It might be possible, but the boeing device works by creating a
transient medium, different from the first medium, interposed between the shockwave and the protected region such that the shockwave contacts the second, transient medium and is attenuated in energy density before it reaches a protected asset in the protected region.
which means due to the different physical characteristics of the two mediums, the shockwave is reflected/weakend. The second medium (=shield medium) is created by having electric energy flow through a conductive path created by laser ionization (if I got that right) and heating the path.
To create a shockwave by heating air or another liquid with a laser, you'd need a lot of power. So much power, that aiming the laser directly at your opponent/target would be way more effective.
I'll leave the calculations to someone else.