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Cascaded counter-propagating nonlinear interactions in highly-efficient sub-mu m periodically poled crystals
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics.ORCID iD: 0000-0002-2508-391X
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 8037Article in journal (Refereed) Published
Abstract [en]

Mirrorless optical parametric oscillators (MOPOs) are very attractive parametric devices that rely on the nonlinear interaction of counter-propagating photons to inherently establish distributed feedback, without the use of external mirrors or surface coatings. These devices offer unique spectral and coherence properties that will benefit a large variety of applications ranging from spectroscopy to quantum communications. The major obstacle in exploiting their full potential is ascribed to the difficulty in engineering a nonlinear material in which the generation of counter-propagating waves can be phase matched. Here we present a reliable and consistent technique for fabrication of highly-efficient sub-micrometer periodically poled Rb-doped KTiOPO4. We experimentally demonstrate the first cascaded counter-propagating interactions in which the generated forward signal serves as a pump for a secondary MOPO process, reaching pump depletion larger than 60%. The cascaded process exemplifies the high efficiency of our nonlinear photonic structures. Our domain-engineering technique paves the way to realize counter-propagating schemes and devices that have been deemed unfeasible until now.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2017. Vol. 7, article id 8037
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Physical Sciences
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URN: urn:nbn:se:kth:diva-214337DOI: 10.1038/s41598-017-07016-yISI: 000407559800004PubMedID: 28808234Scopus ID: 2-s2.0-85027467506OAI: oai:DiVA.org:kth-214337DiVA, id: diva2:1140509
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QC 20170912

Available from: 2017-09-12 Created: 2017-09-12 Last updated: 2017-09-12Bibliographically approved

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Zukauskas, AndriusLiljestrand, CharlottePasiskevicius, ValdasCanalias, Carlota

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