Title:Design and Performance Analysis of Strip Photonic Waveguide with
Coating Layer for Multimode Propagation
Volume: 16
Issue: 3
Author(s): Veer Chandra*
Affiliation:
- Department of Electronics and Communication Engineering, SRM Institute of Science and Technology, Kattankulathur,
India
Keywords:
Strip photonic waveguide, aluminum nitride (AlN), propagation loss, germanium, coating, multimode.
Abstract:
Introduction: Photonic devices play a pivotal role in the realm of high-speed data communication
due to their inherent capability to expedite the transfer of information. Historically, research
efforts in this domain have predominantly concentrated on investigating the fundamental
mode propagation within photonic waveguides.
Methods: This study diverges from the conventional approach by delving into the untapped potential
of higher-order modes in addition to the fundamental mode of propagation. The exploration of these
higher-order modes opens up new possibilities for optimizing and enhancing the performance of photonic
devices in high-speed data communication scenarios. As a distinctive aspect of this study, various
coating materials were scrutinized for their impact on both fundamental and higher-order mode
propagation. The materials under examination included AlN (aluminum nitride), Germanium, and
Silicon. These materials were chosen based on their unique optical properties and suitability for influencing
different modes of light propagation. The findings from the study reveal that applying a
coating of germanium demonstrates advantageous characteristics, particularly in terms of reduced
signal loss, even when considering higher-order modes of propagation within photonic devices.
Results: In this context, the results indicate that germanium-coated waveguides exhibit notably low
propagation losses, with measurements as minimal as 0.25 dB/cm. This low level of loss is particularly
noteworthy, especially when the waveguide has a width of 550 nm and is coated with a thickness
of 50 nm. The dimensions and coating specifications play a crucial role in determining the efficiency
of light transmission within the waveguide.
Conclusion: The fact that the propagation loss is substantially low under these conditions suggests
that the germanium-coated waveguide, even when considering higher-order modes of light propagation,
can effectively maintain the integrity of the optical signal.
