A blazed chirped Bragg grating in a planar silica waveguide device was used to create an integrated diffractive element for a spectrometer. The grating diffracts light from a waveguide and creates a wavelength dependent focus in a manner similar to a bulk diffraction grating spectrometer. An external imaging system is used to analyse the light, later device iterations plan to integrate detectors to make a fully integrated spectrometer. Devices were fabricated with grating period chirp rates in excess of 100 nm mm⁻¹, achieving a focal length of 5.5 mm. Correction of coma aberrations resulted in a device with a footprint of 20 mm×10 mm, a peak FWHM resolution of 1.8 nm, a typical FWHM resolution of 2.6 nm and operating with a 160 nm bandwidth centered at 1550 nm.

中文翻译：

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用于集成石英光谱仪的高chi布拉格光栅。

平面二氧化硅波导装置中的闪耀chi布拉格光栅用于创建光谱仪的集成衍射元件。光栅衍射来自波导的光，并以类似于体衍射光栅光谱仪的方式产生与波长有关的焦点。外部成像系统用于分析光，随后的设备迭代计划集成检测器以构成完全集成的光谱仪。制造的器件具有超过100 nm mm ^-1的光栅周期线性调频率，焦距为5.5 mm。彗形像差的校正导致器件的占位面积为20 mm×10 mm，峰值FWHM分辨率为1.8 nm，典型FWHM分辨率为2.6 nm，并且以1550 nm为中心的160 nm带宽工作。