Concave grating and convex mirror double dispersion spectrograph for optical network applications.
The concave grating stationary anastigmatic spectrograph has been modified into a novel retroreflective scheme by introducing a convex mirror concentric to the intermediate image. This provides double dispersion, diffraction-limited imaging of a long entrance slit, and substantial compensation of the stationary chromatic astigmatism. One can realize 140 independent multi/demultiplexers with 160 channels each simultaneously in the described device for optical network applications. Ray-tracing spot diagrams are presented.
Churin
E G
EG
Bayvel
P
P
Smirnitskii
V B
VB
Timofeev
F N
FN
Midwinter
J E
JE