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Collisions between two dimensional quadratic spatial solitons in PPLN

Collisions between two dimensional quadratic spatial solitons in PPLN
Collisions between two dimensional quadratic spatial solitons in PPLN
Self-guided waves (spatial solitons) that can be excited in quadratic nonlinear media have been extensively studied for their potential applications in ultra-fast all-optical processing. We have previously reported the use of solitary waves collision in a KTP crystal to experimentally demonstrate all-optical switching of infrared picosecond pulses. Up to now, the intensity required to obtain self-trapping of a beam remained at a high level. This has been due to the lack of nonlinear crystals which combine the attributes of a large nonlinearity and phase-matching capability at experimentally convenient wavelengths. The availability of Periodically Poled Lithium Niobate can circumvent this difficulty. Two-dimensional spatial solitary waves in PPLN have been predicted theoretically and simulated numerically. In this communication we will report their experimental observation and for the first time their interaction in a 15mm long crystal. Then we will compare solitary wave behaviour in KTP and PPLN, in particular self-trapping intensity threshold versus phase mismatch. We will also compare experimental data with the results of our computations modelling. In a last part we will show our first experimental results about 2D quadratic soliton collision in a PPLN crystal. Finally we will discuss the advantages of choosing PPLN to realise all-optical devices using solitary wave interactions.
Barthelemy, A.
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Bourliaguet, B.
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Couderc, V.
dcb8885b-948c-476b-a7ea-85555ccee061
De Angelis, C.
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Gringoli, F.
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Ross, G.W.
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Smith, P.G.R.
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Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d
Barthelemy, A.
35351407-c0a8-4cb2-b9ea-b622cf72e0ca
Bourliaguet, B.
84650c62-7768-45c6-80fd-afcc9bc82a9d
Couderc, V.
dcb8885b-948c-476b-a7ea-85555ccee061
De Angelis, C.
17ec2843-815d-4b17-b842-a9cea5160919
Gringoli, F.
e25a2bba-00f7-489d-a7c3-73035a67cddd
Ross, G.W.
e881119e-2126-442e-a24d-506dac48a4a4
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d

Barthelemy, A., Bourliaguet, B., Couderc, V., De Angelis, C., Gringoli, F., Ross, G.W., Smith, P.G.R. and Hanna, D.C. (2000) Collisions between two dimensional quadratic spatial solitons in PPLN. SPIE.

Record type: Conference or Workshop Item (Paper)

Abstract

Self-guided waves (spatial solitons) that can be excited in quadratic nonlinear media have been extensively studied for their potential applications in ultra-fast all-optical processing. We have previously reported the use of solitary waves collision in a KTP crystal to experimentally demonstrate all-optical switching of infrared picosecond pulses. Up to now, the intensity required to obtain self-trapping of a beam remained at a high level. This has been due to the lack of nonlinear crystals which combine the attributes of a large nonlinearity and phase-matching capability at experimentally convenient wavelengths. The availability of Periodically Poled Lithium Niobate can circumvent this difficulty. Two-dimensional spatial solitary waves in PPLN have been predicted theoretically and simulated numerically. In this communication we will report their experimental observation and for the first time their interaction in a 15mm long crystal. Then we will compare solitary wave behaviour in KTP and PPLN, in particular self-trapping intensity threshold versus phase mismatch. We will also compare experimental data with the results of our computations modelling. In a last part we will show our first experimental results about 2D quadratic soliton collision in a PPLN crystal. Finally we will discuss the advantages of choosing PPLN to realise all-optical devices using solitary wave interactions.

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Published date: 2000
Venue - Dates: SPIE, 2000-01-01

Identifiers

Local EPrints ID: 16904
URI: https://eprints.soton.ac.uk/id/eprint/16904
PURE UUID: 4595a208-ceb1-4b75-a6ad-a226e70bded3

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Date deposited: 17 Aug 2005
Last modified: 19 Jul 2019 19:17

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