Compact OWC Receiver: Micro-Lens and PD Array on Glass Interposer

In this article, we propose a compact optical wireless receiver based on micro-lens and photodiode array flip-chipped on a glass interposer. With simulation models and experiments, we verify the performance of two optical wireless communication receivers assembled based on this structure with gigabi...

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Bibliographic Details
Published in:Journal of lightwave technology 2023-12, Vol.41 (23), p.7169-7176
Main Authors: Song, Yuchen, Wolny, Mikolaj, Li, Chenhui, Mekonnen, Ketemaw Addis, Correa, Carina Ribeiro Barbio, Spiegelberg, Marc, Tangdiongga, Eduward, Raz, Oded
Format: Article
Language:English
Subjects:
Apertures
Arrays
Chipping
Collection
discrete multitone modulation
Efficiency
field of view
flip chip
Flip-chip devices
glass interposer
High speed
High-speed optical techniques
Lenses
light collection efficiency
micro-lens array
Microlenses
Optical arrays
Optical receivers
Optical wireless
Optical wireless receiver
photodiode array
Photodiodes
Wireless communications
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Summary:In this article, we propose a compact optical wireless receiver based on micro-lens and photodiode array flip-chipped on a glass interposer. With simulation models and experiments, we verify the performance of two optical wireless communication receivers assembled based on this structure with gigabit and high-speed photodiodes. First, co-integrated gigabit photodiodes and micro-lenses indicate that micro-lenses can deliver a 3.5 dB gain of light collection efficiency to the gigabit photodiode array while keeping the field of view larger than \pm18 degrees. Besides, a 5.5 Gbps maximum throughput has been verified by this optical wireless communication receiver with discrete multitone modulation. Moreover, co-integrated high-speed photodiodes and micro-lenses prove that micro-lenses realize a 26.6 dB improvement in light collection efficiency, enabling a 10 Gbps error-free connection using as little as −0.5 dBm transmission power. Those results conclude that the co-integration of micro-lenses on the photodiode array can enhance the light collection efficiency of the photodiode array while keeping a larger field of view, providing a high-performance, low-cost solution for the receiver of optical wireless links.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2023.3285154