相位控制相位調制器之研究;Study of Phase-controlled Phase Modulators

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题名:	相位控制相位調制器之研究;Study of Phase-controlled Phase Modulators
作者:	宋德致;Sung, Te-Chih
贡献者:	光電科學與工程學系
关键词:	全光學相位調制器;all-optical phase modulator
日期:	2025-07-01
上传时间:	2025-10-17 11:42:59 (UTC+8)
出版者:	國立中央大學
摘要:	在本研究中，為實現高效且可重構的光學相位調制器架構，採用連續波雷射源、光學定向耦合器、摻鉺光纖放大器（EDFA）與相位調制器等光學元件，設計出兩種不同輸出形式的相位控制相位調制器架構，分別為「直線型」與「正弦曲線型」輸出。其中，EDFA 具備高增益、低噪聲與寬頻帶等特性，能有效放大訊號光，提升系統整體性能，並廣泛應用於光纖通訊與光學計算系統中。為精確調控光學元件參數，本研究引入雙層多層感知器（2-layer multilayer perceptron, MLP）系統，推導出光學定向耦合器的耦合率與相位調制器的相位延遲。其中相位調制器透過電光效應改變光波相位，實現高速且精確的相位控制，廣泛應用於光通訊與光學計算等領域。在性能評估方面，透過多組模擬結果與理想值進行標準差分析。結果顯示，直線型架構的相位與功率標準差最低值分別為 1.77° 與 0.048mW；正弦曲線型架構的相位與功率標準差最低值則分別為 1.69° 與 0.014mW，顯示兩種架構皆具備良好的穩定性與準確性。此外，這些相位控制相位調制器架構可被建構於晶片上，並應用於光學計算系統的發展中。 ;In this study, to realize an efficient and reconfigurable optical phase modulator architecture, we employed optical components such as a continuous-wave (CW) laser source, optical directional couplers, erbium-doped fiber amplifiers (EDFAs), and phase modulators. Based on these components, two types of phase-controlled phase modulator architectures with different output forms were designed: a linear-type output and a sinusoidal-type output. Among them, the EDFA, which possesses characteristics such as high gain, low noise, and broad bandwidth, can effectively amplify the signal light and enhance overall system performance. EDFAs are widely utilized in optical fiber communication and optical computing systems. To precisely control the parameters of the optical components, this study introduces a two-layer multilayer perceptron (2-layer MLP) system to derive the coupling ratios of the optical directional couplers and the phase delays of the phase modulators. The phase modulators, by utilizing the electro-optic effect, enable high-speed and precise phase control and are extensively applied in the fields of optical communication and optical computing. For performance evaluation, multiple simulation datasets were analyzed using standard deviation comparisons against ideal values. The results indicate that the linear-type architecture achieves minimum phase and power standard deviations of 1.77° and 0.048 mW, respectively, while the sinusoidal-type architecture achieves minimum phase and power standard deviations of 1.69° and 0.014 mW, respectively. These results demonstrate that both architectures exhibit excellent stability and accuracy. Moreover, the proposed phase-controlled phase modulator architectures can be integrated on-chip and are suitable for future developments in optical computing systems.
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