Ultra-compact, flat-top demultiplexer using anti-reflection contra-directional couplers for CWDM networks on silicon.

Wavelength-division-multiplexing (WDM) networks with wide channel grids and bandwidths are promising for low-cost, low-power optical interconnects. Wide-bandwidth, single-band (i.e., no free-spectral range) add-drop filters have been developed on silicon using anti-reflection contra-directional couplers with out-of-phase Bragg gratings. Using such filter components, we demonstrate a 4-channel, coarse-WDM demultiplexer with flat passbands of up to 13 nm and an ultra-compact size of 1.2 × 10(-3) mm(2).

[1]  Siegfried Janz,et al.  Demonstration of a curved sidewall grating demultiplexer on silicon. , 2012, Optics express.

[2]  G. Roelkens,et al.  Silicon-on-Insulator CWDM Power Monitor/Receiver With Integrated Thin-Film InGaAs Photodetectors , 2009, IEEE Photonics Technology Letters.

[3]  H F Taylor,et al.  Contradirectional frequency-selective couplers for guided-wave optics. , 1980, Applied optics.

[4]  W Zhang,et al.  Contradirectional couplers in silicon-on-insulator rib waveguides. , 2011, Optics letters.

[5]  Yurii A. Vlasov,et al.  Silicon CMOS-integrated nano-photonics for computer and data communications beyond 100G , 2012, IEEE Communications Magazine.

[6]  Wei Shi,et al.  Silicon photonic grating-assisted, contra-directional couplers. , 2013, Optics express.

[7]  Michael Hochberg,et al.  Towards fabless silicon photonics , 2010 .

[8]  Guomin Jiang,et al.  FSR-free add-drop filter based on silicon grating-assisted contradirectional couplers. , 2013, Optics letters.

[9]  Wei Shi,et al.  Single-band add-drop filters using anti-reflection, contra-directional couplers , 2012, The 9th International Conference on Group IV Photonics (GFP).

[10]  Dazeng Feng,et al.  Fabrication Insensitive Echelle Grating in Silicon-on-Insulator Platform , 2011, IEEE Photonics Technology Letters.

[11]  M. Watts,et al.  Silicon photonics manufacturing. , 2010, Optics express.

[12]  Lawrence L. Buhl,et al.  Eight-Channel SiO $_2$ /Si $_3$ N $_4$ /Si/Ge CWDM Receiver , 2011 .

[13]  Nicolas A. F. Jaeger,et al.  Grating-coupled silicon microring resonators , 2012 .

[14]  Wei Shi,et al.  Design and characterization of microring reflectors with a waveguide crossing. , 2010, Optics letters.

[15]  I. Shubin,et al.  Wide bandwidth, low loss 1 by 4 wavelength division multiplexer on silicon for optical interconnects , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.