A 1.55micron semiconductor - optical-fiber ring laser.
01 January 1986
We propose and demonstrate the first semiconductor - optical- fiber ring laser. The laser uses an InGaAsP traveling wave optical amplifier as the gain medium and a 1-m length of highly birefringent fiber as the feedback loop. Output coupling is provided by a fiber directional coupler. The highly birefringent fiber is used as a wavelength selective intra-cavity element, enabling single-frequency oscillation with a narrow linewidth at a wavelength near 1.55micron.