Nanosecond pulse and dual-wavelength Q-switched 1.5 µm fiber laser using MAX phase Cr2TiAlC2 saturable absorber

We demonstrated a new type of MAX phase material, chromium titanium aluminum carbide (Cr 2 TiAlC 2 ) polymer film, to generate a passively Q-switched erbium-doped fiber laser (EDFL). The film thickness was measured to be around 45 µm, which was fabricated using the embedding method with polyvinyl al...

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Bibliographic Details
Published in:Optoelectronics letters 2025, Vol.21 (1), p.7-12
Main Authors: Al-Hiti, Ahmed Shakir, Hassan, Hiba
Format: Article
Language:English
Subjects:
Absorbers
Aluminum carbide
Doped fibers
Erbium
Fiber lasers
Film thickness
Lasers
Nanosecond pulses
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Polymer films
Polymers
Polyvinyl alcohol
Pulse duration
Q switched lasers
Thickness measurement
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Summary:We demonstrated a new type of MAX phase material, chromium titanium aluminum carbide (Cr 2 TiAlC 2 ) polymer film, to generate a passively Q-switched erbium-doped fiber laser (EDFL). The film thickness was measured to be around 45 µm, which was fabricated using the embedding method with polyvinyl alcohol (PVA) polymer as hoster. The saturable absorber (SA) film demonstrates a dual-wavelength passively Q-switched EDFL which operates at 1 531 nm and 1 560.19 nm, respectively. The Q-switching pulse duration could be varied from 2.46 µs to 770 ns, while the repetition rate varied from 92.76 kHz to 106.6 kHz with an increasing input pumping range from 154 mW to 300 mW. The maximum output power and pulse energy of 15.05 mW and 141.18 nJ were obtained at the maximum input power of 300 mW, respectively.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-025-3283-x