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Fiber-optic multifunction devices using a single GRIN-rod lens for WDM transmission systems.

T Tanaka¹, S Kishi, T Tsutsumi

¹Matsushita Electric Industrial Company, Ltd., Visual Information Systems Development Center, Moriguchi, Osaka, 570, Japan.

|April 17, 2010

Summary

A new passive fiber-optic multiplexer-demultiplexer was developed for WDM systems. This compact device offers low loss and high isolation, enabling multifunctional optical components.

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Area of Science:

Optoelectronics
Optical Communications
Photonics

Background:

Fiber-optic devices are crucial for modern communication systems.
Wavelength Division Multiplexing (WDM) enhances fiber optic capacity.
Existing multiplexer-demultiplexer designs can be bulky or complex.

Purpose of the Study:

To develop a novel, compact multiplexer-demultiplexer for WDM transmission.
To achieve low-loss and high-isolation characteristics in a passive device.
To demonstrate the potential for constructing multifunctional optical devices.

Main Methods:

The multiplexer-demultiplexer was designed using a single GRIN-rod lens.
Interference filters were directly attached to the fiber and lens ends.

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Performance was evaluated using a pair of two-channel devices with LEDs.

Main Results:

The developed device exhibits low total loss (<3.0 dB).
High isolation was achieved (less than -30 dB crosstalk).
The design allows for direct filter attachment, reducing size and improving performance.

Conclusions:

A compact and efficient passive fiber-optic multiplexer-demultiplexer has been successfully developed.
The device's design facilitates integration into WDM systems.
This approach enables the creation of versatile optical components, including those with integrated optical switches.