Laser Phase Front Measurements Using a Phase Conjugate Twyman-GreenInterferometer

摘要

This study demonstrated the use of a phase conjugate TwymanGreen interferometerfor measuring the phase fronts of beams emitted by infrared diode lasers operating at 830 nm. This interferometer successfully measured the phase front of a single element diode laser, providing better resolution than its conventional counterpart. The phase conjugate mirror compensated for aberrations introduced by imperfect optics in the phase conjugating arm of the interferometer. This interferometer was unable to measure the phase front of a diode array due to the array's inability to create a phase conjugate return. The array's short coherence length is believed to be the main cause preventing the phase conjugate return.... Phase conjugation, Barium Titanate(BaTiO3), Interferometer, Twyman-Green, Phase Front.