Wavelength‐switchable fiber laser

Wavelength switching of erbium-doped fiber laser by using Mach–Zehnder interferometer and cavity loss control

“…A fiber laser employing an intracavity fiber Fabry-Pérot filter shows wide-band tunability in continuous mode operation [3][4][5]. A tunable laser can also be obtained by employing a self-injected/seeded Fabry-Pérot laser diode in the laser cavity [6,7], by using two cascaded unbalanced Mach-Zehnder interferometers as an intracavity filter [8], by controlling the pump power for erbium-doped fiber [9], by combining a long period grating and a polarization element to control polarizer-dependent loss [10,11], or through cavity loss control via fiber bending in the fiber laser loop [12][13][14],…”