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Analysis of acceptable spectral windows of quadratic cascaded nonlinear processes in a periodically poled lithium niobate waveguide

Analysis of acceptable spectral windows of quadratic cascaded nonlinear processes in a periodically poled lithium niobate waveguide
Analysis of acceptable spectral windows of quadratic cascaded nonlinear processes in a periodically poled lithium niobate waveguide
We report a systematic and comparative study of the acceptance bandwidths of two cascaded quadratic nonlinear processes in periodically poled lithium niobate waveguides, namely cascaded second-harmonic generation and difference-frequency generation (cSHG/DFG) and cascaded sum-frequency generation and difference-frequency generation (cSFG/DFG). We first theoretically and experimentally study the acceptance bandwidths of both the individual second-harmonic generation (SHG) and sum-frequency generation (SFG) processes in the continuous wave (CW) and pulsed-pump regimes. Our results show that the SHG bandwidth is approximately half that of the SFG process in the CW regime, whereas the SHG acceptance bandwidth can approach the CW SFG bandwidth limit when pulsed-pump is used. As a consequence we conclude that the tuning bandwidths of both cascaded processes should be similar in the pulsed pump regime once the pump pulse bandwidths approach that of SFG (i.e. the cSHG/DFG bandwidth is not limited by the CW SHG bandwidth). We confirm that this is the case experimentally.
1094-4087
8327-8335
Lee, Kwang Jo
9f3da7ff-7987-4113-972a-1c1eac169a83
Liu, Sheng
741afc1b-31b1-4fac-a2cb-38855fe8d6a3
Gallo, Katia
e9985849-7c3f-4e67-9eb3-d91514f96a9f
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Lee, Kwang Jo
9f3da7ff-7987-4113-972a-1c1eac169a83
Liu, Sheng
741afc1b-31b1-4fac-a2cb-38855fe8d6a3
Gallo, Katia
e9985849-7c3f-4e67-9eb3-d91514f96a9f
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Lee, Kwang Jo, Liu, Sheng, Gallo, Katia, Petropoulos, Periklis and Richardson, David J. (2011) Analysis of acceptable spectral windows of quadratic cascaded nonlinear processes in a periodically poled lithium niobate waveguide. Optics Express, 19 (9), 8327-8335. (doi:10.1364/OE.19.008327).

Record type: Article

Abstract

We report a systematic and comparative study of the acceptance bandwidths of two cascaded quadratic nonlinear processes in periodically poled lithium niobate waveguides, namely cascaded second-harmonic generation and difference-frequency generation (cSHG/DFG) and cascaded sum-frequency generation and difference-frequency generation (cSFG/DFG). We first theoretically and experimentally study the acceptance bandwidths of both the individual second-harmonic generation (SHG) and sum-frequency generation (SFG) processes in the continuous wave (CW) and pulsed-pump regimes. Our results show that the SHG bandwidth is approximately half that of the SFG process in the CW regime, whereas the SHG acceptance bandwidth can approach the CW SFG bandwidth limit when pulsed-pump is used. As a consequence we conclude that the tuning bandwidths of both cascaded processes should be similar in the pulsed pump regime once the pump pulse bandwidths approach that of SFG (i.e. the cSHG/DFG bandwidth is not limited by the CW SHG bandwidth). We confirm that this is the case experimentally.

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Published date: 15 April 2011
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 334102
URI: https://eprints.soton.ac.uk/id/eprint/334102
ISSN: 1094-4087
PURE UUID: 3524c6f6-f14d-4fee-974e-3d259aa84063
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 07 Mar 2012 11:42
Last modified: 10 Sep 2019 00:55

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Contributors

Author: Kwang Jo Lee
Author: Sheng Liu
Author: Katia Gallo

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