Wavelength and dispersion tunable ultrafast holmium doped fiber laser with dual color operation.
We present a versatile ultrafast holmium doped fiber laser with an intracavity Martinez compressor. The compressor enables continuous dispersion control, spectral filtering, and dual color operation of the laser. Mode locking is supported for net cavity dispersion values ranging from highly anomalous 1.42ps2) to net normal (0.3ps2) and wavelength tuning of the optical solitons is obtained in a 2021 2096 nm span. Dual color pulsed operation of the laser is reached by implementing a mechanical bandstop filter within the compressor. The repetition rate offset of the two emitted frequency combs can be tuned in a 3 8 kHz range by adjusting the net cavity dispersion, or by changing the beam block diameter. We show that a relatively simple fiber resonator integrated with a Martinez compressor can serve as a highly tunable laser source.
Optics letters