High-power, low-noise, Yb-doped, cladding-pumped, three-level fiber sources at 980 nm.
We present results on a high-power, cladding-pumped, Yb-doped fiber emitting at 977 nm in laser and ampllified-spontaneous-emission source configurations. We obtained up to 1.4 W of fiber-coupled, single-mode output power and slope efficiency as high as 68%. To our knowledge these are the highest powers efficiencies achieved from a single-mode fiber laser at approximately 980 nm and the first demonstrated results on a high-power amplified-spontaneous-emission source in this wavelength range. High power and high slope efficiency are achieved by using a high numerical aperture (> 0.7), a jacketed air-clad fiber, and a high-brightness pump source. Both types of sources exhibit relative intensity noise below -130 dB/Hz and are thus suitable for a wide range of applications.
Selves
R
R
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom.
Sahu
J K
JK
Fu
L B
LB
Jang
J N
JN
Nilsson
J
J
Grudinin
A B
AB
Ylä-Jarkko
K H
KH
Alam
S A
SA
Turner
P W
PW
Moore
J
J