Resonant excess quantum noise in focused-gain lasers.
We demonstrate that the transverse eigenmodes in a waveguide that combines a parabolic index guide with a Gaussian gain guide can be highly nonorthogonal. The excess-noise factor K that arises from this nonorthogonality exhibits resonant features with maximum values that can easily reach K approximately 400 . This simple model applies directly to stable-cavity microchip lasers with focused gain.
N J
NJ
van Druten
M P
MP
van Exter
J P
JP
Woerdman