A single-mode linear-cavity fiber laser that utilizes intracore Bragg reflectors for cavity feedback has been continuously tuned, without mode hopping, when both the gratings and enclosed fiber are stretched uniformly. Continuous tuning is achieved in a 1.54-microm erbium fiber laser since the change in the reflected wavelength from a Bragg reflector tracks the change in the cavity resonance wavelength.

Compressive stress has been used to continuously wavelength tune a single-frequency Bragg grating fiber laser over 32 nm without mode hopping. A master-oscillator/power-amplifier configuration and active noise reduction were implemented to maintain a constant, low-noise, 3-mW lasing power over the tuning range.

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