Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
S.-H. Jeong, “Broadband operating 1 × 8 channel silicon-nanowire-waveguide WDM filter based on point-symmetric Mach–Zehnder interferometric optical couplers in the O-band spectral regime,” OSA Continuum., vol. 2, no. 12, pp. 3564–3575, 2019.
T. Horikawa, “A 300-mm silicon photonics platform for large-scale device integration,” IEEE J. Lightwave Technol., vol. 24, no. 4, 2018, Art. no. .
S.-H. Jeong and Y. Tanaka, “Silicon-wire delayed interferometric wavelength-division multiplexing filters operating in the broadband spectral range,” J. Opt. Soc. Am. (B), vol. 35, no. 8, pp. 1871–1877, 2018.
S.-H. Jeong and Y. Tanaka, “Silicon-wire optical demultiplexers based on multistage delayed Mach–Zehnder interferometers for higher production yield,” Appl. Opt., vol. 57, no. 22, pp. 6474–6480, 2018.
Q. Cheng, M. Bahadori, M. Glick, S. Rumley, and K. Bergman, “Recent advances in optical technologies for data centers: a review,” Optica, vol. 5, no. 11, pp. 1354–1370, 2018.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
Q. Fang, “A high-crosstalk silicon photonic arrayed waveguide grating,” Proc. Int. J. Electron. Commun. Eng., vol. 10, no. 3, pp. 372–373, 2016.
S.-H. Jeong and K. Morito, “1 × 4 channel Si-nanowire microring-assisted multiple delayline-based optical MUX/DeMUX,” IEEE J. Lightwave Technol., vol. 33, no. 17, pp. 3736–3743, 2015.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
C. R. Doerr, “Silicon photonic integration in telecommunications,” Front. Phys., vol. 3, no. 37, pp. 1–16, 2015.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
J. Wang, “Low-loss and low-crosstalk 8 × 8 silicon nanowire AWG routers fabricated with CMOS technology,” Opt. Express, vol. 22 no. 8, pp. 9395–9403, 2014.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
S.-H. Jeong, “Low-loss, flat-topped and spectral uniform silicon-nanowire-based 5th order CROW fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Express, vol. 21, no. 22, pp. 30163–30174, 2013.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
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Q. Cheng, M. Bahadori, M. Glick, S. Rumley, and K. Bergman, “Recent advances in optical technologies for data centers: a review,” Optica, vol. 5, no. 11, pp. 1354–1370, 2018.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
Q. Cheng, M. Bahadori, M. Glick, S. Rumley, and K. Bergman, “Recent advances in optical technologies for data centers: a review,” Optica, vol. 5, no. 11, pp. 1354–1370, 2018.
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L. Chen, C. Doerr, and Y. Chen, “Polarization diversified DWDM receiver on silicon free of polarization dependent wavelength shift,” in Proc. Opt. Fiber Commun. Conf., Mar. 2012, Art. no. .
Q. Cheng, M. Bahadori, M. Glick, S. Rumley, and K. Bergman, “Recent advances in optical technologies for data centers: a review,” Optica, vol. 5, no. 11, pp. 1354–1370, 2018.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
M. K. Smit and V. C. Dam, “PHASAR-based WDM-devices: Principles, design and applications,” IEEE J. Sel. Top. Quantum Electron., vol. 2, no. 2, pp. 236–250, 1996.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
L. Chen, C. Doerr, and Y. Chen, “Polarization diversified DWDM receiver on silicon free of polarization dependent wavelength shift,” in Proc. Opt. Fiber Commun. Conf., Mar. 2012, Art. no. .
C. R. Doerr, “Silicon photonic integration in telecommunications,” Front. Phys., vol. 3, no. 37, pp. 1–16, 2015.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
R. -J. Essiambre and R. W. Tkach, “Capacity trends and limit of optical communication networks,” Proc. IEEE, vol. 100, no. 5, pp. 1035–1055, 2012.
Q. Fang, “A high-crosstalk silicon photonic arrayed waveguide grating,” Proc. Int. J. Electron. Commun. Eng., vol. 10, no. 3, pp. 372–373, 2016.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
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Q. Cheng, M. Bahadori, M. Glick, S. Rumley, and K. Bergman, “Recent advances in optical technologies for data centers: a review,” Optica, vol. 5, no. 11, pp. 1354–1370, 2018.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
M. Abe, Y. Hibino, T. Tanaka, M. Itoh, A. Himeno, and Y. Ohmori, “Mach–Zehnder interferometer and arrayed waveguide-grating integrated multi/demultiplexer with photosensitive wavelength tuning,” Electron. Lett., vol. 37 no. 6, pp. 376–377, 2001.
M. Abe, Y. Hibino, T. Tanaka, M. Itoh, A. Himeno, and Y. Ohmori, “Mach–Zehnder interferometer and arrayed waveguide-grating integrated multi/demultiplexer with photosensitive wavelength tuning,” Electron. Lett., vol. 37 no. 6, pp. 376–377, 2001.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
T. Horikawa, “A 300-mm silicon photonics platform for large-scale device integration,” IEEE J. Lightwave Technol., vol. 24, no. 4, 2018, Art. no. .
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
M. Abe, Y. Hibino, T. Tanaka, M. Itoh, A. Himeno, and Y. Ohmori, “Mach–Zehnder interferometer and arrayed waveguide-grating integrated multi/demultiplexer with photosensitive wavelength tuning,” Electron. Lett., vol. 37 no. 6, pp. 376–377, 2001.
S.-H. Jeong, “Broadband operating 1 × 8 channel silicon-nanowire-waveguide WDM filter based on point-symmetric Mach–Zehnder interferometric optical couplers in the O-band spectral regime,” OSA Continuum., vol. 2, no. 12, pp. 3564–3575, 2019.
S.-H. Jeong and Y. Tanaka, “Silicon-wire optical demultiplexers based on multistage delayed Mach–Zehnder interferometers for higher production yield,” Appl. Opt., vol. 57, no. 22, pp. 6474–6480, 2018.
S.-H. Jeong and Y. Tanaka, “Silicon-wire delayed interferometric wavelength-division multiplexing filters operating in the broadband spectral range,” J. Opt. Soc. Am. (B), vol. 35, no. 8, pp. 1871–1877, 2018.
S.-H. Jeong and K. Morito, “1 × 4 channel Si-nanowire microring-assisted multiple delayline-based optical MUX/DeMUX,” IEEE J. Lightwave Technol., vol. 33, no. 17, pp. 3736–3743, 2015.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
S.-H. Jeong, “Low-loss, flat-topped and spectral uniform silicon-nanowire-based 5th order CROW fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Express, vol. 21, no. 22, pp. 30163–30174, 2013.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
H. -C. Lu and W. -S. Wang, “Cyclic arrayed waveguide grating devices with flat-top passband and uniform spectral response,” IEEE Photon. Technol. Lett., vol. 20, no. 1, pp. 3–5, 2008.
S.-H. Jeong and K. Morito, “1 × 4 channel Si-nanowire microring-assisted multiple delayline-based optical MUX/DeMUX,” IEEE J. Lightwave Technol., vol. 33, no. 17, pp. 3736–3743, 2015.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
D. W. Kim, A. Barkai, R. Jones, N. Elek, H. Nguyen, and A. Liu, “Silicon-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach–Zehnder interferometers,” Opt. Lett., vol. 33, no. 5, pp. 530–532, 2008.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
M. Abe, Y. Hibino, T. Tanaka, M. Itoh, A. Himeno, and Y. Ohmori, “Mach–Zehnder interferometer and arrayed waveguide-grating integrated multi/demultiplexer with photosensitive wavelength tuning,” Electron. Lett., vol. 37 no. 6, pp. 376–377, 2001.
Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
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Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
M. K. Smit and V. C. Dam, “PHASAR-based WDM-devices: Principles, design and applications,” IEEE J. Sel. Top. Quantum Electron., vol. 2, no. 2, pp. 236–250, 1996.
Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
M. Abe, Y. Hibino, T. Tanaka, M. Itoh, A. Himeno, and Y. Ohmori, “Mach–Zehnder interferometer and arrayed waveguide-grating integrated multi/demultiplexer with photosensitive wavelength tuning,” Electron. Lett., vol. 37 no. 6, pp. 376–377, 2001.
S.-H. Jeong and Y. Tanaka, “Silicon-wire optical demultiplexers based on multistage delayed Mach–Zehnder interferometers for higher production yield,” Appl. Opt., vol. 57, no. 22, pp. 6474–6480, 2018.
S.-H. Jeong and Y. Tanaka, “Silicon-wire delayed interferometric wavelength-division multiplexing filters operating in the broadband spectral range,” J. Opt. Soc. Am. (B), vol. 35, no. 8, pp. 1871–1877, 2018.
S.-H. Jeong, D. Shimura, T. Simoyama, T. Horikawa, Y. Tanaka, and K. Morito, “Si-nanowire-based multistage delayed Mach–Zehnder interferometer optical MUX/DeMUX fabricated by an ArF-immersion lithography process on a 300 mm SOI wafer,” Opt. Lett., vol. 39, no. 13, pp. 3702–3705, 2014.
R. -J. Essiambre and R. W. Tkach, “Capacity trends and limit of optical communication networks,” Proc. IEEE, vol. 100, no. 5, pp. 1035–1055, 2012.
F. Horst, W. M. J. Green, S. Assefa, S. M. Shank, Y. A. Vlasov, and B. J. Offrein, “Cascaded Mach–Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing,” Opt. Express, vol. 21, no. 10, pp. 11652–11658, 2013.
Y. A. Vlasov, “Silicon CMOS-integrated nano-photonics for computer and data communications beyond 100G,” IEEE Commun. Mag., vol. 50, no. 2, pp. S67–S72, 2012.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
S. Chen, X. Fu, J. Wang, Y. Shi, S. He, and D. Dai, “Compact dense wavelength-division (de)multiplexer utilizing a bidirectional arrayed-waveguide grating integrated with a Mach–Zehnder interferometer,” IEEE J. Lightwave Techhnol., vol. 33, no. 11, pp. 2279–2286, 2015.
J. Wang, “Low-loss and low-crosstalk 8 × 8 silicon nanowire AWG routers fabricated with CMOS technology,” Opt. Express, vol. 22 no. 8, pp. 9395–9403, 2014.
H. -C. Lu and W. -S. Wang, “Cyclic arrayed waveguide grating devices with flat-top passband and uniform spectral response,” IEEE Photon. Technol. Lett., vol. 20, no. 1, pp. 3–5, 2008.
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, “Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer,” Opt. Express, vol. 20, no. 16, pp. 18313–18318, 2012.
Y. Onawa, H. Okayama, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “'Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter,” Electron Lett., vol. 55, no. 8, pp. 475–476, 2019.
H. Okayama, Y. Onawa, D. Shimura, H. Takahashi, H. Yaegashi, and H. Sasaki, “Low loss 100 GHz spacing arrayed-waveguide grating using minimal terrace at slab-array interface,” Electron Lett., vol. 52, no. 18, pp. 1545–1546, 2016.
X. Zhao, V. Vusirikala, B. Koley, V. Kamalov, and T. Hofmeister, “The prospect of inter-data-center optical networks,” IEEE Commun. Magz., pp. 32–38, 2013.
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