Improving the Performance of Optical Phased Array by Reducing Relative Intensity Noise of Optically Injection-Locked Laser Arrayopen access
- Authors
- Nguyen, Anh-Hang; Sung, Hyuk-Kee
- Issue Date
- 1-Nov-2022
- Publisher
- MDPI
- Keywords
- optical injection locking; laser relative intensity noise; optical phased array; optical signal-to-noise ratio
- Citation
- PHOTONICS, v.9, no.11
- Journal Title
- PHOTONICS
- Volume
- 9
- Number
- 11
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/30640
- DOI
- 10.3390/photonics9110868
- ISSN
- 2304-6732
- Abstract
- Relative intensity noise (RIN) is an important factor that determines the performance of optical phased arrays (OPA) that are configured using semiconductor lasers as light emission sources. This study proposes a method of improving the optical signal-to-noise ratio (OSNR) of an OPA by reducing the RIN and using high coherence of optically injection-locked (OIL) laser arrays. We numerically demonstrated a laser RIN reduction of 22.7 dB by the OIL laser compared to a free-running laser. We achieved an OPA RIN reduction of 13.2 dB by combining the coherent outputs with the uncorrelated noise of 21 OIL lasers, compared to a single OIL laser RIN. Consequently, we demonstrated an OPA OSNR increase of approximately 13.8 dB based on the OIL-based OPA compared to that of the conventional noise-correlated OPA configuration. Additionally, we confirmed the maintenance of OPA OSNR improvement during OPA operations.
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Collections - College of Engineering > School of Electronic & Electrical Engineering > 1. Journal Articles
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