A mode-locked 1.91 μm fiber laser based on interaction between graphene oxide and evanescent field
- A mode-locked 1.91 μm fiber laser based on interaction between graphene oxide and evanescent field
- 정민완; 구준회; 풀락; 송용원; 이주한
- 2 um laser; graphene oxide; evanescent field interaction; mode-locking; fiber laser
- Issue Date
- Applied Physics Express
- VOL 5, NO 11, 112702-1-112702-3
- The use of a graphene oxide (GO)-deposited D-shaped fiber as a saturable absorber for mode locking of a thulium-doped fiber laser is experimentally demonstrated. By using the evanescent field interaction of an oscillating beam with GO, a passive mode locking operation at a wavelength of ~1.91 µm is shown to be achievable from a ring cavity. Stable picosecond pulses are readily obtained at a repetition rate of 15.9 MHz. This demonstration confirms that GO is a cost-effective saturable absorber applicable for ~2 µm ultrafast pulse generation.
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