Integrated Optical I/O Port Combiner

Case ID:

Researchers at the University of Arizona have designed a polarization splitter rotator (PSR) that enables use of a single optical port for input and output signals simultaneously. This allows the output ports to connect to a wider variety of components and frees up other I/O ports for additional functions, or reduces the number of optical I/O ports required on a photonic integrated circuit.

Polarization splitter rotators (PSR) are used to separate the different polarization states of a beam of light entering the input port of the rotator, into different output ports on a photonic integrated circuit (PIC). These are generally used in one direction only, and lack efficiency.


  • Reduces the required number of optical I/O ports (or roughly doubles the number of available I/O ports)
  • Increases the utilization of the capacity available on the chip
  • Eliminates cross-talk and Bragg grating effect



  • Photonic integrated circuits (PICs)
  • Telecommunications

Status: issued U.S. patent #11,391,896


Patent Information:
Contact For More Information:
Richard Weite
Senior Licensing Manager, College of Optical Sciences
The University of Arizona
Lead Inventor(s):
Erfan Fard