Picosecond parametric optical oscillator with amplification of radiation from tunable semiconductor laser

Amplification of narrow band seeding radiation is considered as a method of producing finite spectrum picosecond emission pulses from the frequency tunable laser of a parametric optical oscillator for spectroscopy, which requires that emission pulses finite spectrum, a method more effective than use of two crystals. The seeding source must be a wavelength tunable one, with injection lasers on AIIIBV or AIVBVI semiconductors which are suitable for this purpose. A parametric optical oscillator using an LiNbO3 crystal was developed. Such a semiconductor amplifier laser is tunable over the 0.6-40 micro range of wavelengths by controlling temperature, pumping current, pressure or magnetic field intensity. Synchronization of the amplifier laser with the picosecond oscillator laser is achieved a photodiode receiving a part of the oscillator radiation. The oscillator frequency can be varied through a 70 cm to the -1 power range by varying the temperature of the semiconductor laser over the 60-80 K range.