Picosecond laser oscillator with a cavity design for stable CW mode-locking operation

✍ Scribed by Runwu Peng; Lijun Tang; Lin Guo; Xiaofu Zhang; Fangqin Li; Zuyan Xu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 440 KB
• Volume: 42
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/j.optlastec.2010.04.003

✦ Synopsis

A detailed design of a picosecond laser oscillator is made by using optical resonance theory and semiconductor saturable absorber mirror continuous wave mode-locked technology. Mode parameters in the optical resonance including beam sizes on the laser crystal and mode locker are calculated. By theoretical calculations, 3.7 W output power is obtained at a pump power of 11 W and the optical to optical efficiency is 34% in the designed model of picosecond laser. Based on the detailed design, an experiment is proceeded and a picosecond laser oscillator of about 3.5 W output power with 10.6 W pump power is fabricated. The optical to optical efficiency of the laser is 33%, the pulse duration is about 20 ps, and the repetition rate is about 80.3 MHz. The oscillator presents long-term stability in the experiment.