Double-core erbium-doped optical fiber for simultaneously amplifying C wave band and L wave band

The invention discloses a dual-core erbium-doped optical fiber for simultaneously amplifying a C wave band and an L wave band, and relates to the technical field of erbium-doped optical fibers. The dual-core erbium-doped optical fiber comprises a first fiber core, a second fiber core and an outer cladding layer; the erbium-doped concentration of the first fiber core for amplifying the C wave band is different from the erbium-doped concentration of the second fiber core for amplifying the L wave band; the outer wrapping layer wraps the outer layers of the first fiber core and the second fiber core; the first fiber core and the second fiber core form a single-mode double-core optical fiber structure; through the first fiber core and the second fiber core which are different in erbium-doped concentration, amplification of signal light of the C wave band and the L wave band in the same erbium-doped fiber is achieved. 本发明公开了一种用于C波段和L波段同时放大的双芯掺铒光纤，涉及掺铒光纤技术领域，包括第一纤芯、第二纤芯、外包层；用于放大C波段的第一纤芯的掺铒浓度与用于放大L波段的第二纤芯的掺铒浓度不同；所述的