Kim, Mijin KIM, JEONG JE Lee, Sang Bae Kim, Dal-Young Lee, Kwanil Lee, Wonsuk 2024-01-19T13:31:27Z 2024-01-19T13:31:27Z 2022-01-25 2021-11 2076-3417 https://pubs.kist.re.kr/handle/201004/116177 We demonstrate a passively mode-locked fiber laser using aqueous DNA solution as a saturable absorber (SA), with broadband pulse laser emission from 1 to 1.5 mu m. The mode-locked laser with erbium-doped fiber as the gain material has a center wavelength of 1563 nm, a 3 dB bandwidth of 3.9 nm, and a pulse width of 822 fs, whereas the laser with ytterbium-doped fiber as the gain material and an identical DNA aqueous SA has a center wavelength of 1037 nm, a 3 dB bandwidth of 5.04 nm, and a pulse width of 250 ps. The proposed laser, which is simple and cost effective to fabricate, exhibits excellent long-term stability as well as thermal stability during high-power operation. This mode-locked laser scheme with a liquid-phase DNA component has the potential to provide in-depth understanding of the optical nonlinearity and usefulness of DNA.</p> English MDPI Broadband Passively Mode-Locked Fiber Laser with DNA Aqueous Solution as Saturable Absorber Article 10.3390/app11219871 1 APPLIED SCIENCES-BASEL, v.11, no.21 APPLIED SCIENCES-BASEL 11 21 N scie scopus 000718436800001 2-s2.0-85117608915 Chemistry, Multidisciplinary Engineering, Multidisciplinary Materials Science, Multidisciplinary Physics, Applied Chemistry Engineering Materials Science Physics Article PULSE GENERATION LOCKING FEMTOSECOND NANOTUBE DNA ultrafast laser mode-locking saturable absorber liquid phase