论文标题
使用分层波导过滤器的片上光谱仪
On-chip spectrometer using stratified waveguides filters
论文作者
论文摘要
我们在硅平台上呈现一个超紧凑的单发光谱仪，具有宽阔的操作带宽和高分辨率。它由32个分层的波导过滤器（SWF）组成，具有不同的传输光谱，用于对输入信号的未知光谱进行采样，以及一种专门设计的超紧凑结构，用于将入射信号分解为32个过滤器，并具有低失衡。每个SWF的占地面积小于1UM x 30UM，而1x32分配器和32个过滤器总计占据了约35UM x 260UM的面积，据我们所知，这是在硅光子平台上实现的最小的占地面积光谱仪。制造的光谱仪的实验特性表明，以1550nm为中心的180nm的宽宽带宽度和窄带峰为0.45nm全高，最大最大最大最大（FWHM）可以清楚地解决。该概念也可以使用其他材料平台在各种应用中感兴趣的光谱带中实现。
We present an ultra-compact single-shot spectrometer on silicon platform with broad operation bandwidth and high resolution. It consists of 32 stratified waveguide filters (SWFs) with diverse transmission spectra for sampling the unknown spectrum of the input signal and a specially designed ultra-compact structure for splitting the incident signal into 32 filters with low imbalance. Each SWF has a footprint less than 1um x 30um, while the 1x32 splitter and 32 filters in total occupy an area of about 35um x 260um, which to the best of our knowledge, is the smallest footprint spectrometer realized on silicon photonic platform. Experimental characteristics of the fabricated spectrometer demonstrate a broad operating bandwidth of 180nm centered at 1550nm and narrowband peaks with 0.45nm Full-Width-Half-Maximum (FWHM) can be clearly resolved. This concept can also be implemented using other material platforms for operation in optical spectral bands of interest for various applications.
