INVESTIGATION OF A MULTI-OSCILLATOR RING LASER WITH MAGNETOOPTIC BIAS

A multi-oscillator ring laser of monolithic construction has been inve stigated. The four modes of two circular polarizations and opposite di rections are biased away from lock-in by using an out-of-plane cavity and the Zeeman effect on the gain medium or a magneto-optic mirror. Fo ur-mode operation and rotation sensing have been demonstrated, Means t o cancel the applied bias are discussed, Measured bias and loss parame ters are given for the polar and transverse Kerr effects for a multi-l ayer dielectric mirror with a bismuth substituted yttrium iron garnet coating.