Spectral characteristics of cascade master/slave/slave injection-locking of laser diodes

We have developed the master/slave/slave laser spectrometer in the blue-wavelength region. It comprises a master/slave laser combination coupled with a second-harmonic generation (SHG) enhancement cavity and a SHG-injected blue diode laser. The total power of 30 mW was obtained and the spectral characteristics and power were measured. Excluding the power of the satellite longitudinal mode of a slave/slave laser, the total power of 422.791 nm light which can be used for the magnetooptic trap for Ca was 25.5 mW.