Single-mode diode-pumped Tm-Ho:KYF4 laser widely tunable around 2 µm
Authors: Galzerano G., Taccheo S., Laporta P., Sani E., Toncelli A., Tonelli M.
Autors Affiliation: Ist. Fotonica e Nanotechnologie-CNR, Ist. Naz. per la Fis. della Materia, Dipto. Fis. del Politec. di Milano, Piazza L. da Vinci 32, Milano 20133, Italy; NEST, Ist. Naz. per la Fis. della Materia, Università di Pisa, Via F. Buonarroti 2, 56100 Pisa, Italy
Abstract: The development and characterization of a room-temperature single-mode 2-µm TmHo:KYF laser are presented A maximum single-mode CW output power of ~70 mW at the central wavelength of 2.078 µm has been obtained. In multimode operation, KYF laser has showed, to our knowledge, the largest tunability range (99 nm) ever obtained for Tm-Ho codoping in any crystalline host, whereas the single-mode emission could be tuned over a range of ~40nm. Frequency and relative intensity noise have been investigated showing a 1 -ms emission linewidth of ~600 kHz and an intensity noise spectrum which is quantum-noise limited for Fourier frequencies higher than 1 MHz.
KeyWords: Continuous wave lasers; Fourier optics; Frequencies; Holmium; Optical resolving power; Pumping (laser); Thulium, Fourier frequencies; Room temperature (RT); Tunability, Semiconductor lasersDOI: 10000000000