Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

Nikolaus Klaus Metzger; Roman Spesyvtsev; Graham D. Bruce; Bill Miller; Gareth T. Maker; Graeme Malcolm; Michael Mazilu; Kishan Dholakia

doi:10.1038/ncomms15610

Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

Nikolaus Klaus Metzger, Roman Spesyvtsev, Graham D. Bruce, Bill Miller, Gareth T. Maker, Graeme Malcolm, Michael Mazilu, Kishan Dholakia

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Abstract

The accurate determination and control of the wavelength of light is fundamental to many fields of science. Speckle patterns resulting from the interference of multiple reflections in disordered media are well-known to scramble the information content of light by complex but linear processes. However, these patterns are, in fact, exceptionally rich in information about the illuminating source. We use a fibre-coupled integrating sphere to generate wavelength-dependent speckle patterns, in combination with algorithms based on the transmission matrix method and principal component analysis, to realize a broadband and sensitive wavemeter. We demonstrate sub-femtometre wavelength resolution at a centre wavelength of 780 nm, and a broad calibrated measurement range from 488 to 1,064 nm. This compares favourably to the performance of conventional wavemeters. Using this speckle wavemeter as part of a feedback loop, we stabilize a 780 nm diode laser to achieve a linewidth better than 1 MHz.

Original language	English
Article number	15610
Number of pages	8
Journal	Nature Communications
Volume	8
DOIs	https://doi.org/10.1038/ncomms15610
Publication status	Published - 5 Jun 2017

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@article{8ff5b39b23ef4b1aa3fde4c105885916,

title = "Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization",

abstract = "The accurate determination and control of the wavelength of light is fundamental to many fields of science. Speckle patterns resulting from the interference of multiple reflections in disordered media are well-known to scramble the information content of light by complex but linear processes. However, these patterns are, in fact, exceptionally rich in information about the illuminating source. We use a fibre-coupled integrating sphere to generate wavelength-dependent speckle patterns, in combination with algorithms based on the transmission matrix method and principal component analysis, to realize a broadband and sensitive wavemeter. We demonstrate sub-femtometre wavelength resolution at a centre wavelength of 780 nm, and a broad calibrated measurement range from 488 to 1,064 nm. This compares favourably to the performance of conventional wavemeters. Using this speckle wavemeter as part of a feedback loop, we stabilize a 780 nm diode laser to achieve a linewidth better than 1 MHz.",

author = "Metzger, \{Nikolaus Klaus\} and Roman Spesyvtsev and Bruce, \{Graham D.\} and Bill Miller and Maker, \{Gareth T.\} and Graeme Malcolm and Michael Mazilu and Kishan Dholakia",

note = "We acknowledge funding from EPSRC through an Impact Acceleration Account (IAA) Case Study award and grants EP/J01771X/1 and EP/M000869/1.",

year = "2017",

month = jun,

day = "5",

doi = "10.1038/ncomms15610",

language = "English",

volume = "8",

journal = "Nature Communications",

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T1 - Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

AU - Metzger, Nikolaus Klaus

AU - Spesyvtsev, Roman

AU - Bruce, Graham D.

AU - Miller, Bill

AU - Maker, Gareth T.

AU - Malcolm, Graeme

AU - Mazilu, Michael

AU - Dholakia, Kishan

N1 - We acknowledge funding from EPSRC through an Impact Acceleration Account (IAA) Case Study award and grants EP/J01771X/1 and EP/M000869/1.

PY - 2017/6/5

Y1 - 2017/6/5

N2 - The accurate determination and control of the wavelength of light is fundamental to many fields of science. Speckle patterns resulting from the interference of multiple reflections in disordered media are well-known to scramble the information content of light by complex but linear processes. However, these patterns are, in fact, exceptionally rich in information about the illuminating source. We use a fibre-coupled integrating sphere to generate wavelength-dependent speckle patterns, in combination with algorithms based on the transmission matrix method and principal component analysis, to realize a broadband and sensitive wavemeter. We demonstrate sub-femtometre wavelength resolution at a centre wavelength of 780 nm, and a broad calibrated measurement range from 488 to 1,064 nm. This compares favourably to the performance of conventional wavemeters. Using this speckle wavemeter as part of a feedback loop, we stabilize a 780 nm diode laser to achieve a linewidth better than 1 MHz.

AB - The accurate determination and control of the wavelength of light is fundamental to many fields of science. Speckle patterns resulting from the interference of multiple reflections in disordered media are well-known to scramble the information content of light by complex but linear processes. However, these patterns are, in fact, exceptionally rich in information about the illuminating source. We use a fibre-coupled integrating sphere to generate wavelength-dependent speckle patterns, in combination with algorithms based on the transmission matrix method and principal component analysis, to realize a broadband and sensitive wavemeter. We demonstrate sub-femtometre wavelength resolution at a centre wavelength of 780 nm, and a broad calibrated measurement range from 488 to 1,064 nm. This compares favourably to the performance of conventional wavemeters. Using this speckle wavemeter as part of a feedback loop, we stabilize a 780 nm diode laser to achieve a linewidth better than 1 MHz.

UR - https://www.nature.com/articles/ncomms15610#Sec14

UR - https://www.scopus.com/pages/publications/85020477497

U2 - 10.1038/ncomms15610

DO - 10.1038/ncomms15610

M3 - Article

SN - 2041-1723

VL - 8

JO - Nature Communications

JF - Nature Communications

M1 - 15610

ER -

Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

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Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

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