Open AccessCascaded AMZ triplets: a class of demultiplexers having a monitor and control scheme enabling dense WDM on Si nano-waveguide PICs with ultralow crosstalk and high spectral efficiency
Author(s) -
Tomoyuki Akiyama,
Shunri Oda,
Yasuhiro Nakasha,
A. Hayakawa,
Shinsuke Tanaka,
Yu Tao,
Takeshi Hoshida
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.410379
Subject(s) - wavelength division multiplexing , transceiver , demultiplexer , multiplexing , computer science , crosstalk , optics , waveguide , channel spacing , optical add drop multiplexer , spectral efficiency , photonic integrated circuit , photonics , optoelectronics , optical performance monitoring , electronic engineering , materials science , physics , multiplexer , channel (broadcasting) , telecommunications , wavelength , engineering , cmos
We propose a class of wavelength-division multiplexing (WDM) demultiplexers having a novel monitor and control scheme enabling dense WDM on Si nano-waveguide (NW) photonic integrated circuits (PICs), which had been impossible due to the critically small fabrication tolerance of the extremely miniaturized waveguide structure. With a computer simulation, we show our proposed demultiplexers enable crosstalk in the range of -50 to -40 dB, flat-topped spectrum for high spectral efficiency, and channel counts as large as 64. We have experimentally evaluated the validity of this type of demultiplexers by using a 4-ch WDM demultiplexer, which has shown total crosstalk of < -49 dB as a result of fully automatic control of heaters. This technology is expected to drastically shrink the size of dense WDM transceivers, paving the way for future sustainable scalability in the capacity of optical transceiver systems.