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Investigation of red-shift of an Er:Yb:Kigre phosphate glass microchip laser at 1535nm due to pump thermal loading

Investigation of red-shift of an Er:Yb:Kigre phosphate glass microchip laser at 1535nm due to pump thermal loading
Investigation of red-shift of an Er:Yb:Kigre phosphate glass microchip laser at 1535nm due to pump thermal loading
Er:Yb doped phosphate glass microlasers have received attractive interests, and significant progress has been achieved in the past decade, as described in a recent review. Although a lot of papers have been published on such type lasers, most of them concern merely on the laser performance such as threshold, slope efficiency as well as cavity designs. In this paper, emission cross section spectrum of the transition from 4I13/2 to 4I15/2 was experimentally measured in an Er:Yb codoped Kigre phosphate glass microchip, and the absorption cross section spectrum was derived using the McCumber theory. Based on these absolute cross section spectra, the gain spectrum was calculated in terms of different pumping ratios, which allows to determine the maximum lasing wavelength around 1535 nm and the total cavity loss being equal to 0.151 cm-1. Both values are in good agreement with direct measurements. Under pumping with a Ti:sapphire laser at 975 nm, a high performance microchip laser at 1535 nm was realized with a low threshold of 5 mW and a high slope efficiency of 22% as well as a maximum output power of 22 mW operating in single frequency at 130 mW incident pump power. Red-shift effect of the 1535 nm microchip laser was also experimentally observed as the pump power was increased, as shown in Fig.1, and this is believed to originate from a compromise between the thermally induced expansion of the cavity and the change of refractive index due to temperature variation.
Cai, Z.P.
790d2a11-498e-4862-8e7a-42651c7d53b8
Chardon, A.
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Xu, H.Y.
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Feron, P.
68bc1f5d-c632-4f18-abce-b4e568ba0d08
Stephan, G.M.
8e7dcd6c-ba24-481a-aeae-a86a71d00a1a
Cai, Z.P.
790d2a11-498e-4862-8e7a-42651c7d53b8
Chardon, A.
6e99d332-9c21-4281-b36c-80fdfe44f452
Xu, H.Y.
8852bedd-a501-41db-896a-43f93e4f04d8
Feron, P.
68bc1f5d-c632-4f18-abce-b4e568ba0d08
Stephan, G.M.
8e7dcd6c-ba24-481a-aeae-a86a71d00a1a

Cai, Z.P., Chardon, A., Xu, H.Y., Feron, P. and Stephan, G.M. (2001) Investigation of red-shift of an Er:Yb:Kigre phosphate glass microchip laser at 1535nm due to pump thermal loading. CLEO/Europe-EQEC 2001: The 4th Pacific Rim Conference on Lasers and Electro-Optics, 2001, Munich, Germany. 17 - 21 Jun 2001. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Er:Yb doped phosphate glass microlasers have received attractive interests, and significant progress has been achieved in the past decade, as described in a recent review. Although a lot of papers have been published on such type lasers, most of them concern merely on the laser performance such as threshold, slope efficiency as well as cavity designs. In this paper, emission cross section spectrum of the transition from 4I13/2 to 4I15/2 was experimentally measured in an Er:Yb codoped Kigre phosphate glass microchip, and the absorption cross section spectrum was derived using the McCumber theory. Based on these absolute cross section spectra, the gain spectrum was calculated in terms of different pumping ratios, which allows to determine the maximum lasing wavelength around 1535 nm and the total cavity loss being equal to 0.151 cm-1. Both values are in good agreement with direct measurements. Under pumping with a Ti:sapphire laser at 975 nm, a high performance microchip laser at 1535 nm was realized with a low threshold of 5 mW and a high slope efficiency of 22% as well as a maximum output power of 22 mW operating in single frequency at 130 mW incident pump power. Red-shift effect of the 1535 nm microchip laser was also experimentally observed as the pump power was increased, as shown in Fig.1, and this is believed to originate from a compromise between the thermally induced expansion of the cavity and the change of refractive index due to temperature variation.

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More information

e-pub ahead of print date: 2001
Additional Information: C-PSL106
Venue - Dates: CLEO/Europe-EQEC 2001: The 4th Pacific Rim Conference on Lasers and Electro-Optics, 2001, Munich, Germany, 2001-06-17 - 2001-06-21

Identifiers

Local EPrints ID: 17164
URI: http://eprints.soton.ac.uk/id/eprint/17164
PURE UUID: 802348d1-2612-41bf-a483-db6f5194d0d0

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Date deposited: 16 Sep 2005
Last modified: 11 Dec 2021 14:11

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Contributors

Author: Z.P. Cai
Author: A. Chardon
Author: H.Y. Xu
Author: P. Feron
Author: G.M. Stephan

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