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Publications (10 of 18) Show all publications
Huang, M., Ren, H., Aktas, O., Shen, L., Wang, J., Hawkins, T. W., . . . Peacock, A. C. (2019). Fiber Integrated Wavelength Converter Based on a Silicon Core Fiber With a Nano-Spike Coupler. IEEE Photonics Technology Letters, 31(19), 1561-1564
Open this publication in new window or tab >>Fiber Integrated Wavelength Converter Based on a Silicon Core Fiber With a Nano-Spike Coupler
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2019 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 31, no 19, p. 1561-1564Article in journal (Refereed) Published
Abstract [en]

An all-fiber integrated nonlinear silicon photonic wavelength converter has been proposed and fabricated using the silicon core fiber platform. The silicon fiber was spliced directly to a conventional single mode fiber, facilitated via an inverse tapered nano-spike that helped to reduce the mode mismatch between the different core materials. Four-wave mixing-based wavelength conversion with an efficiency as high as -22.1 dB has been achieved for selected wavelengths across the C-band in a device length of only similar to 1 cm. Successful conversion of quadrature phase-shift keying signals at a 20-Gb/s bitrate, with a 1 to 2 dB penalty level at the bit error ratio (BER) = 3.8 x 10(-3), was used to demonstrate the suitability of the silicon fiber device for the construction of ultra-compact, all-fiber-based optical signal processing systems.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2019
Keywords
Silicon photonics, wavelength converters, four-wave mixing, nonlinear fiber optics, fiber design and fabrication, fiber materials
National Category
Telecommunications
Research subject
Telecommunication
Identifiers
urn:nbn:se:kth:diva-261944 (URN)10.1109/LPT.2019.2937650 (DOI)000487202200003 ()2-s2.0-85072518553 (Scopus ID)
Note

QC 20191015

Available from: 2019-10-15 Created: 2019-10-15 Last updated: 2019-11-26Bibliographically approved
Wu, W., Balci, M. H., Muhlberger, K., Fokine, M., Laurell, F., Hawkins, T., . . . Gibson, U. J. (2019). Ge-capped SiGe core optical fibers. Optical Materials Express, 9(11), 4301-4306
Open this publication in new window or tab >>Ge-capped SiGe core optical fibers
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2019 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 9, no 11, p. 4301-4306Article in journal (Refereed) Published
Abstract [en]

CO2 laser processing offers the possibility to inscribe structures within glass-clad SiGe-core fibers by altering the spatial distribution of the Si and Ge. Spatial segregation of Ge to the end of a fiber is shown via optical transmission measurements used to alter the local bandgap, and the curved end of the fiber focuses the output of a multimode fiber. Scalable fabrication is demonstrated using a commercial CO2 laser engraver for processing of arrays.

Place, publisher, year, edition, pages
OPTICAL SOC AMER, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-264311 (URN)10.1364/OME.9.004301 (DOI)000493994700016 ()2-s2.0-85076559856 (Scopus ID)
Note

QC 20191202

Available from: 2019-12-02 Created: 2019-12-02 Last updated: 2020-01-02Bibliographically approved
Song, S., Lonsethagen, K., Laurell, F., Hawkins, T. W., Ballato, J., Fokine, M. & Gibson, U. J. (2019). Laser restructuring and photoluminescence of glass-clad GaSb/Si-core optical fibres. Nature Communications, 10, Article ID 1790.
Open this publication in new window or tab >>Laser restructuring and photoluminescence of glass-clad GaSb/Si-core optical fibres
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 1790Article in journal (Refereed) Published
Abstract [en]

Semiconductor-core optical fibres have potential applications in photonics and optoelectronics due to large nonlinear optical coefficients and an extended transparency window. Laser processing can impose large temperature gradients, an ability that has been used to improve the uniformity of unary fibre cores, and to inscribe compositional variations in alloy systems. Interest in an integrated light-emitting element suggests a move from Group IV to III-V materials, or a core that contains both. This paper describes the fabrication of GaSb/Si core fibres, and a subsequent CO2 laser treatment that aggregates large regions of GaSb without suppressing room temperature photoluminescence. The ability to isolate a large III-V crystalline region within the Si core is an important step towards embedding semiconductor light sources within infrared light-transmitting silicon optical fibre.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-251483 (URN)10.1038/s41467-019-09835-1 (DOI)000464976200003 ()30996257 (PubMedID)2-s2.0-85064540314 (Scopus ID)
Note

QC 20190522

Available from: 2019-05-22 Created: 2019-05-22 Last updated: 2019-05-29Bibliographically approved
Wu, D., Shen, L., Ren, H., Campling, J., Hawkins, T. W., Ballato, J., . . . Peacock, A. C. (2019). Net optical parametric gain in a submicron silicon core fiber pumped in the telecom band. APL PHOTONICS, 4(8), Article ID 086102.
Open this publication in new window or tab >>Net optical parametric gain in a submicron silicon core fiber pumped in the telecom band
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2019 (English)In: APL PHOTONICS, ISSN 2378-0967, Vol. 4, no 8, article id 086102Article in journal (Refereed) Published
Abstract [en]

A silicon core fiber (SCF) has been designed and fabricated with a dispersion engineered profile to support broadband optical parametric amplification across the telecom window. The combination of low optical transmission losses and high coupling efficiency of the SCF platform has allowed for an on-off optical parametric gain up to 9 dB, without experiencing gain saturation due to nonlinear absorption, resulting in a net off-waveguide gain of similar to 2 dB. The ability to splice the SCFs with conventional silica fiber systems opens a route to compact and robust all-fiber integrated optical parametric amplifiers and oscillators that could find use in telecoms systems.

Place, publisher, year, edition, pages
AMER INST PHYSICS, 2019
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-260203 (URN)10.1063/1.5103272 (DOI)000483883700002 ()2-s2.0-85071523050 (Scopus ID)
Note

QC 20190930

Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-09-30Bibliographically approved
Ren, H., Shen, L., Wu, D., Aktas, O., Hawkins, T., Ballato, J., . . . Peacock, A. C. (2019). Nonlinear optical properties of polycrystalline silicon core fibers from telecom wavelengths into the mid-infrared spectral region. Optical Materials Express, 9(3), 1271-1279
Open this publication in new window or tab >>Nonlinear optical properties of polycrystalline silicon core fibers from telecom wavelengths into the mid-infrared spectral region
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2019 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 9, no 3, p. 1271-1279Article in journal (Refereed) Published
Abstract [en]

Polycrystalline silicon core fibers (SCFs) fabricated via the molten core drawing (MCD) method are emerging as a flexible optoelectronic platform. Here, the optical transmission properties of MCD SCFs that have been tapered down to a few micrometer-sized core dimensions are characterized from the telecom band to the mid-infrared spectal regime. The SCFs exhibit low linear losses on the order of a few dB/cm over the entire wavelength range. Characterization of the two-photon absorption coefficient (beta(TPA)) and nonlinear refractive index (n(2)) of the SCFs reveals values consistent with previous measurements of single crystal silicon materials, indicating the high optical quality of the polysilicon core material. The high nonlinear figure of merit obtained for wavelengths above 2 mu m highlight the potential for these fibers to find application in infrared nonlinear photonics. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

Place, publisher, year, edition, pages
OPTICAL SOC AMER, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-247832 (URN)10.1364/OME.9.001271 (DOI)000460134500030 ()2-s2.0-85071365505 (Scopus ID)
Note

QC 20190326

Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-10-04Bibliographically approved
Gibson, U. J. (2018). Advances in semiconductor-core fibers. In: Optics InfoBase Conference Papers: . Paper presented at Advanced Solid State Lasers, ASSL 2018; Boston; United States; 4 November 2018 through 8 November 2018. Optical Society of America
Open this publication in new window or tab >>Advances in semiconductor-core fibers
2018 (English)In: Optics InfoBase Conference Papers, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Silicon, silicon-germanium and GaSb-core fibers fabricated with the molten-core drawing technique demonstrate non-linear effects, long wavelength transmission, and potential as fiber-based sources. Material processing aspects of these fibers will be discussed.

Place, publisher, year, edition, pages
Optical Society of America, 2018
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-246520 (URN)10.1364/ASSL.2018.ATh1A.1 (DOI)2-s2.0-85059445101 (Scopus ID)9781943580484 (ISBN)
Conference
Advanced Solid State Lasers, ASSL 2018; Boston; United States; 4 November 2018 through 8 November 2018
Note

QC 20190321

Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-03-21Bibliographically approved
Song, S., Healy, N., Svendsen, S. K., Osterberg, U. L., Covian, A. V., Liu, J., . . . Gibson, U. J. (2018). Crystalline GaSb-core optical fibers with room-temperature photoluminescence. Optical Materials Express, 8(6), 1435-1440
Open this publication in new window or tab >>Crystalline GaSb-core optical fibers with room-temperature photoluminescence
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2018 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 8, no 6, p. 1435-1440Article in journal (Refereed) Published
Abstract [en]

Glass-clad, GaSb-core fibers were drawn and subsequently laser annealed. The as-drawn fibers were found to be polycrystalline, possess Sb inclusions, and have oxide contamination concentrations of less than 3 at%. Melting and resolidifying regions in the cores using 10.6 mu m CO2 laser radiation yielded single crystalline zones with enhanced photoluminescence (PL), including the first observation of strong room temperature PL from a crystalline core fiber. Annealed fibers show low values of tensile strain and a bandgap close to that of bulk GaSb. 

Place, publisher, year, edition, pages
OPTICAL SOC AMER, 2018
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-230829 (URN)10.1364/OME.8.001435 (DOI)000433955300004 ()2-s2.0-85047063477 (Scopus ID)
Note

QC 20180619

Available from: 2018-06-19 Created: 2018-06-19 Last updated: 2019-08-20Bibliographically approved
Gibson, U. J., Ballato, J., Peacock, A., Laurell, F. & Fokine, M. (2018). Future of semiconductor-core optical fibers. In: Optics InfoBase Conference Papers: . Paper presented at Specialty Optical Fibers, SOF 2018, 2 July 2018 through 5 July 2018. OSA - The Optical Society
Open this publication in new window or tab >>Future of semiconductor-core optical fibers
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2018 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Semiconductor-core optical fibers hold promise for long wavelength transmission systems as well as for nonlinear and active optoelectronic devices. This talk includes a status report on fiber properties and a prospectus of some future directions.

Place, publisher, year, edition, pages
OSA - The Optical Society, 2018
Keywords
Optoelectronic devices, Semiconductor devices, Fiber properties, Long wavelength, Optical fibers
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-236447 (URN)10.1364/SOF.2018.SoM2H.1 (DOI)2-s2.0-85051267741 (Scopus ID)9781557528209 (ISBN)
Conference
Specialty Optical Fibers, SOF 2018, 2 July 2018 through 5 July 2018
Note

QC 20181022

Available from: 2018-10-22 Created: 2018-10-22 Last updated: 2018-10-22Bibliographically approved
Aktas, O., Ren, H., Runge, A. F., Peacock, A. C., Hawkins, T., Ballato, J. & Gibson, U. J. (2018). Interfacing telecom fibers and silicon core fibers with nano-spikes for in-fiber silicon devices. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017. Optics Info Base, Optical Society of America, Article ID u12d3i3m.
Open this publication in new window or tab >>Interfacing telecom fibers and silicon core fibers with nano-spikes for in-fiber silicon devices
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2018 (English)In: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018, article id u12d3i3mConference paper, Published paper (Refereed)
Abstract [en]

We report fabrication of tapered silicon core fibers with nano-spikes enabling efficient optical coupling into the core, as well as their seamless integration with single mode fibers. A proof-of-concept integrated in-fiber silicon device is demonstrated. © OSA 2018.

Place, publisher, year, edition, pages
Optics Info Base, Optical Society of America, 2018
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-229349 (URN)10.1364/OFC.2018.W4K.6 (DOI)2-s2.0-85047115791 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017
Note

QC 20180604

Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-06-04Bibliographically approved
Aktas, O., Ren, H., Runge, A. F., Peacock, A. C., Hawkins, T., Ballato, J. & Gibson, U. J. (2018). Interfacing Telecom Fibers and Silicon Core Fibers with Nano-Spikes for In-Fiber Silicon Devices. In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings: . Paper presented at 2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Interfacing Telecom Fibers and Silicon Core Fibers with Nano-Spikes for In-Fiber Silicon Devices
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2018 (English)In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2018Conference paper, Published paper (Refereed)
Abstract [en]

We report fabrication of tapered silicon core fibers with nano-spikes enabling efficient optical coupling into the core, as well as their seamless integration with single mode fibers. A proof-of-concept integrated in-fiber silicon device is demonstrated.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-232640 (URN)000437286300546 ()2-s2.0-85050020757 (Scopus ID)9781943580385 (ISBN)
Conference
2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018
Note

QC 20180802

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2019-10-10Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-8548-8791

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