Delayed pulse referencing for cancellation of polychromatic beating noise in grating spectrometry

作者：Conrad B L; Sanders S T^*

来源：Applied Physics B: Lasers and Optics , 2009, 96(4): 715-718.

DOI：10.1007/s00340-009-3628-3

We use a grating spectrometer with a time resolution of 17.4 mu s and a spectral resolution of 5 GHz to analyze a superluminescent source operating near 1350 nm. Polychromatic beating noise is shown to dominate single-shot measurements of the source spectrum; the observed noise level is within 19% of the theoretical beating noise level. By adopting a delayed pulse referencing scheme used previously with wavelength-swept sources, the beating noise is virtually eliminated, allowing spectral measurements limited only by shot noise and camera read noise.

• 出版日期2009-9