Chinese Optics Letters, 2019, 17 (12): 123001, Published Online: Dec. 3, 2019
Miniature spectrometer based on a Fourier transform spectrometer chip and a commercial photodetector array Download: 778次
300.6300 Spectroscopy, Fourier transforms 070.4790 Spectrum analysis 220.4830 Systems design 230.3120 Integrated optics devices
Abstract
We demonstrate a novel type of miniature spectrometer based on a Fourier transform spectrometer (FTS) chip with a dense output array and a commercial photodetector (PD) array. The FTS chip has an output array cycle of 20 μm and consists of 51 Mach–Zehnder interferometers (MZIs), and the PD array is a commercial linear charged coupled device (CCD). An achromatic triplet lens is used to image the MZI output interferogram onto the CCD with a small aberration. Our experiment result shows that a free spectral range (FSR) from 489 nm to 584 nm and a retrieved spectral resolution of 3.5 nm at 532 nm are obtained. The achieved properties show that our spectrometer has the potential to outperform the best commercial compact one in terms of most performance indices.
Xiao Ma, Jun Zou, Wenhuan Li, Jian-Jun He. Miniature spectrometer based on a Fourier transform spectrometer chip and a commercial photodetector array[J]. Chinese Optics Letters, 2019, 17(12): 123001.