Vanadium pentoxide film for microsecond pulse generation in 1.5-µm region

Abstract

Q-switched erbium doped fiber laser (EDFL) was passively realized using vanadium pentoxide (V₂O₅) embedded into polyethylene glycol (PEG) film as saturable absorber (SA). The laser could successfully generate stable self-starting pulses when the V₂O₅ film was placed in an EDFL cavity. It operated at 1 562.4 nm wavelength. The repetition rate can be varied from 91.7 kHz to 128.2 kHz while the pulse width shrank from 10.90 µs to 7.81 µs with rising pump power from 110.9 mW to 166.5 mW. The pulse energy recorded was 3.2 nJ at pump power of 166.5 mW. The results indicate that the saturable absorption of V₂O₅ has promising nonlinear photonic applications especially in fiber laser development for 1.5-µm region.

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