Variable Optical Delay Line Using Discrete Harmonic Oscillation in Waveguide Lattices

Tenghao Li, Qingming Chen, Yunfeng Xiao, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


This paper proposes a variable optical delay line based on the discrete harmonic oscillation in the waveguide lattice with a quadratic distribution of coupling coefficients. Theoretical analysis and numerical simulation have shown that the device design can achieve a time delay of up to 10 ns, with the resolution of 0.5 ns, and the 3-dB bandwidth over the whole C-band. It allows a data packet of up to 17 bits at the rate of 100 Gb/s. In this design, the propagation path is folded by up to five times (or ten times for the one-port design). Compared with the conventional fiber-delay-line buffer, this design has a small footprint (about 10 mm × 0.5 mm). A group of them can be paralleled and cascaded within a small area (e.g., 20 copies into 1 cm2) as enabled by the microfabrication. With further optimization, this design has a potential for interconnecting and signal processing applications in optical communications and computing.
Original languageEnglish
Article number7273744
Pages (from-to)5095-5102
Number of pages8
JournalJournal of Lightwave Technology
Issue number24
Publication statusPublished - 15 Dec 2015


  • Optical buffers
  • optical computing
  • optical delay lines
  • optical planar waveguide components
  • optical propagation in anisotropic media

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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