| Abstract: | The wavelength-tunable and switchable narrow bandwidth mode-locking operation is demonstrated in an all fiber laser based on semiconductor-saturable absorber mirror(SESAM).Two narrow-band fiber Bragg gratings centered at 1029.9 nm and 1032 nm respectively with a polarization controller inserted between them are used to realize the wavelength switchable between 1029.9nm and 1032 nm.The laser delivers different pulse widths of 7.5ps for 1030 nm and 20 ps for 1032 nm.The maximum output power for both could reach ~6.5mW at single pulse operation.The output wavelength could be tuned to about 0.9nm intervals ranging from 1030.2nm to 1031.1 nm and from 1032.15 nm to 1033.7nm with the temperature change of the fiber Bragg grating,respectively. |
