access icon free Polarisation insensitive wavelength de-multiplexer using arrayed waveguide grating and polarisation rotator/splitter

The authors report the polarisation insensitive operation of an arrayed waveguide grating using a polarisation rotator/splitter (PRS) waveguide device which attains identical wavelength characteristics and optical losses for both transverse electric (TE) and transverse magnetic (TM) polarisations. The proposed PRS device is composed of a rib structure waveguide and an asymmetrical directional coupler (ADC). The rib waveguide converts TM fundamental mode to TE first-order mode. The ADC splits TE first-order mode into the TE fundamental mode propagating in the sub-adjacent waveguide. Experimental results confirm that the proposed device operates independently of light polarisations; channel isolation is nearly 20 dB, and no transmission wavelength shift or polarisation dependent loss are observed between TE and TM polarisations.

Inspec keywords: arrayed waveguide gratings; integrated optics; optical directional couplers; optical beam splitters; optical design techniques; light polarisation; rib waveguides; optical losses; optical waveguides; optical rotation; optical communication equipment

Other keywords: first-order mode; polarisation insensitive wavelength de-multiplexer; polarisation rotator/splitter waveguide device; identical wavelength characteristics; sub-adjacent waveguide; transmission wavelength shift; asymmetrical directional coupler; rib structure waveguide; transverse magnetic polarisations; transverse electric polarisations; TE TM polarisations; arrayed waveguide grating; light polarisations; channel isolation

Subjects: Integrated optics; Multiplexing and switching in optical communication; Optical beam splitters; Optical communication devices, equipment and systems; Optical waveguides; Optical polarization; Integrated optics; Gratings, echelles; Optical waveguides and couplers; Optical communication equipment; Optical system design

References

    1. 1)
      • 4. Okayama, H., Onawa, Y., Miyamura, S., et al: ‘Design of polarization independent Si waveguide Bragg grating’, Tech. Digest Spring Conv. Jpn. Soc. Appl. Phys., Tokyo, Japan, March 2012, 18a-GP4-15.
    2. 2)
    3. 3)
      • 7. Chen, L., Doerr, C.R., Chen, Y.: ‘Polarization-diversified DWDM receiver on silicon free of polarization-dependent wavelength shift’, OFC/NF OEC Technical Digest, Los Angeles, CA, USA, March 2012, OW3G.7.
    4. 4)
    5. 5)
    6. 6)
    7. 7)
    8. 8)
    9. 9)
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.8106
Loading

Related content

content/journals/10.1049/el.2018.8106
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading