Noise analysis of spectrometers based on speckle pattern reconstruction

Brandon Redding, Sebastien M. Popoff, Yaron Bromberg, Michael A. Choma, Hui Cao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Speckle patterns produced by a disordered medium or a multimode fiber can be used as a fingerprint to uniquely identify the input light frequency. Reconstruction of a probe spectrum from the speckle pattern has enabled the realization of compact, low-cost, and high-resolution spectrometers. Here we investigate the effects of experimental noise on the accuracy of the reconstructed spectra. We compare the accuracy of a speckle-based spectrometer to a traditional grating-based spectrometer as a function of the probe signal intensity and bandwidth. We find that the speckle-based spectrometers provide comparable performance to a grating-based spectrometer when measuring intense or narrowband probe signals, whereas the accuracy degrades in the measurement of weak or broadband signals. These results are important to identify the applications that would most benefit from this new class of spectrometer.

Original languageAmerican English
Pages (from-to)410-417
Number of pages8
JournalApplied Optics
Issue number3
StatePublished - 20 Jan 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Optical Society of America.


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