Ultrabroadband beam splitter with matched group-delay dispersion.
We present a general design strategy for a broadband thin-film beam splitter with matched group-delay dispersion. By taking the substrate dispersion into account in the coating design, any combination of input and output can show the same dispersion for transmission and reflection. As a specific implementation, an ultrabroadband 50:50 beam splitter from 600 to 1500 nm for femtosecond laser applications was designed, fabricated, and characterized.
Kim
J
J
Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. jungwon@mit.edu
Birge
Jonathan R
JR
Sharma
V
V
Fujimoto
J G
JG
Kärtner
E X
EX
Scheuer
V
V
Angelow
G
G