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Femtosecond laser-inscribed non-volatile integrated optical switch in fused silica based on microfluidics-controlled total internal reflection

(2020) JOURNAL OF LIGHTWAVE TECHNOLOGY. 38(15). p.3965-3973
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Abstract
We demonstrate a non-volatile optical power switch, fabricated by femtosecond laser inscription in a fused silica substrate, with switching operation based on microfluidics-controlled total internal reflection. The switch consists of crossed waveguides and a rectangular, high aspect ratio microfluidic channel, located at the waveguide crossing. The switching between total internal reflection and transmission at the channel wall is determined by the refractive index of the medium inside the channel. Femtosecond laser inscription allows for co-integration of low-loss optical waveguides and channels with smooth sidewalls and thus the fabrication of low insertion loss switches that are broadband and show low polarization dependent losses. The measured total internal reflection loss of the fabricated switch is about 1.5dB at the wavelength 1550 nm. The loss due to transmission through the channel filled with refractive index matching liquid is about 0.5 dB. Detailed finite difference time domain and beam propagation method simulations of the switch's performance indicate that the losses can be further reduced by optimizing its geometry, together with further adjusting the inscription parameters.
Keywords
WAVE-GUIDES, POLARIZATION, FABRICATION, CHANNELS, Femtosecond laser inscription, fused silica, microfluidics, non-volatile, integrated optical switch, single mode waveguides, total internal, reflection

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MLA
Radosavljevic, Ana, et al. “Femtosecond Laser-Inscribed Non-Volatile Integrated Optical Switch in Fused Silica Based on Microfluidics-Controlled Total Internal Reflection.” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 38, no. 15, 2020, pp. 3965–73, doi:10.1109/JLT.2020.2983109.
APA
Radosavljevic, A., Desmet, A., Missinne, J., Saurav, K., Panapakkam, V., Tuccio, S., … Van Steenberge, G. (2020). Femtosecond laser-inscribed non-volatile integrated optical switch in fused silica based on microfluidics-controlled total internal reflection. JOURNAL OF LIGHTWAVE TECHNOLOGY, 38(15), 3965–3973. https://doi.org/10.1109/JLT.2020.2983109
Chicago author-date
Radosavljevic, Ana, Andres Desmet, Jeroen Missinne, Kumar Saurav, Vivek Panapakkam, Salvatore Tuccio, Cristina Lerma Arce, Jan Watte, Dries Van Thourhout, and Geert Van Steenberge. 2020. “Femtosecond Laser-Inscribed Non-Volatile Integrated Optical Switch in Fused Silica Based on Microfluidics-Controlled Total Internal Reflection.” JOURNAL OF LIGHTWAVE TECHNOLOGY 38 (15): 3965–73. https://doi.org/10.1109/JLT.2020.2983109.
Chicago author-date (all authors)
Radosavljevic, Ana, Andres Desmet, Jeroen Missinne, Kumar Saurav, Vivek Panapakkam, Salvatore Tuccio, Cristina Lerma Arce, Jan Watte, Dries Van Thourhout, and Geert Van Steenberge. 2020. “Femtosecond Laser-Inscribed Non-Volatile Integrated Optical Switch in Fused Silica Based on Microfluidics-Controlled Total Internal Reflection.” JOURNAL OF LIGHTWAVE TECHNOLOGY 38 (15): 3965–3973. doi:10.1109/JLT.2020.2983109.
Vancouver
1.
Radosavljevic A, Desmet A, Missinne J, Saurav K, Panapakkam V, Tuccio S, et al. Femtosecond laser-inscribed non-volatile integrated optical switch in fused silica based on microfluidics-controlled total internal reflection. JOURNAL OF LIGHTWAVE TECHNOLOGY. 2020;38(15):3965–73.
IEEE
[1]
A. Radosavljevic et al., “Femtosecond laser-inscribed non-volatile integrated optical switch in fused silica based on microfluidics-controlled total internal reflection,” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 38, no. 15, pp. 3965–3973, 2020.
@article{8683489,
  abstract     = {{We demonstrate a non-volatile optical power switch, fabricated by femtosecond laser inscription in a fused silica substrate, with switching operation based on microfluidics-controlled total internal reflection. The switch consists of crossed waveguides and a rectangular, high aspect ratio microfluidic channel, located at the waveguide crossing. The switching between total internal reflection and transmission at the channel wall is determined by the refractive index of the medium inside the channel. Femtosecond laser inscription allows for co-integration of low-loss optical waveguides and channels with smooth sidewalls and thus the fabrication of low insertion loss switches that are broadband and show low polarization dependent losses. The measured total internal reflection loss of the fabricated switch is about 1.5dB at the wavelength 1550 nm. The loss due to transmission through the channel filled with refractive index matching liquid is about 0.5 dB. Detailed finite difference time domain and beam propagation method simulations of the switch's performance indicate that the losses can be further reduced by optimizing its geometry, together with further adjusting the inscription parameters.}},
  author       = {{Radosavljevic, Ana and Desmet, Andres and Missinne, Jeroen and Saurav, Kumar and Panapakkam, Vivek and Tuccio, Salvatore and Arce, Cristina Lerma and Watte, Jan and Van Thourhout, Dries and Van Steenberge, Geert}},
  issn         = {{0733-8724}},
  journal      = {{JOURNAL OF LIGHTWAVE TECHNOLOGY}},
  keywords     = {{WAVE-GUIDES,POLARIZATION,FABRICATION,CHANNELS,Femtosecond laser inscription,fused silica,microfluidics,non-volatile,integrated optical switch,single mode waveguides,total internal,reflection}},
  language     = {{eng}},
  number       = {{15}},
  pages        = {{3965--3973}},
  title        = {{Femtosecond laser-inscribed non-volatile integrated optical switch in fused silica based on microfluidics-controlled total internal reflection}},
  url          = {{http://dx.doi.org/10.1109/JLT.2020.2983109}},
  volume       = {{38}},
  year         = {{2020}},
}

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