Finesse Limits in hollow core fiber based Fabry-Perot interferometers
Finesse Limits in hollow core fiber based Fabry-Perot interferometers
Due to their low sensitivity to changes to the external environment, low optical nonlinearity, low chromatic dispersion, and compatibility with fiber systems, hollow-core optical fibers (HCFs) represent an ideal medium for fiber Fabry-Perot interferometers (FPs). Many applications can benefit from the availability of FPs with high finesse or high finesse-length product. However, the mechanisms that limit the performance of HCF-based FPs are yet to be fully elucidated to the best of our knowledge. In this paper, we present a comprehensive analysis of several factors that impact HCF-FP performance and limit their finesse, e. g., mirror tilt, the distance between the HCF end-face and mirror, HCF cleave angle and HCF attenuation. In a sequence of experiments, we built and characterized five HCF-FPs with lengths ranging from 0.65 m to 9.25 m. By fitting the experimental data with derived analytical expressions, we found the mirror-assisted coupling loss to be below -0.0028 dB (corresponding to a coupling efficiency of 99.94%), which should allow finesse values greater than 5000 to be achieved. Experimentally, we demonstrate here a value of 2400, limited by the parameters of the mirrors available to us presently. We then show that the low coupling loss and high repeatability of mirror alignment and HCF cleave quality allows the effective use of such high-finesse FP for reliable measurements of HCF attenuation, even with short fiber length samples (10 m in our demonstration).
Couplings, Fabry-Perot, Loss measurement, Mirrors, Optical fiber dispersion, Optical fibers, Propagation losses, Reflectivity, hollow-core fibers, interferometers, optical fiber devices
4489-4495
Ding, Meng
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Numkam Fokoua, Eric
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Bradley, Thomas J.
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Poletti, Francesco
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Richardson, David J.
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Slavík, Radan
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20 April 2021
Ding, Meng
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Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Bradley, Thomas J.
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Ding, Meng, Numkam Fokoua, Eric, Bradley, Thomas J., Poletti, Francesco, Richardson, David J. and Slavík, Radan
(2021)
Finesse Limits in hollow core fiber based Fabry-Perot interferometers.
IEEE Journal of Lightwave Technology, 39 (13), , [9408601].
(doi:10.1109/JLT.2021.3074140).
Abstract
Due to their low sensitivity to changes to the external environment, low optical nonlinearity, low chromatic dispersion, and compatibility with fiber systems, hollow-core optical fibers (HCFs) represent an ideal medium for fiber Fabry-Perot interferometers (FPs). Many applications can benefit from the availability of FPs with high finesse or high finesse-length product. However, the mechanisms that limit the performance of HCF-based FPs are yet to be fully elucidated to the best of our knowledge. In this paper, we present a comprehensive analysis of several factors that impact HCF-FP performance and limit their finesse, e. g., mirror tilt, the distance between the HCF end-face and mirror, HCF cleave angle and HCF attenuation. In a sequence of experiments, we built and characterized five HCF-FPs with lengths ranging from 0.65 m to 9.25 m. By fitting the experimental data with derived analytical expressions, we found the mirror-assisted coupling loss to be below -0.0028 dB (corresponding to a coupling efficiency of 99.94%), which should allow finesse values greater than 5000 to be achieved. Experimentally, we demonstrate here a value of 2400, limited by the parameters of the mirrors available to us presently. We then show that the low coupling loss and high repeatability of mirror alignment and HCF cleave quality allows the effective use of such high-finesse FP for reliable measurements of HCF attenuation, even with short fiber length samples (10 m in our demonstration).
Text
Finesse Limits in Hollow Core Fiber based Fabry-Perot interferometers
- Accepted Manuscript
More information
e-pub ahead of print date: 20 April 2021
Published date: 20 April 2021
Additional Information:
This work was supported by EPSRC project “Airguide Photonics”, under Grant EP/P030181/1. The work of Meng Ding was supported by CSC scholarship. The work of Francesco Poletti was supported by EU ERC under Grant 682724. The work of Radan Slavík and Eric R. Numkam Fokoua was supported by RAEng Fellowship. (Corresponding author: Meng Ding.) The authors are with the Optoelectronic Research Centre, University of Southampton, SO17 1BJ, U.K. (e-mail: m.ding@soton.ac.uk; eric.numkam-fokoua@soton.ac.uk; t.bradley@soton.ac.uk; frap@orc.soton.ac.uk; djr@ orc.soton.ac.uk; r.slavik@soton.ac.uk).
Keywords:
Couplings, Fabry-Perot, Loss measurement, Mirrors, Optical fiber dispersion, Optical fibers, Propagation losses, Reflectivity, hollow-core fibers, interferometers, optical fiber devices
Identifiers
Local EPrints ID: 450446
URI: http://eprints.soton.ac.uk/id/eprint/450446
ISSN: 0733-8724
PURE UUID: f5322718-1e1d-4d04-bde1-de875b179955
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Date deposited: 28 Jul 2021 16:31
Last modified: 17 Mar 2024 03:32
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Author:
Eric Numkam Fokoua
Author:
Thomas J. Bradley
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