Yung‐Jr Hung

Broadband silicon 3 dB coupler designed via fast quasi-adiabatic dynamics and counter-diabatic bending

Yung‐Jr Hung, J. W. Lai, Yi-Feng Lee, You-Hsuan Hsieh et autres

We present a compact and robust silicon photonic 3 dB adiabatic coupler designed using a deterministic two-step methodology based on shortcuts to adiabaticity. By applying the fast quasi-adiabatic dynamics (FAQUAD) protocol, we homogenize the adiabaticity parameter to significantly compress the device footprint. …

Broadband silicon 3 dB coupler designed via fast quasi-adiabatic dynamics and counter-diabatic bending

Yung‐Jr Hung, J. W. Lai, Yi-Feng Lee, You-Hsuan Hsieh et autres

We present a compact and robust silicon photonic 3 dB adiabatic coupler designed using a deterministic two-step methodology based on shortcuts to adiabaticity. By applying the fast quasi-adiabatic dynamics (FAQUAD) protocol, we homogenize the adiabaticity parameter to significantly compress the device footprint. …

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Thermally Stabilized Three-Axis Silicon Photonic Interferometric Fiber-Optic Gyroscope

Wei-Xuan Chen, Tzu-Jung Kuo, Yung‐Jr Hung

We demonstrate a thermally stabilized three-axis silicon photonic interferometric fiber-optic gyroscope (IFOG) integrating a micro-thermoelectric cooler (micro-TEC). The 1.2$\text{mm}^{2}$Si-MIOC achieves low crosstalk$(<-26.5 ~\text{dB})$, 0.04$0.06^{\circ} / \sqrt{ } h$angle random walk, and$0.91^{\circ} / h$bias instability, enabling compact, tactical-grade inertial navigation modules.

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A Transimpedance Amplifier Design with Tunable Gain and DC Offset for PNN-Based AI Edge Applications

Chua‐Chin Wang, J. H. Chen, Yung‐Jr Hung, Zong-Ming Chang et autres

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Coarse Wavelength Division (De)Multiplexer Based on Sin Cascaded Mach-Zehnder Interferometers with Low-Loss Waveguide Bends and Directional Couplers

Chih-Hsien Chen, Zong-Ming Chang, Po-Chou Hung, Yung‐Jr Hung

We incorporated SiN low-loss waveguide bends and directional couplers to construct cascaded Mach-Zehnder interferometers for CWDM wavelength (de)multiplexing with$<2$dB insertion loss,14 nm optical passband.

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Cascaded triple ring resonators with low-loss waveguide bends for dense wavelength division (de)multiplexing

Chih‐Hsien Chen, Yung‐Jr Hung

We employ a low-loss waveguide bend design having gradually changed width and bending radius to realize a cascaded triple ring resonators on silicon nitride platform. Experiments revealed that this device offers -1.5 dB insertion loss, 120 GHz optical passband, 46 dB extinction …

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Optical pigtailing 64 channel silicon photonics grating couplers through a two-dimensional fiber array for co-packaged optics applications

Yung‐Jr Hung

Employing two-dimensional fiber array to exploit optical input/output on the surface of silicon photonics chip is promising to keep up with the bandwidth demand. We demonstrate direct optical access of 64 grating couplers through a two-dimensional fiber array with negligible degradation on …

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A Wide Bandwidth TIA with Low Power Consumption for PNN Prototyping

L S S Pavan Kumar Chodisetti, Jen-Yu Li, Pradyumna Vellanki, Yung‐Jr Hung

This paper presents a high-speed, low-power transimpedance amplifier (TIA) designed for integration within photonic neural networks (PNNs). The proposed architecture, implemented using the TSMC TN40G process, incorporates an active-feedback TIA core, an inductor-less Balun, a digital DC Offset Calibration (DCOC) loop, and …

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Silicon Photonics Multi-Function Integrated Optical Circuit With Hybrid III–V Photodiode for Miniaturized Fiber Optic Gyroscope Applications

Yung‐Jr Hung, Ting-Hsuan Kuo, Meng-Hsuan Tsai, Shu‐Ting Yang et autres

We present a silicon photonics multi-function integrated optical circuit (Si-MIOC) with a hybridintegrated III-V photodiode (PD) designed for miniaturized interferometric fiber optic gyroscope (IFOG) applications. The Si-MIOC integrates key IFOG components—including phase modulators, power couplers, and polarization filters—onto a single chip, while …

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All-Optical Broadband-Tunable Terahertz Wave Generation with Low Phase Noise and Narrow Linewidth Using Two Mutually Injected Semiconductor Lasers

Chin-Hao Tseng, Yung‐Jr Hung, Sheng-Kwang Hwang

This study investigates a novel all-optical approach for generating terahertz waves with narrow linewidth and low phase noise by employing two mutually injected semiconductor lasers. Broadband-tunable terahertz wave generation, spanning from 220 to 320 GHz, is achieved, featuring a 3-dB linewidth below …

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All-Optical, Broadband-Tunable Terahertz-Wave Generation with Frequency-Independent 100-Hz Linewidth and Low Phase Noise

Chin-Hao Tseng, Yung‐Jr Hung, Sheng-Kwang Hwang

This research proposes a novel all-optical photonic approach for tunable terahertz-wave generation from 100 to 320 GHz, achieving a 3-dB linewidth below 160 Hz and phase noise below$-95 \text{dBc} / \text{Hz}$at a$100-\text{kHz}$offset.

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A 12-bit Current-Steering DAC with Output Impedance Compensation for PNN Prototyping

Pradyumna Vellanki, Friedel Gerfers, Yung‐Jr Hung, Chewn-Pu Jou et autres

This article presents the design and implementation of a highly linear and output impedance compensated digital-to-analog converter (DAC). The proposed architecture minimizes layout area while maintaining high linearity and optimized output impedance. The DAC comprises several key functional blocks, including a Stacked …

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