华体会官方网页版-华体会(中国):Low-loss silica-based 90 deg optical hybrid in c band based on 4 x 4 multimode interference coupler for coherent receiver
Author(s): Cui, PW (Cui, Pengwei); Ma, JC (Ma, Junchi); Wang, Y (Wang, Yue); Zhang, JS (Zhang, Jiashun); You, J (You, Jin); An, JM (An, Junming); Wu, YD (Wu, Yuanda)
Source: OPTICAL ENGINEERING?Volume: 62?Issue: 11??DOI: 10.1117/1.OE.62.11.115101??Published: NOV 2023?
Abstract: A silica-based 90 deg optical hybrid based on a 4 x 4 multimode interference coupler with a refractive index contrast of 0.36% is designed and fabricated for coherent receiver. The measured results of this device show that the common mode rejection ratios are better than 23 dB and excess loss including a coupling loss of -0.3 dB is less than -0.9 dB in C band (1530 to 1565 nm). The phase error is less than 4 deg. The designed low-cost 90 deg optical hybrid is promising for further improving the sensitivity of quadrature phase shift keying coherent receivers.
Accession Number: WOS:001171514000015
ISSN: 0091-3286
eISSN: 1560-2303
