- 作者： Ting Lv, Shaofu Xu, Bo Li, Ruicheng Qiu, Yixi Liu and Weiwen Zou*
- 摘要：We propose a programmable optical delay line network architecture based on dynamic allocation of optical delay resources, which provides a greater diversity of programmable delay combinations among multiple channels and reduces the required number of delay lines. By scheduling optical switches, optical delay lines are reused across different channels, reducing redundancy of optical delay lines of previous architectures. Results demonstrate that, compared with state-of-the-art cascade architectures, the proposed one achieves more than 2-fold increase of maximum inter-channel delay difference at lower delay line cost. Our architecture is thus significant advantageous in applications such as optical beamforming, optical computing, programmable microwave photonic processors, and quantum circuits.
Conclusion: We proposed a low-redundancy PODLN architecture featuring dynamic delay allocation. Due to the reuse of delay lines, the proposed PODLN need less delay line resources while obtain better programmability and scalability. The proposed 2/3-channel architectures can be extended to arbitrary channel numbers and delay ranges. Results show lower hardware cost and superior performance versus state‑of‑the‑art designs, making it a strong candidate for next‑generation efficient photonics.
- 出版源：IEEE Photonics Conference 2025, Oral presentation