A 10-meter active optical cable utilizing POF with 4 × 10-Gb/s CMOS transceiver chipsets

Chaerin Hong, Seung Hoon Kim, Sangmo Cha, Sung Min Park

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This paper presents a 10-m active optical cable (AOC) utilizing a graded-index plastic optical fiber (POF) for HDMI applications, where 4-channel 10-Gb/s/ch transceiver chipsets were implemented in 0.13-μm CMOS process and integrated upon a FR4 PC-board within pluggable connectors. Passive optical alignment comprising optical devices, optical subassembly, and POF was precisely located within the tolerance range of +/−10 μm, leading to successful mass-production. The transmitter (Tx) includes a VCSEL driver exploiting equalization and feedforward pre-emphasis to support 10-Gb/s data modulation. Also, a novel input data detector is proposed to turn ON/OFF VCSEL diodes automatically for longer sustainability and lower power consumption. The receiver (Rx) employs a double-gain feedforward transimpedance amplifier followed by a selectable two-stage equalizer to choose either 6-Gb/s or 10-Gb/s operations, depending upon the specified HDMI applications. Also, a simple dc offset current cancellation and a novel monitor circuit are proposed for stable biasing and to keep tracking the average photocurrent of each photodiode. Measured results of Tx demonstrate 5.6-mA bias currents and 6.0-mA PP modulation currents, consuming 21.25 mA in maximum, whereas Rx provides 56.7-dB transimpedance gain, 6-GHz bandwidth, and −10.4-dBm optical sensitivity for 10 −12 BER with 21.2 mA current consumption. The 10-meter POF AOC demonstrates wide and clean eye-diagrams up to 10 Gb/s, successfully showing 8-Mpixel 60-fps video data stream.

Original languageEnglish
Article number8639008
JournalIEEE Photonics Journal
Volume11
Issue number2
DOIs
StatePublished - Apr 2019

Bibliographical note

Funding Information:
This work was supported in part by the Technological Innovation R&D Program (S2274357) funded by the Small and Medium Business Administration (SMBA, Korea) and in part by the National Research Foundation of Korea Grant through the Korean Government (MSIP) under Grant NRF-2014R1A2A2A01005686.

Funding Information:
Manuscript received January 4, 2019; revised February 2, 2019; accepted February 5, 2019. Date of publication February 11, 2019; date of current version February 22, 2019. This work was supported in part by the Technological Innovation R&D Program (S2274357) funded by the Small and Medium Business Administration (SMBA, Korea) and in part by the National Research Foundation of Korea Grant through the Korean Government (MSIP) under Grant NRF-2014R1A2A2A01005686. Corresponding author: Sung Min Park (e-mail: smpark@ewha.ac.kr).

Funding Information:
The EDA tool was supported by the IC Design Education Center, Korea.

Publisher Copyright:
© 2019 IEEE

Keywords

  • AOC
  • CMOS
  • HDMI
  • POF
  • VCF
  • VCSEL

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