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Bistable optical switching using electrochemically generated bubbles.

J L Jackel¹, J J Johnson, W J Tomlinson

¹Bell Communications Research, Red Bank, New Jersey 07701, USA.

|September 23, 2009

Summary

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We developed a new optical waveguide switch using bubble creation and destruction. This bistable device is independent of wavelength and polarization, ideal for large optical cross-connects.

Area of Science:

Optoelectronics
Materials Science

Background:

Optical cross-connects are essential for modern telecommunication networks.
Existing optical switches often face limitations in scalability, wavelength dependence, or polarization sensitivity.

Purpose of the Study:

To demonstrate a novel bistable optical waveguide switch.
To assess its suitability for large-dimension optical cross-connects.
To evaluate its performance characteristics, including loss, crosstalk, and operational independence.

Main Methods:

The switch utilizes the electrolytic creation and catalytic destruction of bubbles for optical switching.
A prototype was constructed using a specific combination of materials.
Performance metrics such as insertion loss, crosstalk, wavelength dependence, and polarization dependence were analyzed through calculations and experimental validation.

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Main Results:

The optical switch exhibits intrinsic bistability, negating the need for a holding voltage.
Switching is independent of both optical wavelength and polarization.
Calculations predict low insertion loss and crosstalk, crucial for scalability in large switching arrays.

Conclusions:

The demonstrated bistable optical waveguide switch offers a promising solution for large-scale optical switching applications.
Its wavelength and polarization independence, coupled with low loss and crosstalk, make it suitable for advanced optical cross-connects.
The intrinsic bistability simplifies addressing and reduces power requirements.