公开(公告)号：CA1288156C

公开(公告)日：1991-08-27

申请号：CA571401

申请日：1988-07-07

Applicant: IBM

Inventor： BAUMERT JEAN-CLAUDE J E ,  BJORKLUND GARY C ,  LENTH WILFRIED ,  RISK WILLIAM P III ,  SCHELLENBERG FRANKLIN M

IPC: G02F1/39 ,  G02F1/35 ,  G02F1/355 ,  H01S3/094 ,  H01S3/10 ,  H01S3/108

Abstract: WIDE TOLERANCE, MODULATED BLUE LASER SOURCE A process and apparatus are disclosed for producing a beam of coherent radiation at essentially 459 nm by mixing, in a nonlinear crystal consisting essentially of KTP, two laser beams, one at essentially 1064 nm and the other at essentially 808 nm. The 1064 nm radiation is derived from a Nd:YAG laser that consists of an input mirror, an output mirror and a Nd:YAG crystal, and contains also the KTP crystal. The Nd:YAG laser is pumped by an essentially 808 nm semiconductor diode laser beam, which passes through the input mirror and through the KTP crystal into the Nd:YAG laser crystal where it is absorbed. The 1064 nm radiation oscillating inside the Nd:YAG laser resonator is mixed either with the said 808 nm pump beam or with 808 nm radiation provided by a second semiconductor diode laser whose light is coupled with the 1064 nm beam using a beamsplitter. The essentially 459 nm beam passes through the output mirror to a utilization device.