InP-based compact transversal filter for monolithically integrated light source array

Yuta Ueda, Takeshi Fujisawa, Kiyoto Takahata, Masaki Kohtoku, Hiroyuki Ishii

Research output: Contribution to journalArticle

9 Citations (Scopus)


We developed an InP-based 4x1 transversal filter (TF) with multi-mode interference couplers (MMIs) as a compact wavelength multiplexer (MUX) 1700 μm x 400 μm in size. Furthermore, we converted the MMI-based TF to a reflection type to obtain an ultra-compact MUX of only 900 μm x 50 μm. These MUXs are made with a simple fabrication process and show a satisfactory wavelength filtering operation as MUXs of monolithically integrated light source arrays, for example, for 100G bit Ethernet.

Original languageEnglish
Pages (from-to)7844-7851
Number of pages8
JournalOptics Express
Issue number7
Publication statusPublished - 2014 Jan 1


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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