DIAMOND LASER AND METHOD OF PRODUCING THE SAME AND METHOD OF ACTING THE SAME

摘要

A diamond laser formed of synthetic diamond and providing high output power and variable wavelength in the near infrared region. The maximum value of the optical density of H2 centers in the direction of pumping light is in the range of 0.01 - 4. Laser action is effected in the range of 1000 - 1400 nm by means of external pumping light at 650 - 950 nm. Such diamond laser is produced by preparing a synthetic Ib type diamond whose nitrogen concentration is 1 x 10<1><7> - 8.5 10<1><9> atoms/cm<3>, subjecting this synthetic diamond to electron irradiation to a dose of not less than 5 x 10<1><7> electrons/cm<2>, and heat-treating the synthetic diamond in a vacuum of not more than 1 Torr or in an inert gas atmosphere and at 1400 - 1850 DEG C. Let Ith the threshold value of pumping light intensity necessary for laser action. Then, to make the pumping light intensity I greater than Ith throughout the laser crystal, it is important that the maximum value of optical density of H2 centers be between 0.01 and 4.