Tailorable and Broadband On-Chip Optical Power Splitter

An on-chip optical power splitter is a key component of photonic signal processing and quantum integrated circuits and requires compactness, wideband, low insertion loss, and variable splitting ratio. However, designing an on-chip splitter with both customizable splitting ratio and wavelength independence is a big challenge. Here, we propose a tailorable and broadband optical power splitter over 100 nm with low insertion loss less than 0.3%, as well as a compact footprint, based on 1×2 interleaved tapered waveguides. The proposed scheme can design the output power ratio of transverse electric modes, lithographically, and a selection equation of a power splitting ratio is extracted to obtain the desired power ratio. Our splitter scheme is close to an impeccable on-chip optical power splitter for classical and quantum integrated photonic circuits.

[1]  Toshihiko Baba,et al.  Low Loss Ultra-Small Branches in a Silicon Photonic Wire Waveguide , 2002 .

[2]  Yang Wang,et al.  Ultra-broadband and low-loss 3  dB optical power splitter based on adiabatic tapered silicon waveguides. , 2016, Optics letters.

[3]  H. Tang,et al.  Design and characterization of integrated components for SiN photonic quantum circuits. , 2016, Optics express.

[4]  Tao Chu,et al.  Optical directional coupler based on Si-wire waveguides , 2005, First IEEE International Conference on Group IV Photonics, 2004..

[5]  Fan Zhang,et al.  Broadband 2 × 2 adiabatic 3  dB coupler using silicon-on-insulator sub-wavelength grating waveguides. , 2016, Optics letters.

[6]  C. Roeloffzen,et al.  Compact and reconfigurable silicon nitride time-bin entanglement circuit , 2015, 1506.02758.

[7]  G. Lo,et al.  A compact and low loss Y-junction for submicron silicon waveguide. , 2013, Optics express.

[8]  Lukas Chrostowski,et al.  Ultra-broadband 2 × 2 adiabatic 3  dB coupler using subwavelength-grating-assisted silicon-on-insulator strip waveguides. , 2018, Optics letters.

[9]  Ray T. Chen,et al.  Recent advances in silicon-based passive and active optical interconnects. , 2015, Optics express.

[10]  Sanjeev Kumar Raghuwanshi,et al.  Propagation Study of Y-branch Having Inbuilt Optical Splitters and Combiner Using Beam Propagation Method , 2012 .

[11]  Jean-Marc Fedeli,et al.  Low Loss MMI Couplers for High Performance MZI Modulators , 2010, IEEE Photonics Technology Letters.

[12]  Zhenping Xing,et al.  Compact high-performance adiabatic 3-dB coupler enabled by subwavelength grating slot in the silicon-on-insulator platform. , 2018, Optics express.

[13]  Sailing He,et al.  Low-loss and broadband 2 × 2 silicon thermo-optic Mach-Zehnder switch with bent directional couplers. , 2016, Optics letters.

[14]  Qianfan Xu,et al.  Guiding and confining light in void nanostructure. , 2004, Optics letters.

[15]  M. Błahut,et al.  Multimode interference structures : new way of passive elements technology for photonics , 2001 .

[16]  T. Aalto,et al.  Adiabatic and Multimode Interference Couplers on Silicon-on-Insulator , 2006, IEEE Photonics Technology Letters.

[17]  S. Chu,et al.  Generation of multiphoton entangled quantum states by means of integrated frequency combs , 2016, Science.

[18]  Soon Thor Lim,et al.  Broadband Silicon-On-Insulator directional couplers using a combination of straight and curved waveguide sections , 2017, Scientific Reports.

[19]  Yu Yu,et al.  Integrated dual-mode 3 dB power coupler based on tapered directional coupler , 2016, Scientific Reports.

[20]  Roger Fabian W. Pease,et al.  Lithography and Other Patterning Techniques for Future Electronics , 2008, Proceedings of the IEEE.

[21]  Sunao Torii,et al.  On-Chip Optical Interconnect , 2009, Proceedings of the IEEE.

[22]  Daoxin Dai,et al.  Mode conversion in tapered submicron silicon ridge optical waveguides. , 2012, Optics express.

[23]  Nicolas A. F. Jaeger,et al.  Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers. , 2015, Optics express.

[24]  K. Jinguji,et al.  Wavelength characteristics of (2*2) optical channel-type directional couplers with symmetric or nonsymmetric coupling structures , 1992 .