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Updated: May 29, 2026
09:43
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
CWDM based HDMI interconnect incorporating passively aligned POF linked optical subassembly modules
Hak-Soon Lee1, Sang-Shin Lee, Yung-Sung Son
1Department of Electronic Engineering, Kwangwoon University 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701, South Korea.
Optics Express
|September 22, 2011
Summary
This study presents a cost-effective optical HDMI interconnect using passive alignment and plastic optical fibers. It successfully transmitted high-definition video signals at 2.5 Gb/s with a low bit error rate.
Area of Science:
- Optoelectronics
- Optical Communications
- Materials Science
Background:
- Development of high-speed optical interconnects for consumer electronics.
- Need for cost-effective manufacturing of optical modules.
- Integration of optical components for high-definition multimedia interface (HDMI) applications.
Purpose of the Study:
- To develop and evaluate a four-channel optical HDMI interconnect.
- To utilize a coarse wavelength division multiplexing (CWDM) scheme with VCSELs.
- To achieve high-quality video transmission using plastic optical fibers and passive alignment.
Main Methods:
- Construction of transmitter optical sub-assembly (TOSA) and receiver optical sub-assembly (ROSA) modules using plastic injection molding.
- Employing a fully passive alignment process for module integration.
- Establishing four optical links using graded-index plastic optical fibers (GI-POFs).
- Evaluating alignment tolerances, beam propagation, and data transmission capabilities.
Main Results:
- Achieved alignment tolerances of ~45 μm (transverse) and >200 μm (longitudinal) for ROSA, and ~20 μm (transverse) and >200 μm (longitudinal) for TOSA.
- Confirmed feasibility of optical coupling through beam profile monitoring.
- Successfully transmitted a 2.5 Gb/s digital signal with a bit error ratio below 10^-16.
- Demonstrated high-quality 1080p HDMI video transmission from a Blu-ray player to an LCD monitor.
Conclusions:
- The developed optical HDMI interconnect is feasible for high-quality video transmission.
- Cost-effective plastic injection molding and passive alignment enable efficient module production.
- The CWDM scheme without wavelength filters in the TOSA is effective for this application.
