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Compression-tuned single-frequency Bragg grating fiber laser.

G A Ball, W W Morey

|October 27, 2009

Summary

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Compressive stress tunes a fiber laser

Area of Science:

Optics and Photonics
Fiber Laser Technology

Background:

Fiber lasers offer tunable wavelength output.
Bragg gratings are key components for wavelength selection.
Mode hopping can limit tuning range and stability.

Purpose of the Study:

To demonstrate continuous wavelength tuning of a single-frequency Bragg grating fiber laser.
To achieve a wide tuning range without mode hopping.
To maintain stable, low-noise output power during tuning.

Main Methods:

Applying compressive stress to a Bragg grating fiber.
Utilizing a master-oscillator/power-amplifier (MOPA) configuration.
Implementing active noise reduction techniques.

Main Results:

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Achieved continuous wavelength tuning over a 32 nm range.
Successfully avoided mode hopping throughout the tuning range.
Maintained a constant, low-noise output power of 3 mW.

Conclusions:

Compressive stress is an effective method for wide-range, mode-hop-free tuning of fiber lasers.
The MOPA configuration and noise reduction ensure stable laser performance.
This technique enables versatile tunable fiber laser sources for various applications.