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Q-Switched fiber laser generation using a D-shaped titanium aluminum carbonitride saturable absorber
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DOI：10.1080/09500340.2026.2643847.png)
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Abstract
En 中文
We demonstrated a stable dual-wavelength Q-switched fiber laser using a Ti3Al(C0.5, N0.5)2-PVA saturable absorber (SA) deposited on a D-shaped fiber, generating pulses at 1531.36 and 1558.38 nm. The fabricated SA exhibited a modulation depth of 19.6% and a saturation intensity of 0.07 MW/cm & sup2;. Integrated into the laser cavity, the SA enabled Q-switching over a pump power range of 38-75 mW, with repetition rates increasing from 35.3 kHz to 51.9 kHz and pulse widths narrowing from 6.58 & micro;s to 3.57 & micro;s. A high signal-to-noise ratio of 50 dB confirmed pulse stability. The laser achieved a maximum output power of 5.7 mW and pulse energy of 84.75 nJ. These results highlight Ti3Al(C0.5, N0.5)2 as a promising SA for compact, efficient pulsed fiber lasers operating around 1.55 & micro;m.
Keywords:
Dual-wavelength
MAX phase
D-shaped fiber
fiber laser
passive saturable absorber
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