BigPatents India

A Twin side Laser resonator includes a laser head which has a high gain medium such as a lightly doped Nd:YAG rod or Nd: Glass rod contained within optical resonator wherein laser beam flows from the optical axis of the same. The laser beam from the both end of the resonator is coupled out by means of output mirrors. The output beam is collimated in the region of the output mirrors. The said laser head provided between the output mirrors for causing induced emission; an aperture means for deciding a beam mode of a laser beam generated between the output mirrors. Apertures means are provided between the out put mirrors and set to a specified hole diameter. Also apertures restricts the light amplification along the off-axis of laser resonator and thus provides sharp frequency band. Drawing: 2 Sheets. Total Pages: 11 Fig. Nil