Compact and low insertion loss (approximately 1.0 dB) Mach- Zehnder interferometer-synchronized arrayed-waveguide grating multiplexer with flat-top frequency response.
We have developed a compact Mach-Zehnder interferometer (MZI)-synchronized arrayed-waveguide grating (AWG) multiplexer with 40 100-GHz-spaced channels using 1.5-% Delta waveguides. This MZI-synchronized AWG has a chip size of only 35 x 28 mm(2), and a low insertion loss of 1.0 - 1.2 dB with a flat-top frequency response. This low insertion loss is achieved by i) installing spot-size converters at the ends of optical input and output waveguides, and ii) employing a narrow gap in a directional coupler at the junction of the MZI and AWG. This device exhibited other excellent characteristics including a wide 0.5-dB passband of more than 45 GHz and a low adjacent crosstalk of less than -35 dB.
Shibata
Tomohiro
T
NTT Photonics Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan. tshibata@aecl.ntt.co.jp
Kamei
Shin
S
Kitoh
Tsutomu
T
Tanaka
Takuya
T
Kohtoku
Masaki
M
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008027:Light; D055096:Optical Devices; D012542:Scattering, Radiation