A new method mutual Kerr-lens mode-locking is presented which provides for a means to define the crossing point of counter-propagating waves in a ring or linear laser, without the use of an saturable absorber. Blue radiation emanating from the crystal was identified as surface second harmonic and sum frequency generation. The latter appearing only in condition of bidirectionality, provides a convenient means to verify that pulses are indeed crossing in the nonlinear crystal. This laser has promising applications for rotation sensing, motion sensing, electro-optic sampling and phase spectroscopy.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics