Add-drop filter with complex waveguide Bragg grating and multimode interferometer operating on arbitrarily spaced channels.

We present a silicon nitride/silicon dioxide add-drop filter operating on arbitrarily spaced channels using multimode interferometers (MMIs) and complex waveguide Bragg gratings (CWBGs). The add-drop filter shows a rejection ratio of >40  dB on all five channels, with a line width of 1.2 nm and an on-chip loss of <1  dB. By designing the CWBG with the Layer Peeling/Layer Adding algorithm, this MMI-CWBG add-drop filter platform has the capability for ultrabroadband add-drop operation on arbitrarily spaced channels.

[1]  M. Kuittinen,et al.  Add-drop filter based on TiO2 coated shifted Bragg grating. , 2016, Optics express.

[2]  E.C.M. Pennings,et al.  Optical multi-mode interference devices based on self-imaging: principles and applications , 1995 .

[3]  Michal Lipson,et al.  Breaking the Loss Limitation of On-chip High-confinement Resonators , 2016, 1609.08699.

[4]  J. Skaar,et al.  On the synthesis of fiber Bragg gratings by layer peeling , 2001 .

[5]  Mario Dagenais,et al.  Characterization of Low Loss Waveguides Using Bragg Gratings , 2018, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  Nicolas A. F. Jaeger,et al.  Silicon-on-Insulator Modulators Using a Quarter-Wave Phase-Shifted Bragg Grating , 2015, IEEE Photonics Technology Letters.

[7]  T A Birks,et al.  A complex multi-notch astronomical filter to suppress the bright infrared sky. , 2011, Nature communications.

[8]  L. Chrostowski,et al.  Narrow-Band Add-Drop Filter Based on Phase-Modulated Grating-Assisted Contra-Directional Couplers , 2018, Journal of Lightwave Technology.

[9]  Lawrence R. Chen,et al.  Low crosstalk Bragg grating/Mach-Zehnder interferometer optical add-drop multiplexer in silicon photonics. , 2015, Optics express.

[10]  Mario Dagenais,et al.  Arrayed waveguide grating spectrometers for astronomical applications: new results. , 2017, Optics express.

[11]  Mario Dagenais,et al.  Arbitrary on-chip optical filter using complex waveguide Bragg gratings , 2016 .

[12]  Larry R. Dalton,et al.  Polymer micro-ring filters and modulators , 2002 .

[13]  Göran Stemme,et al.  Low-power microelectromechanically tunable silicon photonic ring resonator add-drop filter. , 2015, Optics letters.

[14]  Silicon Photonic Four-Channel Optical Add-Drop Multiplexer Enabled by Subwavelength Grating Waveguides , 2018, IEEE Photonics Journal.

[15]  Corrado Sciancalepore,et al.  Low-Crosstalk Fabrication-Insensitive Echelle Grating Demultiplexers on Silicon-on-Insulator , 2015, IEEE Photonics Technology Letters.

[16]  Michal Lipson,et al.  Ultra-low-loss on-chip resonators with sub-milliwatt parametric oscillation threshold , 2017 .

[17]  Jessica R. Zheng,et al.  GNOSIS: THE FIRST INSTRUMENT TO USE FIBER BRAGG GRATINGS FOR OH SUPPRESSION , 2012, 1212.1201.

[18]  Hui Yu,et al.  Broadband tunable filter based on the loop of multimode Bragg grating. , 2018, Optics express.

[19]  W. Shi,et al.  Subwavelength-grating contradirectional couplers for large stopband filters. , 2018, Optics letters.

[20]  Sophie LaRochelle,et al.  Complex apodized Bragg grating filters without circulators in silicon-on-insulator. , 2015, Optics express.

[21]  P. Dapkus,et al.  Microdisk tunable resonant filters and switches , 2002, IEEE Photonics Technology Letters.