Theoretical modeling and analysis of a passively Q-switched Er-doped fiber laser with Tm-doped fiber saturable absorber

Modeling and Analysis of a Pulsed Er-Tm Fiber Laser System

“…This result is consistent with that in Ref. [16]. And, as more 1570 nm photons are confined inside of the cavity, the peak power and average output of the 1860 nm pulses rise, as depicted in Fig.…”

“…Parameters used in the numerical simulation are listed in Table I [5], [8], [16]- [19]. In the simulation of the passively Q-switched Er-doped fiber laser, R 3 and R 4 are not taken into consideration.…”

“…Without FBG 3 and FBG 4, this laser structure turns into a passively Q-switched Er-doped fiber laser as discussed in Ref. [16].…”

“…Typically, N 3 is taken as zero [16], [17]. Rate equation of this Er-Tm fiber laser system could be written as…”

“…334.7 μs [5], [18], [19] A 63.6 × 10 −1 2 m 2 σ as 0.56 × 10 −2 5 m 2 [5], [18], [19] c 3 × 10 8 m/s σ es 5.96 × 10 −2 5 m 2 [5,[18][19]] n 1.5 σ a 4.6 × 10 −2 6 m 2 [16], [17] δ 0.01 σ e 2.3 × 10 −2 5 m 2 [16], [17] l 9 m σ ap 3.1 × 10 −2 5 m 2 [16], [17] l p 1 m σ as sa…”