Compact eye-safe laser sources based on OPOs with KTP or PPKTP crystals

✍ Scribed by Liviu Neagu; Constantin Ungureanu; Razvan Dabu; Aurel Stratan; Constantin Fenic; Laurentiu Rusen

• Book ID: 103875538
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 802 KB
• Volume: 39
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/j.optlastec.2006.06.004

✦ Synopsis

We report on compact eye-safe nanosecond laser sources emitting in the 1.5 mm wavelength range based on non-critically phasematched parametric interaction in optical parametric oscillators (OPOs) with KTP and periodically poled KTP (PPKTP) crystals, pumped by the fundamental frequency of Nd:YAG lasers. As much as 250 mJ signal pulse energy at 1.5 mm wavelength, 6.5 ns FWHM pulse-width, has been obtained in a PPKTP-OPO, extracavity pumped by a Nd:YAG microlaser oscillator-amplifier at 650 mJ pump pulse energy, 8 ns pulse-width. A single signal pulse of 2.7-mJ output energy at 1.57 mm wavelength, less than 5 ns pulse-width, was generated in a KTP-OPO, intracavity pumped by a passively Q-switched Nd:YAG laser.