Oh well.. maybe optical combiners will be improved and new and different wavelengths e.g. 485, 550, 610nm etc dpss will appear on the market making for more flexability in the future. They're always coming up with new stuff..
Maybe even a tunable module ... or a diode pumped compact dye laser or...?
I found this article in Laser Focus World:
Ultrafast white-light continua from filaments in water interfere
Given the proper conditions, a white-light continuum (WLC) can be generated by focusing pico- or femtosecond pulses into condensed matter. One property of a WLC produced in this manner is its coherence: each spectral component has the same coherence as the pump light and thus appears as if it were laser light. Scientists at Heriot-Watt University Edinburgh, Scotland, and Qinetiq (Malvern, England) have made this property plain to see by creating more than one WLC from the same laser and interfering their light to produce fringes.
Focusing the output of a Ti:sapphire laser (1-mJ, 12-fs pulses) into water using a cylindrical lens produced a stable one-dimensional array of white-light filaments. Reducing the pulse energy to 780 µJ caused all but two filaments to disappear. The two that remained were separated by 184 µm and had 1/e2 diameters of 25.8 and 19.3 µm for 700- and 600-nm wavelengths, respectively. Light from the pair interfered to produce fringes that were stable over greater than a 10-min time interval, easily observed at the 600- and 700-nm wavelengths with bandpass filters. Contact Ajoy Kar at
a.k.kar@hw.ac.uk.