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Integrated-optic wavelength multi- and demultiplexers using a chirped grating and an ion-exchanged waveguide
T Suhara1, J Viljanen, M Leppihalme
1Osaka University, Faculty of Engineering, Department of Electronics, Yamada-oka 2-1, Suita, Osaka 565, Japan.
Applied Optics
|April 17, 2010
Summary
New wavelength multiplexers and demultiplexers utilize chirped gratings and ion-exchanged waveguides. These devices offer high resolution and low loss, enabling efficient optical signal processing and potential for mass production.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Wavelength multiplexing/demultiplexing is crucial for optical communication systems.
- Existing devices often require complex optical setups and have limitations in performance or scalability.
Purpose of the Study:
- To present novel wavelength multiplexers and demultiplexers.
- To demonstrate a device integrating chirped gratings with ion-exchanged multimode waveguides.
- To highlight the performance advantages and fabrication feasibility.
Main Methods:
- Fabrication of ion-exchanged multimode waveguides using electric-field-assisted ion-exchange.
- Creation of chirped gratings via computer-controlled electron-beam writing.
- Integration of grating and waveguide components without collimating optics.
Main Results:
- The developed device achieves high resolution and a large channel count.
- Demonstrated low crosstalk and low insertion loss.
- Achieved low-loss coupling to multimode fiber.
- The device exhibits a compact, stable structure suitable for mass production.
Conclusions:
- The presented chirped grating and ion-exchanged waveguide device offers a high-performance, compact solution for wavelength multiplexing/demultiplexing.
- The fabrication techniques are suitable for economical mass production.
- The device eliminates the need for collimating and focusing components, simplifying optical systems.
