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Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers

Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers
Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers

In this work, a Tm3-doped solgel silica microsphere lasing at 2.0 μm is reported. Microspheres with different Tm3 concentrations are fabricated by overlaying different Tm3 concentration solgel solutions on the surface of a pure silica microsphere resonator and then annealing the sample with a CO2 laser. Based on a traditional fiber taper–microsphere coupling method, single and multimode microsphere lasing in the wavelength range 1.8–2.0 μm is observed if an 808 nm laser diode is used as a pump source. A relatively low threshold pumping power of 1.2 mW is achieved using this arrangement. This solgel method allows for an easy varying of the Tm3 doping concentration. The observed laser output shifts to longer wavelengths when the Tm3 doping concentration increases. This has been explained by the larger Tm absorption at shorter wavelengths. The ability to fabricate solgel co-doped silica glass microlasers represents a new generation of low threshold and compact infrared laser sources for use as miniaturized photonic components for a wide range of applications, including gas sensing and medical surgery.

0146-9592
4325-4328
Li, Angzhen
2a6ff87d-2b65-488b-a27e-3e6c04887105
Zhang, Jiquan
cf0cf01c-73af-4c49-aa26-da6c46969a5b
Zhang, Meng
ed5e0d51-9f57-41c5-95ac-328fd19e9325
Li, Wenhao
3443c1e0-a1d2-42ae-9613-b48f570506a1
Wang, Shunbin
70976916-f2c8-4a61-b0ba-2cdd77286bea
Lewis, Elfed
efa2da37-80a3-4f42-9db9-4e79f0b7d16f
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb
Li, Angzhen
2a6ff87d-2b65-488b-a27e-3e6c04887105
Zhang, Jiquan
cf0cf01c-73af-4c49-aa26-da6c46969a5b
Zhang, Meng
ed5e0d51-9f57-41c5-95ac-328fd19e9325
Li, Wenhao
3443c1e0-a1d2-42ae-9613-b48f570506a1
Wang, Shunbin
70976916-f2c8-4a61-b0ba-2cdd77286bea
Lewis, Elfed
efa2da37-80a3-4f42-9db9-4e79f0b7d16f
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb

Li, Angzhen, Zhang, Jiquan, Zhang, Meng, Li, Wenhao, Wang, Shunbin, Lewis, Elfed, Brambilla, Gilberto and Wang, Pengfei (2018) Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers. Optics Letters, 43 (18), 4325-4328, [334574]. (doi:10.1364/OL.43.004325).

Record type: Article

Abstract

In this work, a Tm3-doped solgel silica microsphere lasing at 2.0 μm is reported. Microspheres with different Tm3 concentrations are fabricated by overlaying different Tm3 concentration solgel solutions on the surface of a pure silica microsphere resonator and then annealing the sample with a CO2 laser. Based on a traditional fiber taper–microsphere coupling method, single and multimode microsphere lasing in the wavelength range 1.8–2.0 μm is observed if an 808 nm laser diode is used as a pump source. A relatively low threshold pumping power of 1.2 mW is achieved using this arrangement. This solgel method allows for an easy varying of the Tm3 doping concentration. The observed laser output shifts to longer wavelengths when the Tm3 doping concentration increases. This has been explained by the larger Tm absorption at shorter wavelengths. The ability to fabricate solgel co-doped silica glass microlasers represents a new generation of low threshold and compact infrared laser sources for use as miniaturized photonic components for a wide range of applications, including gas sensing and medical surgery.

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Accepted/In Press date: 6 August 2018
e-pub ahead of print date: 9 August 2018
Published date: 15 September 2018

Identifiers

Local EPrints ID: 423542
URI: http://eprints.soton.ac.uk/id/eprint/423542
ISSN: 0146-9592
PURE UUID: d454a7bf-e255-492c-8278-f27d38eeab6e
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

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Date deposited: 25 Sep 2018 16:30
Last modified: 28 Apr 2022 01:48

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Contributors

Author: Angzhen Li
Author: Jiquan Zhang
Author: Meng Zhang
Author: Wenhao Li
Author: Shunbin Wang
Author: Elfed Lewis
Author: Pengfei Wang

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