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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 12 — Jun. 17, 2013
  • pp: 14202–14214

Bidirectional grating coupler based optical modulator for low-loss Integration and low-cost fiber packaging

Zanyun Zhang, Beiju Huang, Zan Zhang, Chuantong Cheng, and Hongda Chen  »View Author Affiliations


Optics Express, Vol. 21, Issue 12, pp. 14202-14214 (2013)
http://dx.doi.org/10.1364/OE.21.014202


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Abstract

We proposed and demonstrated a novel optical modulator based on a bidirectional grating coupler designed for perfectly vertical fiber coupling. The grating functions as the fiber coupler and 3-dB splitter. To observe the interference, an arm difference of 30μm is introduced. As a result of the high coupling efficiency and near perfect split ratio of the grating coupler, this device exhibits a low on-chip insertion loss of 5.4dB (coupling loss included) and high on-off extinction ratio more than 20dB. The modulation efficiency is estimated to be within 3-3.84V•cm. In order to investigate the fiber misalignment tolerance of this modulator, misalignment influence of the static characteristics is analyzed. 10Gb/s Data transmission experiments of this device are performed with different fiber launch positions. The energy efficiency is estimated to be 8.1pJ/bit.

© 2013 OSA

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.1360) Optical devices : Beam splitters
(250.5300) Optoelectronics : Photonic integrated circuits
(250.7360) Optoelectronics : Waveguide modulators

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 15, 2013
Revised Manuscript: May 27, 2013
Manuscript Accepted: May 27, 2013
Published: June 7, 2013

Citation
Zanyun Zhang, Beiju Huang, Zan Zhang, Chuantong Cheng, and Hongda Chen, "Bidirectional grating coupler based optical modulator for low-loss Integration and low-cost fiber packaging," Opt. Express 21, 14202-14214 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-12-14202


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