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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 19, Iss. 11 — Nov. 1, 2001
  • pp: 1726–

The Role of Photomask Resolution on the Performance of Arrayed-Waveguide Grating Devices

Chauhan D. Lee, Wei Chen, Qiang Wang, Yung-Jui Chen, Warren T. Beard, Dennis Stone, Robert F. Smith, Rod Mincher, and Ian R. Stewart

Journal of Lightwave Technology, Vol. 19, Issue 11, pp. 1726- (2001)


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Abstract

The crosstalk performance of an arrayed-waveguide grating (AWG) multiplexer or demultiplexer is primarily caused by random optical phase errors introduced in the arrayed waveguides. Because the layout of waveguides on a wafer is patterned via photomask through the photolithography process, the resolution of a photomask has a direct influence on the phase errors of an AWG. This paper presents a theoretical analysis on the phase error caused by photomask resolution and other basic design parameters. Both calculation and measurement results show that a high-resolution photomask (better than 25 nm) is a critical requirement to produce low-crosstalk (less than -30 dB) AWG demultiplexers. We also investigate the effect of nonideal power distribution in the arrayed waveguides because it contributes considerable phase errors when material impurity is not well controlled during wafer fabrication. Basic criteria of power profile truncation, number of grating waveguides, and material index variation are also summarized.

[IEEE ]

Citation
Chauhan D. Lee, Wei Chen, Qiang Wang, Yung-Jui Chen, Warren T. Beard, Dennis Stone, Robert F. Smith, Rod Mincher, and Ian R. Stewart, "The Role of Photomask Resolution on the Performance of Arrayed-Waveguide Grating Devices," J. Lightwave Technol. 19, 1726- (2001)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-19-11-1726

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