Optical interconnection using fiber-embedded boards and connection blocks fabricated by a micro-grooving technique for fiber insertion

Cho, Han Seo; Kang, Sunghwun; Cho, Mu Hee; Rho, Byung Sup; Park, Hyo-Hoon; Shin, Kyoung Up; Ha, Sang-Won; Rhee, Byoung-Ho; Kim, Dongsu; Jung, Sun Tea; Kim, Taeil

doi:10.1088/0960-1317/14/8/009

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…The bending losses were simulated and measured. The simulation program used in this study is based on ray tracing 11 which has successfully been used for coupling efficiency calculation of multi-mode optical interconnection systems. Fig.…”

Section: Figs 3(a) and (B)mentioning

confidence: 99%

“…5. U-grooves having 250 µm pitch were formed by a grooving technique 11,13 on the left and bottom sides of the polycarbonate upper body. The upper body has a rounded corner with a radius of 2 mm.…”

Section: Figs 3(a) and (B)mentioning

confidence: 99%

“…Also in the case of the micro-prisms, a difficulty in beam isolation between neighboring channels may be raised. In our previous works, [9][10][11][12] we proposed optical interconnection schemes using 45 o -ended fiber rods 9,10 and blocks 11,12 in waveguide-and fiber-embedded OPCBs. The schemes showed highly efficient coupling between the 45°-ended connectors and the OPCB.…”

Section: Introductionmentioning

confidence: 99%

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Passive optical components for chip-on-board type optical interconnection

Cho¹,

Cho²,

Rho³

et al. 2005

SPIE Proceedings

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Passive optical components for optical interconnection using hybrid optical printed-circuit boards (PCBs) where electrical and optical layers are integrated into one board has been studied. We present detailed fabrication processes and optical characteristics of optical PCBs and connectors for optical coupling between vertical and horizontal directions. Two kinds of optical PCBs, polymer-waveguide-embedded and silica-fiber-embedded PCBs, were prepared. For the polymer-waveguide-embedded PCB, the polymer waveguide was formed lithographically on a FR-4 board and its core has 100 µm width and 60 µm thickness. The waveguide-defined board was covered with another FR4 plate and then laminated at 185°C under the pressure of 35 kg/cm 2 . After lamination the transmission loss of the waveguide was -0.53 dB/cm. For the fiber-embedded PCB, fibers with 100 µm core diameter were inserted in grooves formed on a FR-4 board and they followed a similar lamination processes. The propagation loss of the fiber-embedded board at 850 nm was negligible in board scale. We also prepared 2 types of connectors for optical coupling between the surface mounted transmitter or receiver modules and the optical PCBs; 45 o -ended fiber block and 90°-bent fiber connector. The insertion losses of the 2 kinds of connectors were, respectively, -0.15 dB and -0.25 dB. The best combination between the optical PCBs and connectors in view of optical characteristics and packaging is fiber-embedded board and 90°-bent fiber connector. They show successfully optical link of 2.5 Gbps with a very low coupling losses of -4.4 dB and a low optical crosstalk of -53 dB.

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Section: Figs 3(a) and (B)mentioning

confidence: 99%

Section: Figs 3(a) and (B)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Passive optical components for chip-on-board type optical interconnection

Cho¹,

Cho²,

Rho³

et al. 2005

SPIE Proceedings

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“…The polymeric waveguide system uses the 450-ended mirror connection blocks and silica fiber layer system uses 900-bent connection blocks to make optical interconnection between transmitters(or receivers) and waveguides in OPCB [7]- [8]. For these OPCB systems, accurate alignment at the interfaces between light sources(or photo diodes) and connection blocks and connection blocks and wave-guiding media like polymeric waveguide and silica fiber layer is of great importance because it decides the signal transmission quality.…”

Section: Introductionmentioning

confidence: 99%

Ray Trace Analysis in Optical PCB Systems Using Micro-optic Connectors for 90? Deflection of Light Beams

Kim

Lim

Cho

et al. 2007

The 9th International Conference on Advanced Communication Technology

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Optical coupling efficiencies of distance and angular misalignment tolerances were investigated for a polymeric waveguide system and a silica fiber layer system through a ray trace simulation method. The polymeric waveguide system has 45°-ended mirror connectors and a silica fiber layer system has 90°-bent fiber connectors in an optical PCB. As misalignment tolerances have larger values, coupling efficiencies gradually decreased, which is more rapid at the second and third interfaces than the first interface of the optical transmission system. The lowest angular misalignment coupling efficiency within the test range is around 10 dB, which is larger loss than 5 dB in the case of distance misalignment. Optical 3 dB degradation distances of y-direction at the first interface are 320 pm and 390 pm for the polymeric waveguide system and fiber layer system respectively. Optical 3 dB degradation distances of other directions at three interfaces except for light propagation direction are within 50 pm.

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