Tris‐(8‐hydroxyquinoline) aluminium thin film as saturable absorber for passively Q‐switched erbium‐doped fibre laser

Q-switched EDF LASER Cavity using ITO as Saturable Absorber

“…The highest possible rate of repetition and the smallest pulse width were successfully achieved to be 64.52 kHz and 4.23 µs. The Q-switched pulse generated by ITO could produce the pulse width within the similar range to the pulse width of 6.6-1.2 µs produced by 8-Hydroxyquinoline-PVA based SA [17].…”

“…At first, saturable absorbing mirrors on semiconductor (SESAMs) were discovered as a promising SAs which could achieve stable mode locked and Q switched pulses [5]. Owing to the mirror alignment issues in SESAMs, many other potential materials emerged as new SAs which included graphene, black phosphorus, transition metal dichalcogenides (TMDs), topology insulators (TIs), organic materials, metals, metal carbides and metal oxides [6][7][8][9][10][11][12][13]. All these SAs could achieve stable mode locked and Q switched lasers.…”

“…Several thin film based SAs are recently used as Qswitchers in EDFL cavity [15][16][17]. The host materials are usually embedded in polyvinyl alcohol (PVA).…”

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

“…The inset figure presents a scanning electron microscopy image of the thin film; it shows a homogenous and uniform distribution of Alq 3 within PVA. Further details about this SA fabrication and characterisation have been addressed in our previous works in [32, 33].…”

“…Here, we used Alq 3 to develop a mode‐locked laser as well as a high peak power and a high‐energy Q‐switch laser at 1067 nm [32]. Additionally, we used Alq 3 to develop a Q‐switched [33], and tunable wavelength Q‐switched in C‐band region. In our previous work in [34], we developed a mode‐locked fibre laser at a central wavelength of 1561.5 nm with pulse width and repetition rate of 1.6 ps and 1.8 MHz, respectively, in 112.5 m erbium‐doped fibre laser (EDFL) cavity.…”