Stable diode-pumped microlaser with two crossed intracavity frequency doublers

Summary form only given. Several methods have been worked out to solve the green problem, which leads to large temporal instabilities and oscillations in the frequency doubled laser emission, e.g. using a quarter-wave plate inside the cavity, polarizers or polarizing effects, or special resonator setups. We present a new method for stable frequency doubled laser operation using a special crystal design.