Article

Optical and Quantum Electronics

, Volume 35, Issue 8, pp 783-790

First online:

Design of flat-field arrayed waveguide grating with three stigmatic points

  • S. LuAffiliated withDepartment of Electronic Engineering, Optoelectronics Research Center, City University of Hong Kong Email author 
  • , W.H. WongAffiliated withDepartment of Electronic Engineering, Optoelectronics Research Center, City University of Hong Kong
  • , E.Y.B. PunAffiliated withDepartment of Electronic Engineering, Optoelectronics Research Center, City University of Hong Kong
  • , Y. YanAffiliated withDepartment of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University
  • , D. WangAffiliated withDepartment of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University
  • , D. YiAffiliated withDepartment of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University
  • , G. JinAffiliated withDepartment of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University

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Abstract

A new-type flat-field arrayed waveguide grating (AWG), with the focal signals of all wavelengths of operation focusing along a straight line, has been designed. The work bases on the aberration theory of AWG, in which the restraints imposed on the conventional Rowland-type AWG have been released. In the design of flat-field AWG, three stigmatic points restrain three dominant geometry parameters: geometry of star couplers, ports distribution of phased-array, and length increment between adjacent paths. An eight-channel 200-GHz spacing flat-field AWG has been designed and simulated. As stigmatic points introduced, the aberration of this device is much lower than that of the Rowland-type AWG.

aberration theory arrayed waveguide grating (AWG) flat-field stigmatic point