Tunable Single-Frequency Nd:YVO BiB/ O Ring Laser at 671 nm

摘要

A record of 680-mW single-frequency red emission at 671.1 nm is demonstrated using a Nd:YVO$_{4}$ ring laser intracavity frequency-doubled by a type-I critically phase-matched $hbox{BiB}_{3} hbox{O} _{6}$ crystal. Single-frequency tuning over $Delta lambda _{rm red} sim {hbox {1.25~nm}}$ can be achieved with a thin etalon with reflectivity of 40%. At 1342.5 nm and with a $T= $2% transmission output coupler, the laser provides an optimal 1.55 W of single-frequency power.