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Arbitrary Ratio Power Splitter Based on Shape Optimization for Dual-Band Operation

Optics and Laser Technology(2024)SCI 2区

Ningbo Univ

Cited 5|Views24
Abstract
Arbitrary ratio power splitters (ARPSs) are essential components in integrated photonics. However, most existing ARPSs are limited to operating within a single wavelength band. To address this limitation, in this paper, we propose a 1 × 2 ARPS capable of operating in multi-wavelength bands using the shape optimization method. Harnessing a compact footprint of 14 μm × 1.7 μm, a series of dual-band ARPSs (DBARPSs) with varying power splitting ratios (PSRs) are designed. Within the wavelength ranges of 1280–1340 nm and 1520–1580 nm, all of the DBARPSs have an excess loss of less than 0.55 dB, with PSR deviations falling within the range of −0.5 dB to 1 dB. The practical viability is confirmed through a fabricated DBARPS with a 3 dB PSR. Experimental results show that the PSR deviation is within −0.8 dB to 1 dB, while the excess loss remains below 0.54 dB within the bandwidths of 1280–1340 nm and 1520–1580 nm. Additionally, the same design methodology is extended to develop a high-performance 1310/1550 nm wavelength demultiplexer. The resulting device showcases remarkable performance, with insertion loss below 0.7 dB and extinction ratios higher than 17 dB across the specified wavelength ranges. Experimental outcomes align closely with the design objectives, underscoring the dual-band operational capability and robust generality of the approach outlined in this paper.
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Key words
Silicon photonics,Inverse design,Power splitter
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要点】:本文提出了一种基于形状优化方法设计的双波段任意比例功率分配器,实现了在两个波长范围内的稳定性能,具有低损耗和良好的一致性。

方法】:通过形状优化方法设计1×2型任意比例功率分配器,使其能在多波长带内工作。

实验】:实验中设计并制造了多个双波段任意比例功率分配器,使用的数据集为实验测量的功率分配比和损耗数据,结果表明所设计的分配器在1280–1340 nm和1520–1580 nm的波长范围内,功率分配比偏差在-0.8 dB到1 dB之间,额外损耗低于0.54 dB。同时,基于相同方法开发的高性能1310/1550 nm波长解复用器在指定波长范围内插入损耗低于0.7 dB,消光比高于17 dB。