metric Oscillator - Beckman Institute Laser Resource Center

Dichmic Beam SepamtionThe output beam from the power oscillator contains the collinear signal and idlerwaves, which need to be separated for most applications. Consequently, all MOPO-700 systems contain a broadband dichroic pair to separate the two beams. The use oftwo dichroic optics ensures >97% spectrally pure beams. The final outputs are paralleland spaced two inches apart.By designing the oscillators to be singly resonant over the signal wavelengthrange, a single set of broadband optics allow continuous tuning from 410nm to2000nm. This means that no mirror realignment or change is necessary when scanningacross the visible or near IR spectrum.Automated Control Elec~nicsThe MOPO-700 Series makes use of the latest generation of microprocessor-basedcontrol electronics to provide the ultimate in ease of use and reliability. The frontpanel of the controller has a large, easy to read backlit LCD display. Push buttoncontrols provide simple access to menus which allow the user to set all the necessaryoperating parameters. Options include: continuous or incremental scans, scan speed,scan increment, delay times, number of scans and home position. Optional RS-232,IEEE-488 interfaces and even a fax modem allow easy connection with existing laboratorycontrol and data acquisition equipment.The electronics contain a UL compatible computer style internal powersupply, a microprocessor based controller board, and a main drive board for crystalrotation. The BBO crystal is tuned by rotating the crystal to a known angle for eachwavelength by this main drive board.