Phase-Noise Measurement of a Stabilized Single-Longitudinal-Mode Er3+-Doped-Fiber Laser

Abstract

Results of phase-noise measurements performed on a stabilized single-longitudinal mode Er/sup 3+/-doped fiber laser have been presented. Various operating wavelengths and incident powers lead to similar results. Phase noise could be resolved up to 50 kHz. Contribution to laser line broadening was found to be significant only at low frequencies. The obtained rms linewidths make this laser particularly suitable for long baseline interferometry. Combined with a drift better than 10 MHz per hour (measured with a beat-note experiment between two lasers), these results indicate that this fiber laser is a very stable, tunable source in the 1.55 mu m optical region. (3 References).