1.
Opt Lett
; 41(11): 2588-91, 2016 Jun 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-27244421
RESUMEN
We demonstrate a few-mode erbium-doped fiber amplifier employing a mode-selective photonic lantern for controlling the modal content of the pump light. Amplification of six spatial modes in a 5 m long erbium-doped fiber to â¼6.2 dBm average power is obtained while maintaining high modal fidelity. Through mode-selective forward pumping of the two degenerate LP21 modes operating at 976 nm, differential modal gains of <1 dB between all modes and signal gains of â¼16 dB at 1550 nm are achieved. In addition, low differential modal gain for near-full C-band operation is demonstrated.