Narrow-band vertically stacked filters in InGaAlAs/InP at 1.5 μm

Sang Kook Han, Ramu V. Ramaswamy, Robert F. Tavlykaev

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A narrow-band wavelength filter in InGaAlAs/InP has been modeled, fabricated, and tested. A highly asymmetrical, vertically coupled directional coupler operating near the band-edge is formed by a narrow ridge and a wide strip-loaded waveguide. The results of numerical simulation, performed by employing the spectral index method, effective-index method, and a modified coupled-mode theory, are used to fabricate a filter structure with a prescribed filter response. Operation at a center wavelength around 1.5 μm with a bandwidth of 18 Å and transfer efficiency of ∼46-68% is achieved. Excellent agreement between the designed and measured bandwidth is demonstrated. A multichannel filter device based on an array of individual filters that is capable of extending the usable spectral range is analyzed.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalJournal of Lightwave Technology
Issue number1
Publication statusPublished - 1996 Jan

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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