Hybrid sol-gel materials for integration of optoelectronic components

M. Amir Fardad, Oleg V. Mishechkin, Mahmoud Fallahi

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


In this paper, we report on the integration of the Bragg filters with 1 × 8 multimode interference (MMI) power splitters on silicon substrate, and the demonstration of 1 × 8 external cavity distributed Bragg reflector (DBR) lasers. Hybrid organic-inorganic material is developed based on the sol-gel synthesis of an organically modified silicon alkoxide. The sol-gel material is spin coated on grated SiO2/Si wafers, and the designed components (splitters and filters) are UV imprinted and developed using solvent assisted photolithography. The Bragg reflectors show filtering up to 98% with a bandwidth of about 0.8 nm consistent with their theoretical prediction. Integrated reflectors and MMI splitters are then used as feedback resonators for DBR lasers. Single-mode lasing with sidemode suppressions of up to 40 dB and a linewidth of about 400 kHz is observed. At 1550- nm wavelength, the loss and power uniformity in the MMI splitters, designed on the basis of lowest loss, are, respectively, 0.13 dB and 0.03 dB poorer than their theoretical calculations.

Original languageEnglish (US)
Pages (from-to)84-91
Number of pages8
JournalJournal of Lightwave Technology
Issue number1
StatePublished - Jan 2001


  • Bragg filters
  • Distributed Bragg reflector (DBR) lasers
  • Hybrid integration
  • Multimode interference (MMI)
  • Sol-gel process
  • Splitters

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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