Session Index

S2. Optical Waveguides and Communications

Poster Session I
Saturday, Dec. 3, 2022  14:00-16:00
Room: 3F TR-A318
Award Candidate (Paper Competition)
Manuscript ID.  0264
Paper No.  2022-SAT-P0201-P001
Zi-Xian Wu High-Performance Planar-Type InGaAs/InP Avalanche Photodiode with Single Guard Ring
Zi-Xian Wu, Wen-Jeng Ho, Kai-Chieh Chen, Jheng-Jie Liu, National Taipei University of Technology (Taiwan)

High-performance planar-type InGaAs/InP avalanche photodiode (APD) with single guard ring was fabricated and characterized. Biasing at 0.9 breakdown voltage and room temperature, the dark current of 7.58 nA, multiplication gain of 10.5, capacitance of 0.52 pF, f3dB of 6 GHz, and the gain-bandwidth product of 72 GHz were obtained simultaneously in this work.

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Award Candidate (Paper Competition)
Manuscript ID.  0135
Paper No.  2022-SAT-P0201-P002
Kuo-Wei Lee Image-Resolved Phase Error Correction for MZI-Based Programmable Photonic Integrated Circuits
Cheng-Lin Lu, Kuo-Wei Lee, Aaron Liao, Bo-Xian Ke, Ming-Chang Lee, National Tsing Hua University (Taiwan)

We present an image-resolved approach to calibrate and correct phase errors of Mach-Zehnder-interferometer-based (MZI-based) programmable photonic integrated circuits. Via integration of grating couplers to tap waveguide power in the circuits, we can capture the phase information of key MZI elements in the circuits by investigating the light emitted from the grating couplers through an external infrared camera. All the thermo-optic phase tuners and the infrared camera are interfaced with a LabVIEW program, which can build a large-scale software-defined photonic integrated circuits.

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Award Candidate (Paper Competition)
Manuscript ID.  0043
Paper No.  2022-SAT-P0201-P003
Hsu-Hung Huang Phase Modulated Fiber FSO 5G Wireless Links
Hsu-Hung Huang, Wei-Cheng Fan, Yu-En Peng, Ru-De Lin, Hai-Han Lu, National Taipei University of Technology (Taiwan)

5G sub-6 GHz/MMW signal transmission over two-way phase-modulated fiber- FSO-wireless links employing remotely injection-locked DFB LDs as transceivers is proposed and successfully achieved. It shows a promising link because of its advancement for incorporating fiber trunk with FSO-5G wireless feeder, and also its advancement for adopting remote injection locking DFB LDs as transceivers to afford two-way 5G emerging services and applications.

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Award Candidate (Paper Competition)
Manuscript ID.  0080
Paper No.  2022-SAT-P0201-P004
Zi Wang Rayleigh Backscattering Mechanism Based C Band 1.46 KHz Linewidth Fiber Laser with Additional Spool of Standard Fiber
Zi Wang, National Taiwan University of Science and Technology (Taiwan); Dong-Chang Li, Shao Guan University (China); Geng-Ying Chen, Shien-Kuei Liaw, National Taiwan University of Science and Technology (Taiwan); Ya-Mei Yang, Bo-Heng Lee, Industrial Technology Research Institute (Taiwan); Hsiou-Hsin Tsai, College of Medicine, Taipei Medical University (Taiwan)

A simple, low-cost, single-longitudinal mode, C-band narrow-linewidth optical fiber laser is presented based on the methodology of the Rayleigh backscattering. In this paper, a 1552 nm fiber ring laser is developed, and single-mode fiber is added to compress the line width. The laser linewidth is 1.46 kHz. The optical signal-to-noise ratio is 59.86 dB, and the output power is 9.3 mW. The result shows that the proposed architecture can easily achieve single longitude-mode output by controlling the variable optical attenuator.

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Award Candidate (Paper Competition)
Manuscript ID.  0326
Paper No.  2022-SAT-P0201-P005
Yi-Hong Bai High-Efficiency InGaN Red Micro-LEDs for Visible Light Communication
Yi-Hong Bai, Yu-Ming Huang, Tzu-Yi Lee, National Yang Ming Chiao Tung University (Taiwan); Hao-Chung Kuo, Hon Hai Research (Taiwan)

In this study, we present a high-efficiency InGaN red micro-LED fabricated by the incorporation of the superlattice structure (SL), atomic layer deposition passivation, and a distributed Bragg reflector (DBR), exhibiting maximum EQE of 5.02% with a low efficiency droop corresponding to an injection current density of 112 A/cm2.

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Award Candidate (Paper Competition)
Manuscript ID.  0442
Paper No.  2022-SAT-P0201-P006
Ruei-Shen Wang Wavelength (de)multiplexer based on cascaded Mach-Zehnder interferometers and ring resonator arrays for CW-WDM applications
Ruei-Shen Wang, Chih-Hsien Chen, National Sun Yat-sen University (Taiwan); Chewn-Pu Jou, Taiwan Semiconductor Manufacturing Company (TSMC) (Taiwan); Yung-Jr Hung, National Sun Yat-sen University (Taiwan)

We employed a cascaded Mach-Zehnder interferometer for optical interleaving and an array of racetrack ring resonators for optical channelization. Their combination leads to a 100-GHz spaced wavelength (de)multiplexer for CW-WDM with an optical crosstalk as low as -24 dB.

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Award Candidate (Paper Competition)
Manuscript ID.  0486
Paper No.  2022-SAT-P0201-P007
Ting-Hsuan Kuo Silicon photonics with hybrid integrated III-V photodiodes
Ting-Hsuan Kuo, Liang-Xuan Lan, Yung-Jr Hung, National Sun Yat-sen University (Taiwan)

We demonstrate a “III-V photodiode over silicon grating coupler (PD-over-GC)” device concept that enables an overall responsivity of 0.964 and 0.367 A/W for 1D and 2D grating coupler, respectively. This is attributed to the fact that the upward optical directivity of 1D (2D) grating coupler achieves 0.9 (0.5), and the III-V photodiode chip accepts a wide range of optical incidence.

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Award Candidate (Paper Competition)
Manuscript ID.  0601
Paper No.  2022-SAT-P0201-P008
Hsin-An Chi Electro-Optically Tunable Microdisk Resonators with Graphene Electrodes
Hsin-An Chi, I-Chiang Cheng, Yi-Chung Lai, Yung-Yu Liang, Tzyy-Jiann Wang, National Taipei University of Technology (Taiwan)

We propose a high-efficiency electro-optically tunable LiNbO3 microdisk resonator using graphene electrodes and three-period outside-ring electrode design. The use of ultra-thin, transparent graphene electrodes not only increases the transmission of the resonant field but also reduces the device fabrication complexity and the fabrication cost. Besides, the proposed three-period outside-ring electrode design can avoid the cancellation of electro-optically induced phase and increase the electro-optic tuning efficiency. The electro-optic tuning rate of the proposed LiNbO3 microdisk resonator is as high as 9.92 pm/V for the TE mode.

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Award Candidate (Paper Competition)
Manuscript ID.  0648
Paper No.  2022-SAT-P0201-P009
Lin-Wei Liu Characterization of electro-absorption modulated lasers by heterodyne method
Lin-Wei Liu, National Taiwan University of Science and Technology (Taiwan)

The electro-absorption modulated laser (EML) are now widely used in the high speed transmission, because of its compactness and large bandwidth for transmission at very high data rate. We utilize the heterodyne detection technique to characterize the influence of low frequency drop for an EML. This method provides high resolution in the frequency domain and the measured responses contain both the amplitude and phase information.

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Award Candidate (Paper Competition)
Manuscript ID.  0675
Paper No.  2022-SAT-P0201-P010
Ming-Yun Tang Low-loss and broadband optical mode (de)multiplexer
Ming-Yun Tang, Chang-Hsuan Wu, Yung-Jr Hung, National Sun Yat-Sen University (Taiwan)

A low-loss (< 0.9 dB), low-crosstalk (< -17 dB), broadband (1500~1600 nm), and fabrication-tolerant optical mode (de)multiplexer is implemented on silicon-on-insulator. This device would enable a high-speed optical link with the combination of wavelength- and mode-division multiplexing schemes.

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Award Candidate (Paper Competition)
Manuscript ID.  0594
Paper No.  2022-SAT-P0201-P011
Shang-Yen Tsai Wide Field-of-View (FOV) Visible Light Communication (VLC) System using LED Light Panel and Machine Learning
Shang-Yen Tsai, Deng-Cheng Tsai, Chi-Wai Chow, National Yang Ming Chiao Tung University (Taiwan); Chien-Hung Yeh, Feng Chia University (Taiwan)

We demonstrate and characterize a wide field-of-view (FOV) visible-light-communication (VLC) system using LED light-panel and long-short-term-memory-neural-network (LSTMNN). At a distance of 1m, FOVs of ±70o and ±60o in horizontal and vertical directions can be achieved respectively.

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Award Candidate (Paper Competition)
Manuscript ID.  0826
Paper No.  2022-SAT-P0201-P012
Nien-Lin Hou Dispersion Engineering of Silicon Nitride Microresonators by the Design of Cladding Layers
Nien-Lin Hou, Shang-Pu Wang, Pei-Hsun Wang, National Central University (Taiwan)

In this work, we demonstrate silicon nitride micro-ring resonators with air cladding, hafnium oxide (HfO2) cladding, and SU8 polymer cladding and study the effect on waveguide dispersion. By using atomic layer deposition (ALD) HfO2 as the outside cladding layer, the waveguide dispersion can be tuned less in the normal regime at a wavelength of 1550 nm while polymer cladding provides the waveguide dispersion from anomalous to normal.

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Award Candidate (Paper Competition)
Manuscript ID.  0257
Paper No.  2022-SAT-P0201-P013
Li-Ying Liu Nanostructured Reflective Polarization Converter
Li-Ying Liu, Hong-Chang Huang, Chu-Wen Chen, Chii-Chang Chen, National Central University (Taiwan)

We demonstrate the nanostructural reflective polarization converter in silicon waveguide. The reflection of the device is 93.1% when the conversion length is 9.21um with 50 periods. The ultra-wide band width is 170nm at the central wavelength of 1.55um and it covers from 1.45um to 1.62um.

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Award Candidate (Paper Competition)
Manuscript ID.  0569
Paper No.  2022-SAT-P0201-P014
Shu-Cheng Lin Mitigation of Thermal Rollover in VCSEL based Time-of-Flight Sensing Application
Shu-Cheng Lin, National Yang Ming Chiao Tung University (Taiwan), iReach Corporation (Taiwan); Yun-Han Chang, National Yang Ming Chiao Tung University (Taiwan); Hsin-Chan Chung, iReach Corporation (Taiwan); Chi-Wai Chow, National Yang Ming Chiao Tung University (Taiwan)

To mitigate the thermal rollover in vertical-cavity-surface-emitting-lasers (VCSELs), gating-pulse operation with long turn-off time is proposed for the time-of-flight (TOF) sensing application. The rise and fall times can be reduced by >48%.

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Award Candidate (Paper Competition)
Manuscript ID.  0592
Paper No.  2022-SAT-P0201-P015
Hung-Yu Chen Groove-first Fabrication for Fiber-to-waveguide Edge Coupling
Hung-Yu Chen, Pei-Hsun Wang, Hung-Chun Liu, Yi-Xian Zhong, Kuan-Heng Chen, National Central University (Taiwan)

We propose flexible integration of groove process to passively edge-couple the optical fibers with on-chip integrated waveguides. By fabricating U-grooves before the waveguide formation, this groove-first process provides a universal platform for hybrid, large-scale photonics.

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Award Candidate (Paper Competition)
Manuscript ID.  0830
Paper No.  2022-SAT-P0201-P016
Duy Thanh Cu Design of a high-performance refractive index sensor based on guided-mode resonance
Duy Thanh Cu, Hong-Wei Wu, National Central University (Taiwan); Hung-Pin Chen, Taiwan Instrument Research Institute (Taiwan); Chien-Cheng Kuo, National Central University (Taiwan)

In this study, a simple-structured one-dimensional GMR grating that utilizes thin-film properties to enhance FOM is proposed. The electric field intensity in the grating is simulated to evaluate the enhancement of FOM. The waveguide grating structure achieves an extremely high FOM of 839666. A high-performance RI sensor in the near-infrared spectral range is achieved by modifying the geometric parameters. This easy-to-fabricate GMR-based all-dielectric sensing device holds great promise for realizing high-performance and compact broadband RI sensors in biochips, electronic tongues, electronic noses, and so on.

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Manuscript ID.  0211
Paper No.  2022-SAT-P0201-P017
Xuan-Wei Miao Energy analysis of robust broadband THz communication system based on radio-over-fiber
Xuan-Wei Miao, Qi-Yuan Guo, Pouya Torkaman, Kai-Ming Feng, Shang-Hua Yang, National Tsing Hua University (Taiwan)

In this study, we demonstrated a robust terahertz communication system and analyzed the received energy. The result shows the signal-to-noise ratio of the received signal and the system’s channel capacity. The outcome gives the direction of construction and improvement of the broadband terahertz communication based on radio-over-fiber.

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Manuscript ID.  0923
Paper No.  2022-SAT-P0201-P018
Heng Li Nonlinear loss measurement and inspection analysis of the silicon waveguide
Heng Li, Wei-Jo Ting, Hung Chun Pan, Hao Chun Hsieh, Wistron corporation (Taiwan)

Since optical limiting can be a bottleneck of device performance, accurate characterization of silicon waveguides for high optical power is now vital for modeling optical-powerconcentrated Si-Ph chips. We report the performance of our optical coupling machine and study the nonlinear loss of silicon waveguide with high power continuous-wave-(CW) 1.31 μm wavelength light sources. Detailed studies will be discussed in the conference.

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Manuscript ID.  0621
Paper No.  2022-SAT-P0201-P019
Jyun-Lin Chen Co-Simulation of High Speed Optical Transmitters with Enhanced EML Equivalent Circuits
Cen-Yu Wang, Jyun-Lin Chen, Lung-Wei Chung, San-Liang Lee, National Taiwan University of Science and Technology (Taiwan)

We demonstrate a modified and improved equivalent small-signal model of External Modulated Laser (EML), which can be used as high speed transmission model for estimating the distributed components of the device. The large-signal circuit model for fully describing the transfer function of EML is also included in this design. By the curve fitting of measured responses to extract device values of the equivalent circuit, the simulation can fit quite well with the measurement results for the EML at various bias voltages.

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Manuscript ID.  0282
Paper No.  2022-SAT-P0201-P020
Yu-Hsiang Lin OOK Signal Transmission Through 125 GHz THz Link by High Gain Lenses for Indoor Applications
Yu-Hsiang Lin, Qi-Yuan Guo, Chih-Hsuan Lee, Pouya Torkaman, Xuan-Wei Miao, Fu-Kai Shih, Kai-Ming Feng, Shang-Hua Yang, National Tsing Hua University (Taiwan)

The terahertz frequency band is predicted to be the dominant spectrum used in wireless communication in the next generation. Due to its massive unutilized bandwidth, it can be used to transfer massive volumes of data in a brief period of time. This study establishes an optical-based communication system capable of delivering 6G/terahertz signal carriers. This experiment presents the 4 Gbps to 12 Gbps OOK signal transmission through wireless distances shorter than 3 meters when the carrier frequency is set to 125GHz. A UHD video signal is eventually transmitted across the system, revealing the possible applications for high-resolution video streaming.

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Manuscript ID.  0510
Paper No.  2022-SAT-P0201-P021
Chen-Feng Huang >100Gb/s Two-Channel Mode Division Multiplexer Integrated with Internal high-speed Modulator on a Silicon Photonics Platform
Chen-Feng Huang, Rih-you Chen, Chen-Yu Yeh, Wei-Cheng Feng, Yi-Jen Chiu, National Sun Yat-sen University (Taiwan)

In this paper, a two-channel mode division multiplexer (MDM) integrated with SiGe electro-absorption modulators (EAM) on a Si photonics chip is proposed. Directional coupler-based mode multiplexer, two SiGe EAM, and two-dimension grating coupler were integrated in a module, leading to >2.5dB dynamics extinction ratio and overall 100Gb/s non-return-to-zero (NRZ) eye diagram of modulation.

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