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Polymeric waveguides using oxidized porous silicon cladding for optical amplification

Polymeric waveguides using oxidized porous silicon cladding for optical amplification
Polymeric waveguides using oxidized porous silicon cladding for optical amplification
We report on a new hybrid approach to realize optical slab waveguides for optical amplification purposes. The structure consists of a dye-doped polymer core (PMMA) deposited over an oxidized porous silicon (PS) cladding layer formed on a silicon wafer. The very low refractive index (n = 1.16) achievable in the cladding allows obtaining monomodal behavior with high confinement factors (GTE = 96%) even for very thin cores (400 nm). Optically excited guided luminescence shows stimulated emission, strong line narrowing and a clear threshold and superlinear behavior with pump energy. By means of the variable stripe length (VSL) technique, values of net optical gain up to 113 dB/cm (constant over 3 mm) and absolute amplification values up to 34 dB have been measured at 694 nm when pumping with 80 mJ/cm2 energy pulses. These results validate the use of oxidized PS as a cladding layer in silicon photonics.
optical amplification, silicon, polymers, gain, laser dye
1488-1491
Navarro-Urrios, D.
cbdb468c-39fd-4c12-aa8a-9a3b18596177
Ghulinyan, M.
2af98575-1c04-4085-afaa-6d602a43cb79
Bettotti, P.
55fc41bc-75cd-45f0-a5ee-e934d9947d32
Rigo, E.
d5773111-4b87-4344-9958-62c6649db833
Oton, C.J.
cc559bbe-1b21-4aa7-81fc-63ba4a5a94c9
Capuj, N.E.
9074ca7e-dc90-47f3-88ca-05df67c345bc
Lahoz, F.
9852a047-43a2-4649-a3a0-eb0322d565b3
Martín, I.R.
a0afbe3f-561f-4db4-877c-dfc913fba9c7
Pavesi, L.
b8e21823-8e24-46bc-a740-88f10f4cae5b
Navarro-Urrios, D.
cbdb468c-39fd-4c12-aa8a-9a3b18596177
Ghulinyan, M.
2af98575-1c04-4085-afaa-6d602a43cb79
Bettotti, P.
55fc41bc-75cd-45f0-a5ee-e934d9947d32
Rigo, E.
d5773111-4b87-4344-9958-62c6649db833
Oton, C.J.
cc559bbe-1b21-4aa7-81fc-63ba4a5a94c9
Capuj, N.E.
9074ca7e-dc90-47f3-88ca-05df67c345bc
Lahoz, F.
9852a047-43a2-4649-a3a0-eb0322d565b3
Martín, I.R.
a0afbe3f-561f-4db4-877c-dfc913fba9c7
Pavesi, L.
b8e21823-8e24-46bc-a740-88f10f4cae5b

Navarro-Urrios, D., Ghulinyan, M., Bettotti, P., Rigo, E., Oton, C.J., Capuj, N.E., Lahoz, F., Martín, I.R. and Pavesi, L. (2009) Polymeric waveguides using oxidized porous silicon cladding for optical amplification. Optical Materials, 31 (10), 1488-1491. (doi:10.1016/j.optmat.2009.02.008).

Record type: Article

Abstract

We report on a new hybrid approach to realize optical slab waveguides for optical amplification purposes. The structure consists of a dye-doped polymer core (PMMA) deposited over an oxidized porous silicon (PS) cladding layer formed on a silicon wafer. The very low refractive index (n = 1.16) achievable in the cladding allows obtaining monomodal behavior with high confinement factors (GTE = 96%) even for very thin cores (400 nm). Optically excited guided luminescence shows stimulated emission, strong line narrowing and a clear threshold and superlinear behavior with pump energy. By means of the variable stripe length (VSL) technique, values of net optical gain up to 113 dB/cm (constant over 3 mm) and absolute amplification values up to 34 dB have been measured at 694 nm when pumping with 80 mJ/cm2 energy pulses. These results validate the use of oxidized PS as a cladding layer in silicon photonics.

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More information

Published date: August 2009
Keywords: optical amplification, silicon, polymers, gain, laser dye
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 357335
URI: http://eprints.soton.ac.uk/id/eprint/357335
PURE UUID: 5240ffaf-2cb1-46cb-8245-a41c2cb9756e

Catalogue record

Date deposited: 07 Oct 2013 13:05
Last modified: 16 Jul 2019 21:22

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