InP-based compact transversal filter for monolithically integrated light source array.
We developed an InP-based 4x1 transversal filter (TF) with multi-mode interference couplers (MMIs) as a compact wavelength multiplexer (MUX) 1700 μm x 400 μm in size. Furthermore, we converted the MMI-based TF to a reflection type to obtain an ultra-compact MUX of only 900 μm x 50 μm. These MUXs are made with a simple fabrication process and show a satisfactory wavelength filtering operation as MUXs of monolithically integrated light source arrays, for example, for 100G bit Ethernet.
Yuta
Y
Ueda
Takeshi
T
Fujisawa
Kiyoto
K
Takahata
Masaki
M
Kohtoku
Hiroyuki
H
Ishii