Ryczkowski Piotr, Amiot Caroline G, Dudley John M, Genty Goëry
Laboratory of Photonics, Tampere University, 33101, Tampere, Finland.
Institut FEMTO-ST, Université Bourgogne Franche-Comté CNRS UMR 6174, 25000, Besançon, France.
Sci Rep. 2021 Apr 16;11(1):8403. doi: 10.1038/s41598-021-87355-z.
We demonstrate computational spectral-domain ghost imaging by encoding complementary Fourier patterns directly onto the spectrum of a superluminescent laser diode using a programmable spectral filter. Spectral encoding before the object enables uniform spectral illumination across the beam profile, removing the need for light collection optics and yielding increased signal-to-noise ratio. In addition, the use of complementary Fourier patterns allows reduction of deleterious of parasitic light effects. As a proof-of-concept, we measure the wavelength-dependent transmission of a Michelson interferometer and a wavelength-division multiplexer. Our results open new perspectives for remote broadband spectral measurements.
我们通过使用可编程光谱滤波器将互补傅里叶图案直接编码到超发光激光二极管的光谱上，展示了计算光谱域鬼成像。在物体之前进行光谱编码可实现光束轮廓上的均匀光谱照明，无需光收集光学器件，并提高信噪比。此外，使用互补傅里叶图案可减少寄生光效应的有害影响。作为概念验证，我们测量了迈克尔逊干涉仪和波分复用器的波长相关透射率。我们的结果为远程宽带光谱测量开辟了新的前景。
