Broadband third harmonic generation in tapered silica fibres
Broadband third harmonic generation in tapered silica fibres
Optical microfibres have recently attracted much attention for nonlinear applications, due to their tight modal confinement. Here, we report broadband third harmonic generation based on the intermodal phase matching technique in silica microfibres of several centimetres. The third harmonic signal is predominantly generated from the taper transition regions (rather than the waist), wherein the range of diameters permits phase matching over a wide bandwidth. Microfibres up to 4.5 cm long were fabricated with waist diameters below 2.5 µm to allow a lambda = 1.55 µm pump to phase match with several higher order third harmonic modes; conversion rates up to 3 x 10-4 were recorded when pumped with 4 ns pulses at a peak power of 1.25 kW. Analysis of the third harmonic frequencies generated from the nonlinearly broadened pump components indicate a 5 dB conversion bandwidth of at least 36 nm, with harmonic power detected over a 150 nm range.
8503-8511
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Jung, Yongmin
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Codemard, Christophe A.
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Ding, Ming
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Broderick, Neil G.R.
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Brambilla, Gilberto
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9 April 2012
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Codemard, Christophe A.
3aa50483-b61c-4e7e-b178-c9a88bb47bef
Ding, Ming
086b25a3-e5c3-4501-a90d-43d734e19344
Broderick, Neil G.R.
7a4d0b09-189a-4334-be7c-6afd80b7dc45
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Lee, Timothy, Jung, Yongmin, Codemard, Christophe A., Ding, Ming, Broderick, Neil G.R. and Brambilla, Gilberto
(2012)
Broadband third harmonic generation in tapered silica fibres.
Optics Express, 20 (8), .
(doi:10.1364/OE.20.008503).
Abstract
Optical microfibres have recently attracted much attention for nonlinear applications, due to their tight modal confinement. Here, we report broadband third harmonic generation based on the intermodal phase matching technique in silica microfibres of several centimetres. The third harmonic signal is predominantly generated from the taper transition regions (rather than the waist), wherein the range of diameters permits phase matching over a wide bandwidth. Microfibres up to 4.5 cm long were fabricated with waist diameters below 2.5 µm to allow a lambda = 1.55 µm pump to phase match with several higher order third harmonic modes; conversion rates up to 3 x 10-4 were recorded when pumped with 4 ns pulses at a peak power of 1.25 kW. Analysis of the third harmonic frequencies generated from the nonlinearly broadened pump components indicate a 5 dB conversion bandwidth of at least 36 nm, with harmonic power detected over a 150 nm range.
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Published date: 9 April 2012
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 337277
URI: http://eprints.soton.ac.uk/id/eprint/337277
ISSN: 1094-4087
PURE UUID: 28cc259e-fab5-4ce3-978d-d67df8978c06
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Date deposited: 20 Apr 2012 15:48
Last modified: 15 Mar 2024 03:31
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Author:
Ming Ding
Author:
Neil G.R. Broderick
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