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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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Published on: February 28, 2016

Bistable magnetooptic switch for multimode optical fiber.

M Shirasaki, H Takamatsu, T Obokata

|April 15, 2010

Summary

This study introduces a novel nonmechanical optical switch for multimode optical fiber. This device offers polarization-independent operation and low insertion loss, ideal for optical communication systems.

Area of Science:

Optoelectronics
Photonics
Materials Science

Background:

Nonmechanical optical switches are crucial for advanced optical communication networks.
Existing switches often face limitations in speed, size, or polarization dependence.
Developing robust and efficient optical switching solutions remains an active research area.

Purpose of the Study:

To present a novel bistable nonmechanical optical switch for multimode optical fiber.
To characterize its performance at the 1.3-micrometer wavelength range.
To demonstrate its independence from the polarization state of incident light.

Main Methods:

The switch utilizes Faraday rotators made of yttrium-iron-garnet, semihard magnetic material electromagnets, crystal quartz halfwave plates, rutile polarizing prisms, and lenses.

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Switching is achieved using 3-V, 20-microsecond pulses with a maximum current of 500 mA.

The device is designed as a 2-input/2-output system.

Main Results:

The optical switch demonstrated bistable operation for multimode optical fiber.
Insertion losses were measured at 1.5 dB.
Cross talk was achieved at -32 dB.
Optical characteristics were independent of the incident light's polarization state.

Conclusions:

The developed nonmechanical optical switch is effective for multimode optical fiber applications.
Its polarization-independent nature and low insertion loss make it suitable for optical communication.
The device shows promise for future high-performance optical networking.