Abstract
Various kinds of widely tunable solid-state lasers and optical parametric oscillators have been developed, but the tuning region is limited by the bandwidth of the coatings rather than the potential tuning region of the laser material itself. Recently, however, breakthroughs in the coating technologies have been overcoming these problems. For example, cw operation over the entire tuning region (over 400 nm) of a CW Ti: sapphire laser has been demonstrated using a new broad-band, low-loss mirror set.
