Wavelength-tunable, dual-wavelength Q-switched Ho3+-doped ZBLAN fiber laser at 1.2 µm

High power tunable Raman fiber laser at 1.2 μm waveband

“…Currently, fiber lasers operating at 1.2 μm waveband can be divided into two groups in terms of the lasing mechanism. The first one adopts some special ion-doped fibers such as bismuth-doped fiber or holmium-doped fluoride fiber to provide optical gain at this waveband directly [ 17 – 19 ]. However, due to the relatively small gain coefficient and difficulties in the fiber fabrication process, the output power of these lasers at 1.2 μm waveband is limited within ten-watt level [ 18 , 19 ].…”

Ho3+-Doped All-Fiber Laser Q-Switched by D-Shaped Fiber Carbon-Nanotube Saturable Absorber

“…Q-switched and mode-locked Ho 3+ -doped ZBLAN fiber lasers at 1.2 µm have also been demonstrated with saturable absorbers including semiconductor saturable absorber mirror (SESAM), graphene, and carbon-nanotube (CNT) by taking advantage of their simple format, compact size, and mature fabrication technology [8][9][10][11][12]. For some practical applications, such as laser guide star, Q-switched Ho 3+ -doped fiber laser is an ideal pump laser source to generate microsecond yellow laser pulses that are preferred to gate out atmospheric Rayleigh scattering noise for imaging improvement [13,14].…”