Laser & Optoelectronics Progress, Volume. 59, Issue 1, 0114004(2022)
Fast All-Optical 4×2 Encoder with High Contrast Based on Two-Dimensional Photonic Crystal
Based on the coupling characteristics of waveguide and microcavity in two-dimensional photonic crystals, an all-optical 4×2 encoder is proposed. The encoder realizes a high-contrast fast encoding function by introducing a microcavity into the Y-shaped waveguide. The performance of the proposed 4×2 encoder is studied by using plane wave method (PWM) and finite-difference time-domain (FDTD) method. The results show that the proposed encoder has a contrast ratio up to 24.55 dB, a response time not exceeding 1.11 ps, a data transmission rate not less than 0.90 Tbit/s, and a size of about 147.45 μm2 at a working wavelength of 1.55 μm. The proposed encoder has simple structure, high contrast, fast response speed, and easy integration, which is expected to play an important role in the fields of optical communications and integrated optical circuits.
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Chang Cai, Zongdan Jiang, Peili Li. Fast All-Optical 4×2 Encoder with High Contrast Based on Two-Dimensional Photonic Crystal[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0114004
Category: Lasers and Laser Optics
Received: Mar. 31, 2021
Accepted: Apr. 15, 2021
Published Online: Dec. 23, 2021
The Author Email: Li Peili (lipl@njupt.edu.cn)