LASER SYSTEMS

摘要

LASER SYSTEM The invention relates to laser systems of the type comprising optical fibre amplifiers. A laser system comprises a first laser 1 and a second laser 2. The second laser 2 is pumped at a first wavelength .lambda.1 and caused to lase at a second wavelength .lambda.2. The first laser 1 has absorption bands at .lambda.1 and .lambda.2. The output .lambda.2 of laser 2 and the remnant pump at .lambda.1 are coupled and both are used to pump the first laser 1, thus causing laser 1 to lase at a third wavelength .lambda.3. (Figure 1)