Session Index

S2. Optical Waveguides and Communications

Optical Waveguides and Communications I
Friday, Dec. 2, 2022  13:00-15:00
Presider: Shien-Kuei Liaw、Shang-Hua Yang
Room: B1 A002
13:00 - 13:15 Award Candidate (Paper Competition)
Manuscript ID.  0187
Paper No.  2022-FRI-S0201-O001
Yi-Hua Pai GaN Based Yellow-green Micro-LED with Embedded Nanoporous GaN Distributed Bragg Reflectors Applied to Visible Light Communications
Yi-Hua Pai, Chien-Hsiang Chiu, Hsin Chiang, National Yang Ming Chiao Tung University (Taiwan); Min-Hsiung Shih, National Yang Ming Chiao Tung University (Taiwan), Academia Sinica (Taiwan); Hao-Chung Kuo, National Yang Ming Chiao Tung University (Taiwan)

In this report, the yellow-green micro-LEDs were fabricated, furthermore, through atomic layer deposition technology the leakage current was reduced. Moreover, a nanoporous GaN distributed Bragg reflector was also introduced to mitigate the quantum confined Stark effect, thereby improving the bandwidth and light extraction efficiency of the device. The device exhibits the highest -3dB bandwidth up to 442 MHz and a data transmission rate of 800 Mbit/s with on-off keying modulation, realizing a light illumination with a high data rate for visible light communication application.

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13:15 - 13:30 Award Candidate (Paper Competition)
Manuscript ID.  0436
Paper No.  2022-FRI-S0201-O002
Po-Lun Chen Amplifier-free High-speed Violet Laser Diode carrying 19.5 Gbit/s 32-QAM-OFDM
Po-Lun Chen, Pin-Wei Ho, Gong-Ru Lin, National Taiwan University (Taiwan)

The optimal operation condition of amplifier-free violet laser diode is achieved to successfully demonstrate over 30-cm BtB VLC transmission carrying 19.5 Gbit/s 32-QAM-OFDM signals by applying a pre-emphasis algorithm.

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13:30 - 13:45 Award Candidate (Paper Competition)
Manuscript ID.  0298
Paper No.  2022-FRI-S0201-O003
Yi-Wei Chang 25 Gbaud 16-QAM OFDM Transmission Using Waveguide MZM with External Modulation
Yi-Wei Chang, You-Cheng Lin, Da-Jhong Lin, Kuo-Fang Chung, Ding-Wei Huang, Gong-Ru Lin, National Taiwan University (Taiwan)

The electro-optical effect of the Mach-Zehnder modulator (MZM) is used to modulate the optical signal, and the high-frequency signal is used to increase the variation of the depletion region, thereby improving the modulation efficiency, reducing the bias voltage, and reducing the power loss. Operate at the best bias voltage point to get the best signal clarity and transmission efficiency after inputting the signal at 25 Gbaud 16 QAM-OFDM.

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13:45 - 14:00 Award Candidate (Paper Competition)
Manuscript ID.  0309
Paper No.  2022-FRI-S0201-O004
Kuan-Wei Hu The impact of mode beating noise on the 850-nm multi-mode VCSEL carrying 50-Gbit/s NRZ-OOK data stream
Kuan-Wei Hu, Cheng-Lin Tsou, Kun-You Huang, Hung-Bin Chang, Gong-Ru Lin, National Taiwan University (Taiwan)

The splitting of transverse modes causes mode-beating noise (MBN) of 850-nm multi-mode (MM) vertical-cavity surface-emitting laser (VCSEL) in the noise spectrum at 13 GHz and 33 GHz. The MBN degrades the surrounding sub-carriers signal noise ratio (SNR) and increases the overall noise amplitude. The MBN impacts the SNR, eye height of 850-nm MM VCSEL carrying 50-Gbit/s NRZ-OOK, and degrade the maximum transmission data rate.

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14:00 - 14:30
Manuscript ID.  0887
Paper No.  2022-FRI-S0201-I001
Invited Speaker:
Daping Chu
Polymer-Based Flexible Short-Reach Optical Interconnects
Daping Chu, Fengyuan Shi, Nikos Bamiedakis, Richard Penty, Ian White, University of Cambridge (UK)

Optical interconnects have attracted great interest in recent years for use in short-reach communication links in high-performance electronic systems such as data centres, data storage systems and supercomputers. Optical links provide significant performance advantages over conventional electrical interconnects, namely, higher bandwidth, lower power consumption at high data rates, immunity to electromagnetic interference, increased density and relaxed thermal management requirements. Flexible multimode polymer waveguides are particularly for use in board-level interconnects as they allow cost-effective formation of optical backplanes and high-speed chip-to-chip optical links directly integrated onto conventional printed circuit boards (PCBs).

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14:30 - 14:45 Award Candidate (Paper Competition)
Manuscript ID.  0414
Paper No.  2022-FRI-S0201-O005
Naseem . High Speed Avalanche Photodiode for Next Generation Ethernet Systems
Naseem ., Huang Yu-Cyuan, Syed Hasan Parvez, Zohauddin Ahmad, Jin Wei Shi, National Central University (Taiwan)

A novel In0.52Al0.48As based avalanche photodiode (APDs) is demonstrated for 106 Gbit/s PAM-4 applications. With a 14 um diameter, we can achieve high bandwidth (32GHz), high-responsivity (2.3A/W) with low dark current (200nA), high gain bandwidth product (GBP) 270 GHz and high saturation power under 11mA photocurrent at 0.9 Vbr operation.

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14:45 - 15:00 Award Candidate (Paper Competition)
Manuscript ID.  0573
Paper No.  2022-FRI-S0201-O006
Hsiu-Cheng Lin Optimization of Long Short Term Memory Neural Network (LSTMNN) based Visible Light Positioning (VLP) System to Enhance the Positioning Accuracy
Hsiu-Cheng Lin, Li-Sheng Hsu, Chi-Wai Chow, National Yang Ming Chiao Tung University (Taiwan); Chien-Hung Yeh, Feng Chia University (Taiwan)

We demonstrate a long short term memory neural network (LSTMNN) based visible-light-positioning (VLP) system to enhance the positioning accuracy. Different LSTMNN parameters are discussed to optimize the VLP system.

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