Third order nonlinearity of a PFCB polymer core rib waveguide

Moran B.I.N. Nun; Yedidya Lior; Dan M. Marom

doi:10.1364/OME.456280

Third order nonlinearity of a PFCB polymer core rib waveguide

Moran B.I.N. Nun^*, Yedidya Lior, Dan M. Marom

^*Corresponding author for this work

The Institute of Applied Physics

Research output: Contribution to journal › Article › peer-review

Abstract

PFCB is a semi-fluorinated polymer suitable for integrated optics due to its low absorption at the telecommunication wavelength range, compatibility with standard fabrication tools and processes, and thermomechanical robustness. In this work we report the fabrication and characterization of waveguides optimized for Kerr nonlinearity enhancement, comprised of PFCB core and optical-grade Cytop cladding having a 10% index contrast and supporting single-mode operation with an effective mode area of 4 µm². Propagation loss of 0.9 dB/cm and 1 dB/facet coupling loss using lensed optical fibers having 2.5 µm spot size were obtained, leading to an effective length of L_eff =0.82 cm. A nonlinear coefficient of γ=0.18 ± 0.03 (W·m)⁻¹ was measured for both TE and TM polarizations using a four-wave mixing arrangement about 1.55 µm, with no observed nonlinear absorption. A relatively high Kerr coefficient of |n₂|=1.9×10⁻¹⁵ cm²/W is derived for PFCB in the telecom wavelength range for the first time.

Original language	English
Pages (from-to)	2486-2496
Number of pages	11
Journal	Optical Materials Express
Volume	12
Issue number	7
DOIs	https://doi.org/10.1364/OME.456280
State	Published - 1 Jul 2022

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© 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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title = "Third order nonlinearity of a PFCB polymer core rib waveguide",

abstract = "PFCB is a semi-fluorinated polymer suitable for integrated optics due to its low absorption at the telecommunication wavelength range, compatibility with standard fabrication tools and processes, and thermomechanical robustness. In this work we report the fabrication and characterization of waveguides optimized for Kerr nonlinearity enhancement, comprised of PFCB core and optical-grade Cytop cladding having a 10% index contrast and supporting single-mode operation with an effective mode area of 4 µm2. Propagation loss of 0.9 dB/cm and 1 dB/facet coupling loss using lensed optical fibers having 2.5 µm spot size were obtained, leading to an effective length of Leff =0.82 cm. A nonlinear coefficient of γ=0.18 ± 0.03 (W·m)−1 was measured for both TE and TM polarizations using a four-wave mixing arrangement about 1.55 µm, with no observed nonlinear absorption. A relatively high Kerr coefficient of |n2|=1.9×10−15 cm2/W is derived for PFCB in the telecom wavelength range for the first time.",

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doi = "10.1364/OME.456280",

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AU - Nun, Moran B.I.N.

AU - Lior, Yedidya

AU - Marom, Dan M.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - PFCB is a semi-fluorinated polymer suitable for integrated optics due to its low absorption at the telecommunication wavelength range, compatibility with standard fabrication tools and processes, and thermomechanical robustness. In this work we report the fabrication and characterization of waveguides optimized for Kerr nonlinearity enhancement, comprised of PFCB core and optical-grade Cytop cladding having a 10% index contrast and supporting single-mode operation with an effective mode area of 4 µm2. Propagation loss of 0.9 dB/cm and 1 dB/facet coupling loss using lensed optical fibers having 2.5 µm spot size were obtained, leading to an effective length of Leff =0.82 cm. A nonlinear coefficient of γ=0.18 ± 0.03 (W·m)−1 was measured for both TE and TM polarizations using a four-wave mixing arrangement about 1.55 µm, with no observed nonlinear absorption. A relatively high Kerr coefficient of |n2|=1.9×10−15 cm2/W is derived for PFCB in the telecom wavelength range for the first time.

AB - PFCB is a semi-fluorinated polymer suitable for integrated optics due to its low absorption at the telecommunication wavelength range, compatibility with standard fabrication tools and processes, and thermomechanical robustness. In this work we report the fabrication and characterization of waveguides optimized for Kerr nonlinearity enhancement, comprised of PFCB core and optical-grade Cytop cladding having a 10% index contrast and supporting single-mode operation with an effective mode area of 4 µm2. Propagation loss of 0.9 dB/cm and 1 dB/facet coupling loss using lensed optical fibers having 2.5 µm spot size were obtained, leading to an effective length of Leff =0.82 cm. A nonlinear coefficient of γ=0.18 ± 0.03 (W·m)−1 was measured for both TE and TM polarizations using a four-wave mixing arrangement about 1.55 µm, with no observed nonlinear absorption. A relatively high Kerr coefficient of |n2|=1.9×10−15 cm2/W is derived for PFCB in the telecom wavelength range for the first time.

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Third order nonlinearity of a PFCB polymer core rib waveguide

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