Abstract
A controllable passive harmonic mode locking (HML) in an erbium-doped fiber laser with a soliton pulse shaping using a single-wall carbon nanotube has been experimentally demonstrated. By increasing the pump power and adjusting the in-cavity polarization controller, we reached the 51st-order harmonic (902 MHz) having the output power of 37 mW. We attribute the observed high-frequency HML to the electrostriction effect caused by periodic pulses and leading to excitation of the radial and torsional-radial acoustic modes in the transverse section of the laser. The exited acoustic modes play the role of the bandpass filter, which stabilizes the high-frequency HML regime.
| Original language | English |
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| Pages (from-to) | 5112-5115 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 44 |
| Issue number | 21 |
| Early online date | 17 Oct 2019 |
| DOIs | |
| Publication status | Published - 17 Oct 2019 |