公开(公告)号：SE306121B

公开(公告)日：1968-11-18

申请号：SE1180161

申请日：1961-11-27

Applicant: IBM

Inventor： SOROKIN P ,  STEVENSON M

IPC: H01S3/042 ,  H01S3/093 ,  H04B10/04 ,  H01S3/16

Abstract: In an optical maser like the maser described in Specification 982,410, the host crystal, which may be calcium fluoride, is doped with divalent samarium. The pumping frequency produces transitions from a ground state A to an excitation state D from which there are non-radiative transitions to a metastable state C close to the excitation state D. A transition from metastable state C to terminating state B close to the ground state produces the output which is in the same part of the spectrum (red) as the pumping frequency. The two non-radiative transitions Y1, Y2 involve only small energy changes.