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Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system
Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system

We describe a compact, all fiber, frequency stabilized diode laser system at 2051 nm using CO2 gas-filled Kagome Hollow Core Fiber (HCF), capable of tuning continuously over four transitions in12C16O2: R(24), R(26), R(28), and R(30). This laser system has been designed for use in future space-based atmospheric monitoring using differential absorption lidar (DIAL). The fully spliced Kagome HCF gas cell is filled to 2 kPa CO2 partial pressure and we compare the observed CO2 lineshape features with those calculated using HITRAN, to quantify the properties of the CO2-filled fiber cell. In this first demonstration of Kagome HCF used in a fully sealed gas cell configuration for spectroscopy at 2 µm, we characterize the frequency stability of the locked system by beat frequency comparison against a reference laser. Results are presented for the laser locked to the center of the12C16O2 R(30) transition, with frequency stability of ∼40 kHz or better at 1 s, and a frequency reproducibility at the 0.4-MHz level over a period of > 1 month. For DIAL applications, we also demonstrate two methods of stabilizing the laser frequency ∼3 GHz from this line. Furthermore, no pressure degradation was observed during the ∼15-month period in which frequency stability measurements were acquired.

1094-4087
28621-28633
Anne Curtis, E.
098663f9-2653-4124-95f7-e72185f3cedc
Bradley, Thomas
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Barwood, Geoffrey P.
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Edwards, Christopher S.
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Wheeler, Natalie V.
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Phelan, Richard
cf8597ff-53c7-416e-986f-059bf9f05c93
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petrovich, Marco N.
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Gill, Patrick
e939ee73-05de-460a-a0b5-c1d1abe3dff9
Anne Curtis, E.
098663f9-2653-4124-95f7-e72185f3cedc
Bradley, Thomas
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Barwood, Geoffrey P.
9bbf9dd2-6acb-4615-98c0-f22466b41556
Edwards, Christopher S.
4db217a1-0c96-41f4-8ecd-5645646928e9
Wheeler, Natalie V.
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Phelan, Richard
cf8597ff-53c7-416e-986f-059bf9f05c93
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petrovich, Marco N.
bfe895a0-da85-4a40-870a-2c7bfc84a4cf
Gill, Patrick
e939ee73-05de-460a-a0b5-c1d1abe3dff9

Anne Curtis, E., Bradley, Thomas, Barwood, Geoffrey P., Edwards, Christopher S., Wheeler, Natalie V., Phelan, Richard, Richardson, David J., Petrovich, Marco N. and Gill, Patrick (2018) Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system. Optics Express, 26 (22), 28621-28633. (doi:10.1364/OE.26.028621).

Record type: Article

Abstract

We describe a compact, all fiber, frequency stabilized diode laser system at 2051 nm using CO2 gas-filled Kagome Hollow Core Fiber (HCF), capable of tuning continuously over four transitions in12C16O2: R(24), R(26), R(28), and R(30). This laser system has been designed for use in future space-based atmospheric monitoring using differential absorption lidar (DIAL). The fully spliced Kagome HCF gas cell is filled to 2 kPa CO2 partial pressure and we compare the observed CO2 lineshape features with those calculated using HITRAN, to quantify the properties of the CO2-filled fiber cell. In this first demonstration of Kagome HCF used in a fully sealed gas cell configuration for spectroscopy at 2 µm, we characterize the frequency stability of the locked system by beat frequency comparison against a reference laser. Results are presented for the laser locked to the center of the12C16O2 R(30) transition, with frequency stability of ∼40 kHz or better at 1 s, and a frequency reproducibility at the 0.4-MHz level over a period of > 1 month. For DIAL applications, we also demonstrate two methods of stabilizing the laser frequency ∼3 GHz from this line. Furthermore, no pressure degradation was observed during the ∼15-month period in which frequency stability measurements were acquired.

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Accepted/In Press date: 18 September 2018
e-pub ahead of print date: 19 October 2018
Published date: 29 October 2018

Identifiers

Local EPrints ID: 426070
URI: https://eprints.soton.ac.uk/id/eprint/426070
ISSN: 1094-4087
PURE UUID: 6717662e-217f-436c-aa2b-405b69b6d4d9
ORCID for Thomas Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Natalie V. Wheeler: ORCID iD orcid.org/0000-0002-1265-9510
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Marco N. Petrovich: ORCID iD orcid.org/0000-0002-3905-5901

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Date deposited: 13 Nov 2018 17:30
Last modified: 14 Mar 2019 01:54

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Contributors

Author: E. Anne Curtis
Author: Thomas Bradley ORCID iD
Author: Geoffrey P. Barwood
Author: Christopher S. Edwards
Author: Richard Phelan
Author: Patrick Gill

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