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Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+:Sapphire

Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+:Sapphire
Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+:Sapphire
We have employed femtosecond laser writing in order to induce refractive-index changes and waveguides in Ti3+-doped sapphire. Doping the sapphire crystal with an appropriate ion significantly reduces the threshold for creating structural changes, thus enabling the writing of waveguide structures. Passive and active buried channel waveguiding is demonstrated and images of the guided modes, propagation-loss values, fluorescence spectra, and output efficiencies are presented. The guiding area is located around the laser-damaged region, indicating that the guiding effect is stress induced. Refractive-index changes are measured by digital holography. Proper active doping should enable femtosecond processing and waveguide writing in various crystalline materials.
0003-6951
1122-1124
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Laversenne, L.
08bf9feb-0fb3-49de-b3bd-3973083145da
Colomb, T.
31dbc35e-6eef-411e-9bda-417b2fe143c9
Depeursinge, C.
fe7864a4-9ddc-4d60-b487-441bf47b2fb6
Salathé, R.P.
ea67db6b-9d3a-4221-bb07-fc20064d2758
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Osellame, R.
6adf944c-1148-4a22-8ebe-f267a0c4ae52
Cerullo, G.
77bf7076-275a-4180-8521-3cd4af1629d9
Laporta, P.
74af9d0d-472b-4193-9720-ef6c53bb3923
Apostolopoulos, V.
8a898740-4c71-4040-a577-9b9d70530b4d
Laversenne, L.
08bf9feb-0fb3-49de-b3bd-3973083145da
Colomb, T.
31dbc35e-6eef-411e-9bda-417b2fe143c9
Depeursinge, C.
fe7864a4-9ddc-4d60-b487-441bf47b2fb6
Salathé, R.P.
ea67db6b-9d3a-4221-bb07-fc20064d2758
Pollnau, M.
1094856b-791a-4050-98d9-c07777d5f0f5
Osellame, R.
6adf944c-1148-4a22-8ebe-f267a0c4ae52
Cerullo, G.
77bf7076-275a-4180-8521-3cd4af1629d9
Laporta, P.
74af9d0d-472b-4193-9720-ef6c53bb3923

Apostolopoulos, V., Laversenne, L., Colomb, T., Depeursinge, C., Salathé, R.P., Pollnau, M., Osellame, R., Cerullo, G. and Laporta, P. (2004) Femtosecond-irradiation-induced refractive-index changes and channel waveguiding in bulk Ti3+:Sapphire. Applied Physics Letters, 85 (7), 1122-1124. (doi:10.1063/1.1781737).

Record type: Article

Abstract

We have employed femtosecond laser writing in order to induce refractive-index changes and waveguides in Ti3+-doped sapphire. Doping the sapphire crystal with an appropriate ion significantly reduces the threshold for creating structural changes, thus enabling the writing of waveguide structures. Passive and active buried channel waveguiding is demonstrated and images of the guided modes, propagation-loss values, fluorescence spectra, and output efficiencies are presented. The guiding area is located around the laser-damaged region, indicating that the guiding effect is stress induced. Refractive-index changes are measured by digital holography. Proper active doping should enable femtosecond processing and waveguide writing in various crystalline materials.

Full text not available from this repository.

More information

Published date: 16 August 2004
Additional Information: First time femtosecond changes the bulk of a hard crystalline material due to multi-photon absorption of the doping ion. Important for 3d optical circuit integration in crystalline materials.

Identifiers

Local EPrints ID: 46972
URI: http://eprints.soton.ac.uk/id/eprint/46972
ISSN: 0003-6951
PURE UUID: a6db7e12-89bc-47f5-8039-eb45fe616827
ORCID for V. Apostolopoulos: ORCID iD orcid.org/0000-0003-3733-2191

Catalogue record

Date deposited: 18 Jul 2007
Last modified: 17 Dec 2019 01:43

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