All-fiber dual-wavelength Q-switched and mode-locked EDFL by SMF-THDF-SMF structure as a saturable absorber

Multiwavelength Q-switched pulse operation with gold nanoparticles as saturable absorber

“…In the designed laser cavity, the PI-ISO not only maintained unidirectional operation but also decreased the possibility of any Brillouin backscattering, which could potentially disturb the stability of pulsed operation. 27 The GNPs SA was introduced into the lasing cavity between the PI-ISO and a 10-dB optical coupler (OC, 1980-FBT-C). The 90% port of the optical coupler was spliced with the WDM to complete the ring cavity.…”

High Performance Tunable Dual-Wavelength Erbium-Doped Fiber Laser Implemented by Using Tapered Triple-Core Photonic Crystal Fiber

“…Dual-wavelength erbium-doped fiber laser (DW-EDFL) plays an important role in the fields of microwave generation [1], high-resolution spectroscopy [2], remote sensing [3], etc. due to their high side mode suppression ratio (SMSR), narrow line width, flexible structural design, and high robustness.…”

“…A series of experiments have been conducted, which are consistent with the simulation results. (2) Multiple sets of tunable dual-wavelength lasing outputs with different wavelength intervals are implemented by using tapered TCPCF filters. Among them, the maximum tunable range can reach up to 14.36 nm with the SMSR of higher than 52 dB.…”

Femtosecond mode‐locked erbium‐doped fibre laser with Alq 3 saturable absorber

“…Transition metal dichalcogenides (TMDs), such as molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ), have been extensively used as SAs for pulse laser applications [12, 13, 14]. However, TMDs have limited performance, as they have low damage threshold [15] and relatively large bandgap near the visible region [16]. Recently, black phosphorous (BP) [17] has been investigated and demonstrated as SAs, as it shows complementary and distinct properties of controllable bandgap, which is an attractive property for electro‐optic applications.…”