Donald Scarl

Diode-pumped 1.34-μm Nd 3+ :YAlO 3 laser

We have pumped Nd(3+):YAlO(3) lasers with a 40-stripe, 500-mW, 807-nm diode laser. Maximum output powers at 1.34 microm of 26 mW multimode and 20 mW in a single transverse mode were achieved. The several longitudinal modes had a total spectral width of ~0.4 nm.

Photomultiplier dark pulses

Dark pulse distributions from three types of photomultiplier have been fitted to Poisson distributions, both for pulses originated by single electrons and for larger pulses. These distributions can be used to determine the first-dynode secondary-emission coefficients, the fraction of electrons that create positive ions, the number of secondary electrons created by each positive ion, and the rate of output pulses above a fixed discriminator level.

Temperature tunable 1341-nm monolithic Nd 3+ :YAlO 3 laser

A short cavity monolithicN d(3+):YA10(3) laser pumped by a forty-stripe diode array has produced 7 mW of TEM(00)power in only three longitudinal modes. The central mode is smoothly temperature tunable from 1341.0 to 1341.6 nm at the rate of 15.0 +/- 0.5 pm/ degrees C.

Diode-Pumped 1.34-5 mm Nd:YAlO3 Laser

Nd3+ in YAlO3 is a useful source of laser light tunable over a range of about 0.5 nm near 1341 and 1080 nm. It has strong absorption lines at 796, 807, and 812nm, where diode pump lasers are readily available.