Advances in diode-laser-based nonlinear blue sources as well as blue injection lasers have generated interest in using these sources for optical data storage. Recording results using a 429-nm, frequency doubled-diode laser are illustrative in understanding the requirement on these laser sources. A very stringent requirement on the laser source is the low cost necessary for high market penetration of the storage device.
William J. Kozlovsky,
"Optical data storage requirements on short-wavelength laser sources", Proc. SPIE 2379, Solid State Lasers and Nonlinear Crystals, (10 April 1995); doi: 10.1117/12.206470; https://doi.org/10.1117/12.206470