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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Optical phased array power penalty analysis.

Jing M Tsui¹, Charles Thompson, Jeffrey M Roth

¹University of Massachusetts-Lowell, Lowell, MA 01854, USA. Jing_Tsui@student.uml.edu

|June 18, 2009

Summary

Optical phased arrays for beam steering increase power penalties with larger angles, aperture sizes, and data rates. For wide-angle steering, penalties rise significantly at higher data rates like 10 Gb/s.

Area of Science:

Optical engineering
Telecommunications

Background:

Optical phased arrays (OPAs) are crucial for wide-angle beam steering in optical communication systems.
Understanding performance limitations, such as power penalties, is essential for system design.

Purpose of the Study:

To investigate the power penalty associated with optical phased arrays for wide-angle beam steering.
To analyze the impact of key parameters on signal integrity.

Main Methods:

Simulated digital lightwave signals transmitted through OPAs.
Evaluated power penalties based on varying aperture size, data rate, modulation format, and diffraction angle.

Main Results:

Power penalties increase with larger steering angles, aperture sizes, and data rates.

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At 10 degrees steering, 10-cm aperture, and 2.5 Gb/s, the penalty is ~1.0 dB for OOK and DPSK.

At 10 Gb/s, penalties increase to 7.7 dB (OOK) and 7.8 dB (DPSK).

Conclusions:

Wide-angle beam steering using OPAs introduces significant power penalties, especially at higher data rates.
Modulation format (OOK, DPSK) has a minor impact on power penalty compared to angle and data rate.
Design considerations for OPAs must account for these power penalties to ensure reliable optical communication.