Black phosphorus saturable absorber for ultrafast mode-locked pulse laser via evanescent field interaction
- Black phosphorus saturable absorber for ultrafast mode-locked pulse laser via evanescent field interaction
- 박기철; 이준수; 이영택; 최원국; 이주한; 송용원
- black phosphorus; saturable absorber; mode-locked laser; fiber lasers; ultrafast pulses
- Issue Date
- Annalen der Physik
- VOL 527, NO 11-12, 770-776
- Black phosphorus, or BP, has found a lot of applications in recent years including photonics. The most recent studies have shown that the material has an excellent optical nonlinearity useful in many areas, one of which is in saturable absorption for passive mode-locking. A direct interaction scheme for mode-locking, however, has a potential to optically cause permanent damage to the already delicate material. Evanescent field interaction scheme has already been proven to be a useful method to prevent such danger for other 2-dimensional nanomaterials. In this report, we have utilized the evanescent field interaction to demonstrate that the optical nonlinear characteristics of
BP is sufficiently strong to use in such an indirect interaction method. The successful demonstration of the passive mode-locking operation has generated pulses with the pulse duration, repetition rate, and time bandwidth product of 2.18 ps, 15.59 MHz, and 0.336, respectively.
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