An optical recording and reproducing apparatus which suppresses the generation of a noise component in a servo signal while preventing a deterioration in using efficiency of a light beam is provided. A plurality of light diverging portions is arranged on the light output surface and around a center of the light output surface. The active device region includes a gate. The closed bottom portion is coupled to the bank holder and extends away from the bank holder. The oscillator may be driven resonantly in some or all axes.