Self-starting harmonic mode-locked Tm-Bi co-doped germanate f iber laser with carbon nanotube-based saturable absorber

Abstract

We report a ring cavity passively harmonic mode-locked fiber laser using a newly developed thuliumbismuth co-doped fiber (TBF) as a gain medium in conjunction with a carbon nanotube (CNT)-based saturable absorber. The TBF laser generates a third harmonic mode-locked soliton pulse train with a high repetition rate of 50 MHz and a pulse duration of 1.86 ps. The laser operates at 1 901.6 nm with an average power of 6.6 mW, corresponding to a pulse energy of 0.132 nJ, at a 1 552 nm pump power of 723.3 mW. OCIS codes: 320.0320, 140.0140.

Mechanical and ∼2μm emission properties of Tm3+-doped GeO2–TeO2 (or SiO2)–PbO–CaO glasses

“…Most studies have been focused on the development of fiber laser systems capable of delivering efficient high-power output at a wavelength of 2 lm because of its applications in the area of remote sensing, medical surgery, environmental sensing, and light sources for efficient mid-IR generation [6][7][8][9]. The well-known electrical transition ( 3 F 4 -3 H 6 ) of Tm 3+ ion is used for fabricating a 2 lm light source.…”

$\sim 2$ -$\mu \text{m}$ Single-Mode Laser Output in Tm3+-Doped Tellurium Germanate Double-Cladding Fiber

“…1(a). The absorption spectrum was characterized by transition bands from the 3 H6 ground state to the excited states 3 F4, 3 H5, 3 H4, 3 F2, 3,1 G4. This spectrum exhibited strong absorption near 792 nm, which significantly overlapped with the emission band of present fully developed AlGaAs diode lasers.…”

“…M 3+ lasers operating on the 3 F4-3 H6 transition near 2 μm have attracted considerable attention owing to their potential applications such as environmental sensing, medical surgery, and light sources for efficient mid-IR generation [1][2][3][4]. In addition, high-degree stark splitting property of the 3 H6 energy level by local electric field yields a broad emission band.…”

14.5 GHz passive harmonic mode-locking in a dispersion compensated Tm-doped fiber laser

“…have reported 387.6 MHz (60 th ) HML with graphene-polymer composite in a Tm-doped ring fiber laser 16 . By using carbon nanotube-based SA, 50 MHz (3 th ) and 213 MHz (25 th ) HMLs have been reported, respectively 17 , 18 . 705.9 MHz (37 th ) HML based on fiber-taper-based black phosphorus has been observed in a Tm/Ho doped ring fiber laser 19 .…”