A Two-Mode (De)Multiplexer Based on Multimode Interferometer Coupler and Y-Junction on InP Substrate

A two-mode (de)multiplexer [(DE)MUX] based on a multimode interferometer coupler and a symmetric Y-junction coupler is proposed and demonstrated on an InP substrate. By introducing a phase shifter section with a thickness-detuned core layer, a miniature two-mode (DE)MUX with mode conversion of 100% is designed and demonstrated. Simulation shows that the total length of the device can be as small as 446 μm: much shorter than other mode (DE) MUX in InP materials. Within the entire C-band wavelength range, the calculated insertion loss of the device is less than 0.7 dB, and the crosstalk is below -24 dB. A mode (DE) MUX was fabricated in InP materials, and the mode conversion of the TE0 and TE1 modes were successfully demonstrated.

[1]  J. Leuthold,et al.  Multimode interference couplers for the conversion and combining of zero- and first-order modes , 1998 .

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

[3]  Chunlai Xue,et al.  Compact two-mode (de)multiplexer based on symmetric Y-junction and multimode interference waveguides. , 2014, Optics express.

[4]  Kunimasa Saitoh,et al.  A design method of a fiber-based mode multi/demultiplexer for mode-division multiplexing. , 2010, Optics express.

[5]  J Leuthold,et al.  Spatial mode filters realized with multimode interference couplers. , 1996, Optics letters.

[6]  Jing Xu,et al.  On-chip two-mode division multiplexing using tapered directional coupler-based mode multiplexer and demultiplexer. , 2013, Optics express.

[7]  Richard V. Penty,et al.  An introduction to InP-based generic integration technology , 2014 .

[8]  K. Saitoh,et al.  Design of a Compact Two-Mode Multi/Demultiplexer Consisting of Multimode Interference Waveguides and a Wavelength-Insensitive Phase Shifter for Mode-Division Multiplexing Transmission , 2012, Journal of Lightwave Technology.

[9]  P. Winzer,et al.  Capacity Limits of Optical Fiber Networks , 2010, Journal of Lightwave Technology.

[10]  S. Bigo,et al.  Mode-Division Multiplexing of 2 $\,\times\,$100 Gb/s Channels Using an LCOS-Based Spatial Modulator , 2012, Journal of Lightwave Technology.

[11]  T. Morioka.  New generation optical infrastructure technologies: “EXAT initiative” towards 2020 and beyond , 2009, 2009 14th OptoElectronics and Communications Conference.

[12]  S. Liang,et al.  Two-mode de/multiplexer based on multimode interference couplers with a tilted joint as phase shifter. , 2015, Optics letters.

[13]  Maxim Kuschnerov,et al.  Employing Prism-Based Three-Spot Mode Couplers for High Capacity MDM/WDM Transmission , 2013, IEEE Photonics Technology Letters.

[14]  N. Riesen,et al.  Ultra-Broadband Tapered Mode-Selective Couplers for Few-Mode Optical Fiber Networks , 2013 .

[15]  Jianyi Yang,et al.  Mode multi/demultiplexer based on cascaded asymmetric Y-junctions. , 2013, Optics express.

[16]  Slotted Hybrid III–V/Silicon Single-Mode Laser , 2013, IEEE Photonics Technology Letters.