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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Linearized electrooptic microwave downconversion using phase modulation and optical filtering.

Vincent R Pagán¹, Bryan M Haas, T E Murphy

¹Laboratory for Physical Sciences, College Park, MD 20740, USA. vrpagan@lps.umd.edu

|January 26, 2011

Summary

This summary is machine-generated.

We developed a novel electrooptic method to transmit microwave signals over optical fiber. This technique enables signal downconversion at the receiver, improving dynamic range through linearization.

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Area of Science:

Photonics
Microwave Engineering
Optical Communications

Background:

Traditional microwave signal transmission faces limitations in bandwidth and distance.
Optical fiber offers high bandwidth but requires complex signal conversion for microwave frequencies.

Purpose of the Study:

To present an electrooptic technique for efficient microwave signal transmission and downconversion over optical fiber.
To demonstrate a linearized system with improved dynamic range.

Main Methods:

Utilizing electrooptic phase modulation to encode microwave signals onto an optical carrier.
Employing re-modulation with a microwave local oscillator at the receiver.
Implementing optical carrier suppression using a notch filter for direct detection.

Main Results:

Successfully relayed and downconverted microwave signals to an intermediate frequency.
Achieved third-order linearization by controlling the local oscillator amplitude.
Demonstrated enhanced dynamic range due to system linearization.

Conclusions:

The proposed electrooptic technique provides a viable solution for long-haul microwave signal transmission.
The system's inherent linearization capability offers significant advantages for dynamic range improvement in optical microwave systems.