Chinese Optics Letters, Vol. 17, Issue 12, 123001 (2019)
Miniature spectrometer based on a Fourier transform spectrometer chip and a commercial photodetector array
Xiao Ma1,*, Jun Zou2, Wenhuan Li3, and Jian-Jun He1
- 1College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
- 2College of Science, Zhejiang University of Technology, Hangzhou 310023, China
- 3Zhejiang Lightip Electronics Technology Co., Ltd., Wenzhou 325000, China
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.