Session Index

S2. Optical Waveguides and Communications

Optical Waveguides and Communications V
Sunday, Dec. 4, 2022  09:00-10:45
Presider: Nai-Hsiang Sun、Yu-Hsiang Cheng
Room: B1 A002
09:00 - 09:15
Manuscript ID.  0044
Paper No.  2022-SUN-S0205-O001
Wei-Cheng Fan Fiber-FSO-5G NR Convergence Using Single Optical Carrier Modulation and Coherent Multi-Carrier Optical Beating
Wei-Cheng Fan, Yu-Shen Lin, Cheng-Jun Lin, Hsu-Hung Huang, Hai-Han Lu, National Taipei University of Technology (Taiwan)

We demonstrated a fiber-FSO-5G NR MMW/sub-THz convergence system uses single optical carrier modulation to effectively suppress power fading induced by fiber chromatic dispersion and interferences induced by beating between multiple optical carriers, as well as coherent multi-carrier optical beating to effectively eliminate nonlinear noises induced by incoherent multi-carrier optical beating. 20 Gb/s 16-QAM-OFDM in the 50-GHz MMW, 100-GHz sub-THz, and 150-GHz sub-THz bands through the fiber-FSO-5G NR convergence is successfully implemented.

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09:15 - 09:30
Manuscript ID.  0189
Paper No.  2022-SUN-S0205-O002
PO-CHENG SU Implementation of Pre-Emphasis Technique and ANN-NLE Equalizer for Back-to-Back Optical OFDM System
PO-CHENG SU, Fu-Kai Shih, Pouya Torkaman, Kai-Ming Feng, Shang-Hua Yang, National Tsing Hua University (Taiwan)

In this work, we experimentally demonstrated an optical OFDM system with pre-emphasis technique and artificial neural network nonlinear equalizer (ANN-NLE). Baseband signal is pre-emphasized and received signal is equalized by ANN-NLE to combat frequency fading and phase distortion issues. The result showed error-free BER without FEC technique in back-to-back scheme.

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09:30 - 09:45
Manuscript ID.  0217
Paper No.  2022-SUN-S0205-O003
Fu-Kai Shih Method of Mathematical Approximation on Mach-Zehnder Modulator Based on Terahertz Wireless System
Fu-Kai Shih, Po-Cheng Su, Pouya Torkaman, Kai-Ming Feng, Shang-Hua Yang, National Tsing Hua University (Taiwan)

In this study, we developed a mathematical representation of the Mach-Zehnder Modulator (MZM) that can simulate the actual signal using a real-time oscilloscope recording. It is possible to model OOK and OFDM signals and determine the nonlinear impact of MZM on signal, which will be helpful for channel estimation in the Terahertz communication band.

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09:45 - 10:00
Manuscript ID.  0468
Paper No.  2022-SUN-S0205-O004
Chia-Ling Tsai Study of Higher Gain Chromium-Doped Fiber by Smaller Core Diameter
Chia-Ling Tsai, National Chung Hsing University (Taiwan); Kai-Chieh Chang, National Taiwan University (Taiwan); Chun-Nien Liu, National Chung Hsing University (Taiwan); Sheng-Lung Huang, National Taiwan University (Taiwan); Wood-Hi Cheng, National Chung Hsing University (Taiwan)

We demonstrate the higher coupling efficiency and pump signal conversion efficiency (PSCE) by the LHPG system with an AI monitoring system. Compared with the core diameter of 15-µm SMCDCCF, the CE, PSCE were improved by 3.3 times, and gross gain were improved by 1.3 times. By developing a small diameter SMCDCCF is essential for practical use in the next-generation broadband fiber amplifier applications.

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10:00 - 10:15
Manuscript ID.  0475
Paper No.  2022-SUN-S0205-O005
Guan-Ting Lu Harmonic Microwave Down-Conversion Using Semiconductor Lasers at Period-One Nonlinear Dynamics
Guan-Ting Lu, Chin-Hao Tseng, Sheng-Kwang Hwang, National Cheng Kung University (Taiwan)

A harmonic microwave down-converter based on stabilized period-one (P1) nonlinear dynamics of
semiconductor lasers subject to external optical injection is proposed and experimentally demonstrated. The
proposed system has advantages of wide tunability, broad conversion bandwidth, and high operating frequency.

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10:15 - 10:30
Manuscript ID.  0482
Paper No.  2022-SUN-S0205-O006
Ping-Chun Hu Implementation of Error Correction in Quantum Communication for Differential-Phase-Shift Quantum Key Distribution
Ping-Chun Hu, Yuh-Renn Wu, National Taiwan University (Taiwan)

This study implemented a reverse reconciliation scheme with low-density parity-check (LDPC) codes into our quantum key distribution (QKD) simulator to correct the errors generated in the (QKD) used in quantum communication. The results show that the error correction strategy with sparse parity-check matrices defined by IEEE standards satisfies the requirement of reconciliation in differential phase shift QKD.

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10:30 - 10:45
Manuscript ID.  0707
Paper No.  2022-SUN-S0205-O007
Zhen-Hua Wang >65GHz High-Speed and Low-Pattern Dependence Modulation by QWI SOA-integrated EAM
Zhen-Hua Wang, Yen-Hsiang Chang, Yang-Jeng Chen, Rih-You Chen, Po-Wei Huang, National Sun Yat-sen University (Taiwan); Wei Lin, LandMark Optoelectronics Corporation (Taiwan); Yi-Jen Chiu, National Sun Yat-sen University (Taiwan)

Semiconductor optical amplifier (SOA) integrated electroabsorption modulators (EAM) for both high speed and low-pattern dependence modulation has been demonstrated. SOA/EAM integration was realized by impurity-free vacancy diffusion (IFVD) quantum well intermixing (QWI) technology, which is used for matching the bandgap (wavelength) between devices. Therefore, the complementary saturation properties of SOA and EAM in the timely carrier dynamic response can be utilized for pattern insensitive and thus high speed modulation.

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