Polarization insensitive, low-loss, low-crosstalk wavelength multiplexer modules

A method for compensating polarization sensitivity of arrayed waveguide gratings (AWG's) based on silica-on-Si waveguide technology using stress release grooves and its realization are described. These stress release grooves compensate fabrication-induced waveguide birefringence without performance degradation. An advanced design for low-loss, low-channel imbalance, and low-crosstalk multiplexer is given and results of the realized modules are presented. The TE/TM passband shift could be reduced from 0.7 nm to below 0.05 nm. Insertion loss of the fully packaged wavelength multiplexer modules is <5 dB and adjacent channel crosstalk is as low as <-40 dB.

[1]  H. Melchior,et al.  Polarisation insensitive wavelength multiplexers using stress release grooves , 1998, 24th European Conference on Optical Communication. ECOC '98 (IEEE Cat. No.98TH8398).

[2]  H. Bissessur,et al.  Small-size, polarisation-independent phased-array demultiplexers on InP , 1995 .

[3]  Mark L. Stevens,et al.  A Wideband All-Optical WDM Network (Invited Paper) , 1996, IEEE J. Sel. Areas Commun..

[4]  Mk Meint Smit,et al.  PHASAR-based WDM-devices: Principles, design and applications , 1996 .

[5]  Y. Hibino,et al.  Polarization-insensitive arrayed-waveguide grating wavelength multiplexer on silicon. , 1992, Optics letters.

[6]  H. Melchior,et al.  Penalty-free polarisation compensation of SiO/sub 2//Si arrayed waveguide grating wavelength multiplexers using stress release grooves , 1998 .

[7]  Mk Meint Smit,et al.  Design and realization of polarization independent phased array wavelength demultiplexers using different array orders for TE and TM , 1996 .

[8]  W. Lukosz,et al.  Determination of thickness, refractive indices, optical anisotropy of, and stresses in SiO2 films on silicon wafers , 1995 .

[9]  Akio Sugita,et al.  Estimation of waveguide phase error in silica-based waveguides , 1997 .

[10]  C. Dragone.  An N*N optical multiplexer using a planar arrangement of two star couplers , 1991, IEEE Photonics Technology Letters.

[11]  Masao Kawachi,et al.  Laser trimming adjustment of waveguide birefringence in silica integrated-optic ring resonators , 1989 .

[12]  R. Adar,et al.  Polarization independent narrow band Bragg reflection gratings made with silica‐on‐silicon waveguides , 1992 .

[13]  Waveguide grating routers with greater channel uniformity , 1997 .

[14]  Mk Meint Smit.  Integrated Optics in Silicon-based Aluminum Oxide , 1991 .

[15]  Steven K. Korotky,et al.  Low-Loss Ti:LiNbO3 Waveguide Bends at λ = 1.3 μm , 1982, Topical Meeting on Integrated and Guided-Wave Optics.

[16]  Y. Ohmori,et al.  Polarisation-insensitive arrayed-waveguide grating multiplexer with SiO2-on-SiO2 structure , 1994 .

[17]  Kazumasa Takada,et al.  Measurement of phase error distributions in silica-based arrayed-waveguide grating multiplexers by using Fourier transform spectroscopy , 1994 .

[18]  Mitsuho Yasu,et al.  Birefringence control in high-silica single-mode channel waveguides on silicon , 1987 .