Programmable coupler ladder based on lithium niobate Y-junction reflector

Jianxiao Chen, Tetsuya Kawanishi, Kaoru Higuma, Satoshi Shinada, William S.C. Chang, Masayuki Izutsu, Paul K.L. Yu

Research output: Contribution to journalArticle

Abstract

This paper presents a proposal for a novel integrated tunable coupler device called programmable coupler ladder, based on Titanium diffused lithium niobate waveguide and Y-junction reflector. Unlike the traditional serial to parallel converter, the coupler ladder sorts the output bits in the time axis using a built-in delay waveguide. With a proper control signal it can perform signal processing at the bit level. It also can generate coherent multi-channel outputs with theoretically arbitrary amplitude and phase from continuous input light source. Its application in optical microwave beam forming is briefly described. The key component, built-in delay line based on Y-junction reflector, has been experimentally verified via a loop resonator structure, 1 dB loss is found for each Y-junction reflector, which enables a practical coupler ladder. The loop itself is also an important device for optical signal processing.

Original languageEnglish
Pages (from-to)379-383
Number of pages5
JournalIEICE Transactions on Electronics
VolumeE88-C
Issue number3
DOIs
Publication statusPublished - 2005 Jan 1
Externally publishedYes

Keywords

  • Coupler ladder
  • Lithium niobate
  • Loop resonator
  • Splitter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Programmable coupler ladder based on lithium niobate Y-junction reflector'. Together they form a unique fingerprint.

  • Cite this

    Chen, J., Kawanishi, T., Higuma, K., Shinada, S., Chang, W. S. C., Izutsu, M., & Yu, P. K. L. (2005). Programmable coupler ladder based on lithium niobate Y-junction reflector. IEICE Transactions on Electronics, E88-C(3), 379-383. https://doi.org/10.1093/ietele/e88-c.3.379