Femtometer-resolved simultaneous measurement of multiple laser wavelengths in a speckle wavemeter

Graham D Bruce; Laura O’Donnell; Mingzhou Chen; Morgan Facchin; Kishan Dholakia

doi:10.1364/ol.388960

journal article Mar 23, 2020

Femtometer-resolved simultaneous measurement of multiple laser wavelengths in a speckle wavemeter

Graham D Bruce Laura O’Donnell Mingzhou Chen

Morgan Facchin

Kishan Dholakia

Optics Letters Vol. 45 No. 7 pp. 1926 · Optica Publishing Group

View at Publisher Save 10.1364/ol.388960

Abstract

Many areas of optical science require an accurate measurement of optical spectra. Devices based on laser speckle promise compact wavelength measurement, with attometer-level sensitivity demonstrated for single wavelength laser fields. The measurement of multimode spectra using this approach would be attractive, yet this is currently limited to picometer resolution. Here, we present a method to improve the resolution and precision of speckle-based multi-wavelength measurements. We measure multiple wavelengths simultaneously, in a device comprising a single 1-m-long step-index multimode fiber and a fast camera. Independent wavelengths separated by as little as 1 fm are retrieved with 0.2 fm precision using principal component analysis. The method offers a viable way to measure sparse spectra containing multiple individual lines and may find application in the tracking of multiple lasers in fields such as quantum technologies and optical telecommunications.

Topics

No keywords indexed for this article. Browse by subject →

References

14

[1]

Freude J. Light. Technol. (1986) 10.1109/jlt.1986.1074634

[2]

Kohlgraf-Owens Opt. Lett. (2010) 10.1364/ol.35.002236

[3]

Alexeev Appl. Opt. (2017) 10.1364/ao.56.007413

[4]

Mazilu Appl. Phys. Lett. (2012) 10.1063/1.4728111

[5]

Compact spectrometer based on a disordered photonic chip

Brandon Redding, Seng Fatt Liew, Raktim Sarma et al.

Nature Photonics 2013 10.1038/nphoton.2013.190

[6]

Redding Optica (2014) 10.1364/optica.1.000175

[7]

Chakrabarti Opt. Lett. (2015) 10.1364/ol.40.003264

[8]

Cao J. Opt. (2017) 10.1088/2040-8986/aa7251

[9]

Kürüm Opt. Express (2019) 10.1364/oe.27.020965

[10]

Mazilu Opt. Lett. (2014) 10.1364/ol.39.000096

[11]

Metzger Nat. Commun. (2017) 10.1038/ncomms15610

[12]

Bruce Opt. Lett. (2019) 10.1364/ol.44.001367

[13]

O’Donnell Opt. Commun. (2020) 10.1016/j.optcom.2019.124906

[14]

Couturier Rev. Sci. Instrum. (2018) 10.1063/1.5025537

Cited By

34

Deep learning in nano-photonics: inverse design and beyond

Peter R. Wiecha, Arnaud Arbouet · 2021

Photonics Research

Metrics

34

Citations

14

References

Details

Published: Mar 23, 2020
Vol/Issue: 45(7)
Pages: 1926
License: View

Authors

Funding

Leverhulme Trust Award: RPG-2017-197

Engineering and Physical Sciences Research Council Award: EP/R004854/1

Cite This Article

Graham D Bruce, Laura O’Donnell, Mingzhou Chen, et al. (2020). Femtometer-resolved simultaneous measurement of multiple laser wavelengths in a speckle wavemeter. Optics Letters, 45(7), 1926. https://doi.org/10.1364/ol.388960

Femtometer-resolved simultaneous measurement of multiple laser wavelengths in a speckle wavemeter

You May Also Like