Coherence collapse and low-frequency fluctuations in quantum-dash based lasers emitting at 1.57 mum.
Optical feedback tolerance is experimentally investigated on a 600-mum-long quantum-dash based Fabry-Pérot laser emitting at 1.57mum. While quantum-dashes are structurally intermediate to quantum-wells and quantum-dots, the observed behaviour is distinctly like that of a quantum-well based laser but with greater stability. Coherence collapse and low-frequency fluctuation regimes are observed and are reported here. The onset of the coherence collapse regime is experimentally determined and is found to vary from -29 dB to -21 dB external feedback level when increasing the current from twice to nine times the threshold current.
Azouigui
S
S
Kelleher
B
B
Hegarty
S P
SP
Huyet
G
G
Dagens
B
B
Lelarge
F
F
Accard
A
A
Make
D
D
Le Gouezigou
O
O
Merghem
K
K
Martinez
A
A
Zou
Q
Q
Ramdane
A
A