope, comprising:

• a first component;
• a second component having a proximal end and a distal end, the proximal end being coupled to the first component;
• a light source integrated in the first component, light source comprising at least one laser and a converter, the at least one laser emits primary light, the converter converts the primary light at least partially into secondary light, the secondary light having a different wavelength than the primary light;
• an image capturing element arranged at the distal end;
• and
• a light guide comprising at least one optical fiber extending through the second component,
• wherein the converter is coupled to the proximal end such that the primary and secondary light is injected into the light guide so that the at least one optical fiber conducts the primary and secondary light from the proximal end to the distal end and emits the primary and secondary light at the distal end, and
• wherein the at least one optical fiber comprises a step-index glass optical fiber, and wherein the step-index glass optical fiber comprising a glass composition that is free, except for unavoidable traces, of a material selected from a group consisting of lead, heavy metals, antimony, arsenic, Cr(VI), and any combinations thereof.