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Optical fiber power-splitter with selectable splitting ratio.

P Matthijsse, C M Blok

|April 20, 2010

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This study introduces an optical fiber power-splitter utilizing a thin phase grating. Feedback control allows for adjustable splitting ratios, demonstrating minimal wavelength dependency for practical applications.

Area of Science:

Photonics and Optical Engineering
Wave Optics and Diffraction

Background:

Traditional optical fiber power splitters often face limitations in tunability and efficiency.
Phase gratings offer a promising alternative for compact and efficient optical signal manipulation.

Purpose of the Study:

To develop and characterize a novel optical fiber power-splitter based on a thin phase grating.
To investigate the performance metrics including wavelength dependency, insertion loss, and splitting ratio control.

Main Methods:

Theoretical modeling of a thin phase grating for optical power splitting.
Experimental validation using a non-optimal biphase grating.
Implementation of an output signal feedback mechanism for ratio adjustment.

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Main Results:

Demonstrated a simple yet efficient phase grating power-splitter with low wavelength dependency.
Achieved selectable splitting ratios of 3, 5, 7, or 9 via double grating pass and feedback control.
Observed non-uniform power distribution for specific splitting ratios (5 and 7).

Conclusions:

The developed phase grating power-splitter offers a versatile and efficient solution for optical signal division.
The device's performance is robust against wavelength variations, broadening its application scope.
Feedback-controlled double-pass grating configuration enables tunable power splitting with high efficiency.