| [1] | John W,McConkey,J.O.S.A.,1969,Vol.59,No.l0,P.1262-1266. |
| [2] | P.H.M.Vaessen et al.,Phys,Lett.,1978,Vol.68A,No.2,P.204-206. |
| [3] | B.E.Warner et al.,IEEE.J.Q.E,1978,QE-14,No.8,P.568-570. |
| [4] | H.J.Eichler et al.Opt,Comm.,1980,Vol.34,No.2,P.228-230, |
| [1] | John W,McConkey,J.O.S.A.,1969,Vol.59,No.l0,P.1262-1266. |
| [2] | P.H.M.Vaessen et al.,Phys,Lett.,1978,Vol.68A,No.2,P.204-206. |
| [3] | B.E.Warner et al.,IEEE.J.Q.E,1978,QE-14,No.8,P.568-570. |
| [4] | H.J.Eichler et al.Opt,Comm.,1980,Vol.34,No.2,P.228-230, |