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Using a multimode fiber as a high-resolution, low-loss spectrometer |
Optics Letters, Vol. 37, Issue 16, pp. 3384-3386 (2012)
http://dx.doi.org/10.1364/OL.37.003384
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Abstract
We propose and demonstrate that a conventional multimode fiber can function as a high-resolution, low-loss spectrometer. The proposed spectrometer consists only of the fiber and a camera that images the speckle pattern generated by interference among the fiber modes. Although this speckle pattern is detrimental to many applications, it encodes information about the spectral content of the input signal, which can be recovered using calibration data. We achieve a spectral resolution of 0.15 nm over 25 nm bandwidth using 1 m long fiber, and 0.03 nm resolution over 5 nm bandwidth with a 5 m fiber. The insertion loss is less than 10%, and the signal-to-noise ratio in the reconstructed spectra is more than 1000.
© 2012 Optical Society of America
OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6190) Spectroscopy : Spectrometers
(300.6480) Spectroscopy : Spectroscopy, speckle
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: June 13, 2012
Revised Manuscript: July 10, 2012
Manuscript Accepted: July 17, 2012
Published: August 8, 2012
Virtual Issues
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics
Citation
Brandon Redding and Hui Cao, "Using a multimode fiber as a high-resolution, low-loss spectrometer," Opt. Lett. 37, 3384-3386 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-16-3384
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