J. Semicond. > Volume 39 > Issue 12 > Article Number: 124008

Design of a C-band polarization rotator-splitter based on a mode-evolution structure and an asymmetric directional coupler

Chen Yuan 1, 2, , Jincheng Dai 1, 2, , Hao Jia 1, 2, , Jianfeng Ding 1, 2, , Lei Zhang 1, 2, , Xin Fu 1, 2, and Lin Yang 1, 2, ,

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Abstract: A C-band polarization rotator-splitter based on a mode-evolution structure and an asymmetric directional coupler is proposed. The mode-evolution structure is designed in a bi-level taper through which the TM0 mode can evolve into the TE1 mode. Then the TE1 mode is coupled to the TE0 mode at the cross port using the asymmetric directional coupler. The input TE0 mode propagates along the waveguide without mode conversion and output at the through port. From the experimental results, the extinction ratio is lower than 30 dB and the excess loss is less than 1 dB for input TE0 mode at the whole C-band. For input TM0 mode, the ER and the EL are, respectively, lower than −10 and 1.5 dB.

Key words: silicon photonicspolarization rotator splittersintegrated optic devices

Abstract: A C-band polarization rotator-splitter based on a mode-evolution structure and an asymmetric directional coupler is proposed. The mode-evolution structure is designed in a bi-level taper through which the TM0 mode can evolve into the TE1 mode. Then the TE1 mode is coupled to the TE0 mode at the cross port using the asymmetric directional coupler. The input TE0 mode propagates along the waveguide without mode conversion and output at the through port. From the experimental results, the extinction ratio is lower than 30 dB and the excess loss is less than 1 dB for input TE0 mode at the whole C-band. For input TM0 mode, the ER and the EL are, respectively, lower than −10 and 1.5 dB.

Key words: silicon photonicspolarization rotator splittersintegrated optic devices



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Lu Z, Wang Y, Zhang F, et al. Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers. Opt Express, 2015, 23(23): 29413

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Chen D, Xiao X, Wang L, et al. Broadband, fabrication-tolerant polarization beam splitters based on a tapered directional coupler. IEEE Photonics Technol Lett, 2016, 28(19): 2074

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Dai D, Wang Z, Bowers J E. Ultrashort broadband polarization beam splitter based on an asymmetrical directional coupler. Opt Lett, 2011, 36(13): 2590

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Hong J M, Ryu H H, Park S R, et al. Design and fabrication of a significantly shortened multimode interference coupler for polarization splitter application. IEEE Photonics Technol Lett, 2003, 15(1): 72

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Huang Y, Tu Z, Yi H, et al. High extinction ratio polarization beam splitter with multimode interference coupler on SOI. Opt Commun, 2013, 307: 46

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Liang T K, Tsang H K. Integrated polarization beam splitter in high index contrast silicon-on-insulator waveguides. IEEE Photonics Technol Lett, 2005, 17(2): 393

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Dai D, Wang Z, Peters J, et al. Compact polarization beam splitter using an asymmetrical Mach–Zehnder interferometer based on silicon-on-insulator waveguides. IEEE Photon Technol Lett, 2012, 24(8): 673

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Yun H, Chen Z, Wang Y, et al. Polarization-rotating, Bragg-grating filters on silicon-on-insulator strip waveguides using asymmetric periodic corner corrugations. Opt Lett, 2015, 40(23): 5578

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Zhang J, Liow T Y, Yu M, et al. Silicon waveguide based TE mode converter. Opt Express, 2010, 18(24): 25264

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Ding Y, Liu L, Peucheret C, et al. Fabrication tolerant polarization splitter and rotator based on a tapered directional coupler. Opt Express, 2012, 20(18): 20021

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Xiong Y, Xu D X, Schmid J H, et al. Fabrication tolerant and broadband polarization splitter and rotator based on a taper-etched directional coupler. Opt Express, 2014, 22(14): 17458

[14]

Guan H, Novack A, Streshinsky M, et al. CMOS-compatible highly efficient polarization splitter and rotator based on a double-etched directional coupler. Opt Express, 2014, 22(3): 2489

[15]

Dai D, Wu H. Realization of a compact polarization splitter-rotator on silicon. Opt Lett, 2016, 41(10): 2346

[16]

Zhang Y, He Y, Jiang X, et al. Ultra-compact and highly efficient silicon polarization splitter and rotator. APL Photonics, 2016, 1(9): 091304

[17]

Wang Y, Ma M, Yun H, et al. Ultra-compact sub-wavelength grating polarization splitter-rotator for silicon-on-insulator platform. IEEE Photonics J, 2016, 8(6): 1

[18]

Xu Y, Xiao J. Design of a compact and integrated TM-rotated/TE-through polarization beam splitter for silicon-based slot waveguides. Appl Opt, 2016, 55(3): 611

[19]

Xu H, Shi Y. Ultra-broadband silicon polarization splitter-rotator based on the multi-mode waveguide. Opt Express, 2017, 25(15): 18485

[20]

Chen W, Wang P, Yang J. Mode multi/demultiplexer based on cascaded asymmetric Y-junctions. Opt Express, 2013, 21(21): 25113

[21]

Driscoll J B, Grote R R, Souhan B, et al. Asymmetric Y junctions in silicon waveguides for on-chip mode-division multiplexing. Opt Lett, 2013, 38(11): 1854

[22]

Wang J, Qi M, Xuan Y, et al. Proposal for fabrication-tolerant SOI polarization splitter-rotator based on cascaded MMI couplers and an assisted bi-level taper. Opt Express, 2014, 22(23): 27869

[23]

Dai D, Tang Y, Bowers J E. Mode conversion in tapered submicron silicon ridge optical waveguides. Opt Express, 2012, 20(12): 13425

[24]

Uematsu T, Ishizaka Y, Kawaguchi Y, et al. Design of a compact two-mode multi/demultiplexer consisting of multimode interference waveguides and a wavelength-insensitive phase shifter for mode-division multiplexing transmission. J Lightwave Technol, 2012, 30(15): 2421

[25]

Ding Y, Xu J, Da Ros F, et al. On-chip two-mode division multiplexing using tapered directional coupler-based mode multiplexer and demultiplexer. Opt Express, 2013, 21(8): 10376

[26]

Chen S, Wu H, Dai D. High extinction-ratio compact polarisation beam splitter on silicon. Electron Lett, 2016, 52(12): 1043

[1]

Vivien L, Laval S, Dumont B, et al. Polarization-independent single-mode rib waveguides on silicon-on-insulator for telecommunication wavelengths. Opt Commun, 2002, 210(1/2): 43

[2]

Milošević M M, Matavulj P S, Timotijević B D, et al. Design rules for single-mode and polarization-independent silicon-on-insulator rib waveguides using stress engineering. J Lightwave Technol, 2008, 26(13): 1840

[3]

Lu Z, Wang Y, Zhang F, et al. Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers. Opt Express, 2015, 23(23): 29413

[4]

Chen D, Xiao X, Wang L, et al. Broadband, fabrication-tolerant polarization beam splitters based on a tapered directional coupler. IEEE Photonics Technol Lett, 2016, 28(19): 2074

[5]

Dai D, Wang Z, Bowers J E. Ultrashort broadband polarization beam splitter based on an asymmetrical directional coupler. Opt Lett, 2011, 36(13): 2590

[6]

Hong J M, Ryu H H, Park S R, et al. Design and fabrication of a significantly shortened multimode interference coupler for polarization splitter application. IEEE Photonics Technol Lett, 2003, 15(1): 72

[7]

Huang Y, Tu Z, Yi H, et al. High extinction ratio polarization beam splitter with multimode interference coupler on SOI. Opt Commun, 2013, 307: 46

[8]

Liang T K, Tsang H K. Integrated polarization beam splitter in high index contrast silicon-on-insulator waveguides. IEEE Photonics Technol Lett, 2005, 17(2): 393

[9]

Dai D, Wang Z, Peters J, et al. Compact polarization beam splitter using an asymmetrical Mach–Zehnder interferometer based on silicon-on-insulator waveguides. IEEE Photon Technol Lett, 2012, 24(8): 673

[10]

Yun H, Chen Z, Wang Y, et al. Polarization-rotating, Bragg-grating filters on silicon-on-insulator strip waveguides using asymmetric periodic corner corrugations. Opt Lett, 2015, 40(23): 5578

[11]

Zhang J, Liow T Y, Yu M, et al. Silicon waveguide based TE mode converter. Opt Express, 2010, 18(24): 25264

[12]

Ding Y, Liu L, Peucheret C, et al. Fabrication tolerant polarization splitter and rotator based on a tapered directional coupler. Opt Express, 2012, 20(18): 20021

[13]

Xiong Y, Xu D X, Schmid J H, et al. Fabrication tolerant and broadband polarization splitter and rotator based on a taper-etched directional coupler. Opt Express, 2014, 22(14): 17458

[14]

Guan H, Novack A, Streshinsky M, et al. CMOS-compatible highly efficient polarization splitter and rotator based on a double-etched directional coupler. Opt Express, 2014, 22(3): 2489

[15]

Dai D, Wu H. Realization of a compact polarization splitter-rotator on silicon. Opt Lett, 2016, 41(10): 2346

[16]

Zhang Y, He Y, Jiang X, et al. Ultra-compact and highly efficient silicon polarization splitter and rotator. APL Photonics, 2016, 1(9): 091304

[17]

Wang Y, Ma M, Yun H, et al. Ultra-compact sub-wavelength grating polarization splitter-rotator for silicon-on-insulator platform. IEEE Photonics J, 2016, 8(6): 1

[18]

Xu Y, Xiao J. Design of a compact and integrated TM-rotated/TE-through polarization beam splitter for silicon-based slot waveguides. Appl Opt, 2016, 55(3): 611

[19]

Xu H, Shi Y. Ultra-broadband silicon polarization splitter-rotator based on the multi-mode waveguide. Opt Express, 2017, 25(15): 18485

[20]

Chen W, Wang P, Yang J. Mode multi/demultiplexer based on cascaded asymmetric Y-junctions. Opt Express, 2013, 21(21): 25113

[21]

Driscoll J B, Grote R R, Souhan B, et al. Asymmetric Y junctions in silicon waveguides for on-chip mode-division multiplexing. Opt Lett, 2013, 38(11): 1854

[22]

Wang J, Qi M, Xuan Y, et al. Proposal for fabrication-tolerant SOI polarization splitter-rotator based on cascaded MMI couplers and an assisted bi-level taper. Opt Express, 2014, 22(23): 27869

[23]

Dai D, Tang Y, Bowers J E. Mode conversion in tapered submicron silicon ridge optical waveguides. Opt Express, 2012, 20(12): 13425

[24]

Uematsu T, Ishizaka Y, Kawaguchi Y, et al. Design of a compact two-mode multi/demultiplexer consisting of multimode interference waveguides and a wavelength-insensitive phase shifter for mode-division multiplexing transmission. J Lightwave Technol, 2012, 30(15): 2421

[25]

Ding Y, Xu J, Da Ros F, et al. On-chip two-mode division multiplexing using tapered directional coupler-based mode multiplexer and demultiplexer. Opt Express, 2013, 21(8): 10376

[26]

Chen S, Wu H, Dai D. High extinction-ratio compact polarisation beam splitter on silicon. Electron Lett, 2016, 52(12): 1043

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C Yuan, J C Dai, H Jia, J F Ding, L Zhang, X Fu, L Yang, Design of a C-band polarization rotator-splitter based on a mode-evolution structure and an asymmetric directional coupler[J]. J. Semicond., 2018, 39(12): 124008. doi: 10.1088/1674-4926/39/12/124008.

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Manuscript received: 18 April 2018 Manuscript revised: 11 May 2018 Online: Uncorrected proof: 05 July 2018 Accepted Manuscript: 24 July 2018 Corrected proof: 01 November 2018 Published: 13 December 2018

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