Title

Diode-Pumped Ytterbium-Doped Sr5(Po4)3F Laser Performance

Abstract

The performance of the first diode-pumped Yb3+-doped Sr5(PO4)3F (Yb:S-FAP) solid-state laser is discussed. An InGaAs diode array has been fabricated that has suitable specifications for pumping a 3 × 3 × 30 mm Yb:S-FAP rod. The saturation fluence for diode pumping was deduced to be 5.5 J/cm2 for the particular 2.8 kW peak power diode array utilized in our studies. This is 2.5×higher than the intrinsic 2.2 J/cm2 saturation fluence as is attributed to the 6.5 nm bandwidth of our diode pump array. The small signal gain is consistent with the previously measured emission cross section of 6.0 × 10-20 cm2, obtained from a narrowband-laser pumped gain experiment. Up to 1.7 J/cm3 of stored energy density was achieved in a 6 × 6 × 44 mm Yb:S-FAP amplifier rod. In a free running configuration, diode-pumped slope efficiencies up to 43% (laser output energy/absorbed pump energy) were observed with output energies up to ∼0.5 J per 1 ms pulse. When the rod was mounted in a copper block for cooling, 13 W of average power was produced with power supply limited operation at 70 Hz with 500 μs pulses.

Publication Date

4-1-1996

Publication Title

IEEE Journal of Quantum Electronics

Volume

32

Issue

4

Number of Pages

650-656

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/3.488839

Socpus ID

0030129235 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0030129235

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