A compact and broadband optical 90° hybrid based on a 2×4 multimode interference (MMI) coupler using the Si3N4 technology is proposed. The effects of MMI length, width, and wavelength on optical power transmission are investigated. With the length of 217 μm for the 2×4 MMI coupler, this optical 90° hybrid shows a maximum phase error of 5°, an excess loss of 1 dB, and a transmission imbalance of 1 dB over a 75-nm-wide wavelength range.
We report the demonstration of Si-based waveguide Ge1-xSnx photodetector (PD) at L-band (1565-1625 nm), U-band (1625-1675 nm), and 2μm light detection, optical and electrical properties are studied by using simulation models. With introduction of 4.5% Sn into Ge, the GeSn waveguide PD with evanescent coupling exhibits a high responsivity of 1.25 A/W, dark current is lower than 12 nA. This work provides a new choice for future infrared detection, beneficial to needs of broadband spectrum communication, and compatible with CMOS circuits.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.