Cheben Pavel, Powell Ian, Janz Siegfried, Xu Dan-Xia
Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario, Canada.
Opt Lett. 2005 Jul 15;30(14):1824-6. doi: 10.1364/ol.30.001824.
We propose a new type of arrayed waveguide grating (AWG) device that operates as a Fourier-transform (FT) spectrometer without the need of scanning elements. The large input aperture size typical of a FT spectrometer eliminates the requirement for a narrow single-mode input waveguide while still achieving high spectral resolution with a markedly increased light-gathering capability (etendue). An example of the device with a resolution of 0.07 nm (approximately 10 GHz) and designed for a silicon-on-insulator platform is presented. The calculated spectra show no noticeable deterioration for aperture widths as large as 40 microm, yielding more than a 50-fold increase in aperture size compared with conventional AWG or echelle grating based devices at the equivalent resolution.
我们提出了一种新型的阵列波导光栅（AWG）器件，它作为傅里叶变换（FT）光谱仪运行，无需扫描元件。FT光谱仪典型的大输入孔径尺寸消除了对窄单模输入波导的需求，同时仍能通过显著提高的光收集能力（ étendue ）实现高光谱分辨率。给出了一个分辨率为0.07 nm（约10 GHz）且专为绝缘体上硅平台设计的器件示例。计算得到的光谱表明，对于高达40微米的孔径宽度，没有明显的劣化，与基于传统AWG或阶梯光栅的器件在等效分辨率下相比，孔径尺寸增加了50倍以上。
