Low-loss passive alignment of single-mode fibers in low-temperature cofired ceramics using CO2 laser fabricated U-grooves

K. M. Nowak, H. J. Baker, D. R. Hall, X. Liu, A. Bell

Research output: Contribution to journalArticle

Abstract

We report a step toward optoelectronic integration on low-temperature cofired ceramics substrates in the form of fiber alignment U-grooves. The precision of the CO2 laser machining of green state ceramic for this purpose is investigated. The groove-writing process with a speed of 1 mm/s was carried out in air at room temperature and ambient pressure. The process is to a large extent self-cleaning without any gas jet assist. By analysis of groove profiles after firing of a near-zero shrinkage green tape formulation, it is shown that the cutting accuracy is approximately 2 µm, which is at the fundamental limit set by the particle size (1-5 µm). We demonstrate low-loss butt coupling of <1 dB for single-mode fibers using the laser written U-grooves. The technique exhibits a potential for fabrication of low-cost fiber ribbon and fiber array connectors. © 2006 Optical Society of America.

Original languageEnglish
Pages (from-to)9168-9175
Number of pages8
JournalApplied Optics
Volume45
Issue number36
DOIs
Publication statusPublished - 20 Dec 2006

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grooves
alignment
ceramics
fibers
lasers
laser machining
gas jets
connectors
shrinkage
cleaning
ribbons
tapes
formulations
fabrication
air
room temperature
profiles

Cite this

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abstract = "We report a step toward optoelectronic integration on low-temperature cofired ceramics substrates in the form of fiber alignment U-grooves. The precision of the CO2 laser machining of green state ceramic for this purpose is investigated. The groove-writing process with a speed of 1 mm/s was carried out in air at room temperature and ambient pressure. The process is to a large extent self-cleaning without any gas jet assist. By analysis of groove profiles after firing of a near-zero shrinkage green tape formulation, it is shown that the cutting accuracy is approximately 2 µm, which is at the fundamental limit set by the particle size (1-5 µm). We demonstrate low-loss butt coupling of <1 dB for single-mode fibers using the laser written U-grooves. The technique exhibits a potential for fabrication of low-cost fiber ribbon and fiber array connectors. {\circledC} 2006 Optical Society of America.",
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Low-loss passive alignment of single-mode fibers in low-temperature cofired ceramics using CO2 laser fabricated U-grooves. / Nowak, K. M.; Baker, H. J.; Hall, D. R.; Liu, X.; Bell, A.

In: Applied Optics, Vol. 45, No. 36, 20.12.2006, p. 9168-9175.

Research output: Contribution to journalArticle

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AU - Bell, A.

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