A higher-order-mode erbium-doped-fiber amplifier.
We demonstrate the first erbium-doped fiber amplifier operating in a single, large-mode area, higher-order mode. A high-power, fundamental-mode, Raman fiber laser operating at 1480 nm was used as a pump source. Using a UV-written, long-period grating, both pump and 1564 nm signal were converted to the LP(0,10) mode, which had an effective area of 2700 microm(2) at 1550 nm. A maximum output power of 5.8 W at 1564 nm with more than 20 dB of gain in a 2.68 m long amplifier was obtained. The mode profile was undistorted at the highest output power.
Nicholson
J W
JW
OFS Laboratories, 19 Schoolhouse Road, Suite 105, Somerset, NJ 08873, USA. jwn@ofsoptics.com
Fini
J M
JM
DeSantolo
A M
AM
Monberg
E
E
DiMarcello
F
F
Fleming
J
J
Headley
C
C
DiGiovanni
D J
DJ
Ghalmi
S
S
Ramachandran
S
S
D000669:Amplifiers, Electronic; D004871:Erbium; D007834:Lasers; D055100:Optical Fibers; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*
D004871:Erbium