Continuously-pumped (CW or Continuous Wave) Nd:YAG lasers have now been used in industry for more than 15 years. The diversity of industrial laser applications and operating environments which have developed over the years has dictated the design criteria of lasers which are expected by the user to operate flawlessly, in many instances 24 hours per day, 7 days per week continuously. The pressures of laser performance, reliability, ease of maintenance, and price in a competitive market strongly influence the design considerations of these lasers.
Robert L. A. Schricker,
"Design Considerations Of Industrial CW-pumped Nd:YAG Lasers", Proc. SPIE 0609, Flashlamp Pumped Laser Technology, (30 June 1986); doi: 10.1117/12.966628; https://doi.org/10.1117/12.966628