Projects per year
Abstract
The speckle pattern produced when a laser is scattered by a disordered medium has recently been shown to give a surprisingly accurate or broadband measurement of wavelength. Here it is shown that deep learning is an ideal approach to analyse wavelength variations using a speckle wavemeter due to its ability to identify trends and overcome low signal to noise ratio in complex datasets. This combination enables wavelength measurement at high precision over a broad operating range in a single step, with a remarkable capability to reject instrumental and environmental noise, which has not been possible with previous approaches. It is demonstrated that the noise rejection capabilities of deep learning provide attometre-scale wavelength precision over an operating range from 488 nm to 976 nm. This dynamic range is six orders of magnitude beyond the state of the art.
Original language | English |
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Article number | 2000120 |
Number of pages | 8 |
Journal | Laser & Photonics Reviews |
Volume | 14 |
Issue number | 9 |
Early online date | 2 Aug 2020 |
DOIs | |
Publication status | Published - Sept 2020 |
Keywords
- Automated noise rejection
- Deep learning
- Speckle metrology
- Wavelength measurement
Fingerprint
Dive into the research topics of 'Deep learning enabled laser speckle wavemeter with a high dynamic range'. Together they form a unique fingerprint.Projects
- 2 Finished
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Making the most of interference: Making the most of interference: new metrology application of laser speckle
Dholakia, K. (PI)
1/09/17 → 30/11/20
Project: Standard
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Resonant and shaped photonics for under: Resonant and shaped photonics for understanding the physical and biomedical world
Dholakia, K. (PI) & Gather, M. C. (CoI)
1/08/17 → 31/07/22
Project: Standard
Datasets
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Data Underpinning: Deep learning enabled laser speckle wavemeter with a high dynamic range
Gupta, R. (Creator), Bruce, G. D. (Creator), Powis, S. J. (Creator) & Dholakia, K. (Creator), University of St Andrews, 18 Oct 2019
DOI: 10.17630/d6049ec8-972e-4820-9cd4-9552b26c8426
Dataset
File
Research output
- 2 Article
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Femtometer-resolved simultaneous measurement of multiple laser wavelengths in a speckle wavemeter
Bruce, G. D., O'Donnell, L., Chen, M., Facchin, M. & Dholakia, K., 1 Apr 2020, In: Optics Letters. 45, 7, p. 1926-1929Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Speckle-based determination of the polarisation state of single and multiple laser beams
Facchin, M., Bruce, G. D. & Dholakia, K., 15 May 2020, In: OSA Continuum. 3, 5, p. 1302-1313 12 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile