Depressed cladding waveguide structures have been fabricated
in BiB3O6 nonlinear crystal by using femtosecond (fs) laser inscription.
The nonlinear properties of original BiB3O6 crystal have been well
preserved within the waveguide volume. Under 800 nm continuous wave
laser pumping, the guided-wave second harmonic generation of violet light
at 400 nm has been realized, with a maximum power of ~1.05 mW and a
conversion efficiency of ~0.98%/W
