A diode-pumped laser with a direct edge coupling of a pump beam is
provided. The laser includes a microchip laser cavity optically pumped by
a laser diode emitting an astigmatic pump beam having a substantially
elliptical beam cross-section at an output laser diode facet. The
microchip laser cavity is disposed at a substantial distance exceeding
0.001'' from the laser diode pump where the astigmatic pump beam has a
greatly reduced ellipticity, providing high laser output efficiency
without coupling lens element between the laser cavity and the laser
diode pump. The pumping arrangement is favourable for single-mode lasing.
In some embodiments, the laser cavity includes nonlinear crystal for
intra-cavity SHG, a saturable absorber for passive Q-switching and mode
locking, and a polarizing prism.