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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 36 — Dec. 20, 2012
  • pp: 8587–8593

Si3N4 waveguide-based parallel optical interconnect incorporating an interface comprising arrayed grating couplers combined with fiber arrays

Vivek Raj Shrestha, Hak-Soon Lee, and Sang-Shin Lee  »View Author Affiliations


Applied Optics, Vol. 51, Issue 36, pp. 8587-8593 (2012)
http://dx.doi.org/10.1364/AO.51.008587


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Abstract

A high-speed parallel optical interconnect (POI) incorporating silicon nitride (Si3N4) waveguides was realized that takes advantage of an eight-channel input/output interface based on grating couplers (GCs) in alignment with fiber arrays. For each of the channels, a straight waveguide in the middle is linked to a GC via a taper, which is addressed by a single-mode fiber (SMF) at the input and a multimode fiber at the output. To verify the feasibility of the interconnect, the alignment tolerance has been explored in terms of the position and angle of incidence of the SMF with respect to the GC. This has been conducted by probing into the optical throughput of the proposed POI, which is determined by different sources of loss associated with the proposed Si3N4 waveguide device. For a typical GC, the measured coupling loss was 5.2 dB at the center wavelength of 1590 nm, when addressed by a SMF. For a 1 dB loss penalty, the positional tolerance of the fiber was discovered to about ±3μm and 45 μm along the lateral direction and the direction inclined at 16 deg normal to the device, respectively. The corresponding angular tolerance was ±1deg. We ultimately confirmed that 8×10Gbps high-speed digital signals were efficiently delivered through the proposed POI.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(130.0130) Integrated optics : Integrated optics
(200.4650) Optics in computing : Optical interconnects
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Optical Devices

History
Original Manuscript: August 22, 2012
Revised Manuscript: November 19, 2012
Manuscript Accepted: November 19, 2012
Published: December 14, 2012

Citation
Vivek Raj Shrestha, Hak-Soon Lee, and Sang-Shin Lee, "Si3N4 waveguide-based parallel optical interconnect incorporating an interface comprising arrayed grating couplers combined with fiber arrays," Appl. Opt. 51, 8587-8593 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-36-8587

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