一种紧凑型片上窄带三通道波长解复用器的逆向设计与演示
Inverse design and demonstration of a compact on-chip narrowband three-channel wavelength demultiplexer
摘要：
在波分复用（WDM）方案中，必须使用分路器来组合和分离不同的波长。传统的分光器相当大，其占用面积为数百至数千平方微米，并且实验证明的基于MMI和反向设计的超紧凑分光器仅以两个通道和大通道间隔（$>$ 100 nm）工作。在这里，我们反向设计和实验证明了一个三通道波长解复用器与40 nm的间距（1500 nm，1540 nm，1580 nm）的足迹为24.75 $μ\mathrm{m}^2$。该分路器的模拟峰值插入损耗为-1.55 dB，串扰低于-15 dB，实测峰值插入损耗为-2.29 dB，串扰低于-10.7 dB。
英文摘要：
In wavelength division multiplexing (WDM) schemes, splitters must be used to combine and separate different wavelengths. Conventional splitters are fairly large with footprints in hundreds to thousands of square microns, and experimentally-demonstrated MMI-based and inverse-designed ultra-compact splitters operate with only two channels and large channel spacing ($>$100 nm). Here we inverse design and experimentally demonstrate a three-channel wavelength demultiplexer with 40 nm spacing (1500 nm, 1540 nm, and 1580 nm) with a footprint of 24.75 $μ\mathrm{m}^2$. The splitter has a simulated peak insertion loss of -1.55 dB with under -15 dB crosstalk and a measured peak insertion loss of -2.29 dB with under -10.7 dB crosstalk.
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