Abstract
By inserting a birefringence filter with FSR = 100 GHz inside a hybrid mode-locked Er-doped fibre laser, we successfully generate ps to sub-ps optical burst pulses with the intra-burst pulse rate up to 400 GHz. Multiplication of the intra-burst pulse rate is attributed to a new effect analogous to rational harmonic mode-locking, which occurs due to the relative alignment of the cavity harmonic frequencies, the external phase modulation induced frequencies, and the filter-selected frequencies.
Original language | English |
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Article number | 025102 |
Journal | Laser Physics Letters |
Volume | 14 |
Issue number | 2 |
DOIs | |
State | Published - 1 Feb 2017 |
Keywords
- fiber lasers
- mode-locked laser
- ultrafast laser