Impact Statement:In this paper, wavelength-changeable phenomenon in a passively Q-switched composite Tm/Ho:YAG laser is demonstrated, which provides a potential multifunctional Q-switched...Show More
Abstract:
We demonstrate a direct diode-pumped passively Q-switched (PQS) Tm/Ho composite laser with a developed compact hybrid cavity, where the lasing wavelengths were changeable...Show MoreMetadata
Impact Statement:
In this paper, wavelength-changeable phenomenon in a passively Q-switched composite Tm/Ho:YAG laser is demonstrated, which provides a potential multifunctional Q-switched laser at 2 μm with changeable wavelengths between different type of rare-earth ions in a single bulk gain medium. Combining both advantages of single Tm laser and Ho laser, broader application range in fields such as medical treatment, gas sensing, and radars is expected with this laser, which is compact and accessbile.
Abstract:
We demonstrate a direct diode-pumped passively Q-switched (PQS) Tm/Ho composite laser with a developed compact hybrid cavity, where the lasing wavelengths were changeable from Ho laser to Tm laser via decreasing initial transmittance of the crystalline Cr:ZnSe saturable absorbers (SAs) from 95%, 92%, to 89%. Using a common 808 nm diode laser as the pump source, maximum average output power of 390 mW, maximum pulse energy of 39 uJ, and the shortest pulse with a full width at half maximum of 22 ns were obtained at lasing wavelengths of 2122 nm, 2090 nm, and 2011 nm respectively, where these peak wavelengths remained stable during the PQS processes with different SAs.
Published in: IEEE Photonics Journal ( Volume: 12, Issue: 3, June 2020)
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