Open AccessPolarisation insensitive wavelength de‐multiplexer using arrayed waveguide grating and polarisation rotator/splitter
Author(s) -
Onawa Y.,
Okayama H.,
Shimura D.,
Takahashi H.,
Yaegashi H.,
Sasaki H.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.8106
Subject(s) - optics , multiplexer , waveguide , splitter , wavelength , transverse mode , grating , arrayed waveguide grating , transverse plane , physics , materials science , wavelength division multiplexing , multiplexing , telecommunications , computer science , laser , structural engineering , engineering
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.