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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4301–4309

Ribbon plastic optical fiber linked optical transmitter and receiver modules featuring a high alignment tolerance

Hak-Soon Lee, Jun-Young Park, Sang-Mo Cha, Sang-Shin Lee, Gyo-Sun Hwang, and Yung-Sung Son  »View Author Affiliations


Optics Express, Vol. 19, Issue 5, pp. 4301-4309 (2011)
http://dx.doi.org/10.1364/OE.19.004301


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Abstract

Ribbon plastic optical fiber (POF) linked four-channel optical transmitter (Tx) and receiver (Rx) modules have been proposed and realized featuring an excellent alignment tolerance. The two modules share a common configuration involving an optical sub-assembly (OSA) with vertical cavity surface emitting lasers (VCSELs)/photodetectors (PDs), and their driver ICs, which are integrated onto a single printed circuit board (PCB) substrate. The OSA includes an alignment structure, a beam router and a fiber guide, which were produced by using plastic injection molding. We have accomplished a fully passive alignment between the VCSELs/PDs and the ribbon POF by taking advantage of the alignment structure that serves as a reference during the alignment of the constituent parts of the OSA. The electrical link, which largely determines the operation speed, has been remarkably shortened, due to a direct wire-bonding between the VCSELs/PDs and the driver circuits. The light sources and the detectors can be individually positioned, thereby overcoming the pitch limitations of the ribbon POF, which is made up of perfluorinated graded-index (GI) POF with a 62.5 μm core diameter. The overall alignment tolerance was first assessed by observing the optical coupling efficiency in terms of VCSEL/PD misalignment. The horizontal and vertical 3-dB alignment tolerances were about 20 μm and 150 μm for the Tx and 50 μm and over 200 μm for the Rx, respectively. The VCSEL-to-POF coupling loss for the Tx and the POF-to-PD loss for the Rx were 3.25 dB and 1.35 dB at a wavelength of 850 nm, respectively. Subsequently, a high-speed signal at 3.2 Gb/s was satisfactorily delivered via the Tx and Rx modules over a temperature range of −30 to 70°C with no significant errors; the channel crosstalk was below −30 dB. Finally, the performance of the prepared modules was verified by transmitting a 1080p HDMI video supplied by a Bluelay player to an LCD TV.

© 2011 OSA

OCIS Codes
(200.4650) Optics in computing : Optical interconnects
(220.1140) Optical design and fabrication : Alignment
(230.0230) Optical devices : Optical devices
(080.2205) Geometric optics : Fabrication, injection molding
(140.7260) Lasers and laser optics : Vertical cavity surface emitting lasers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 10, 2010
Revised Manuscript: February 10, 2011
Manuscript Accepted: February 14, 2011
Published: February 18, 2011

Citation
Hak-Soon Lee, Jun-Young Park, Sang-Mo Cha, Sang-Shin Lee, Gyo-Sun Hwang, and Yung-Sung Son, "Ribbon plastic optical fiber linked optical transmitter and receiver modules featuring a high alignment tolerance," Opt. Express 19, 4301-4309 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-5-4301


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