公开(公告)号：US3576502A

公开(公告)日：1971-04-27

申请号：US3576502D

申请日：1968-05-13

Applicant: BELL TELEPHONE LABOR INC

Inventor： JHONSTON WILBUR D JR ,  LI TINGYE ,  SMITH PETER W

IPC: H01S3/098 ,  H01S3/00

CPC classification number: H01S3/10092 ,  H01S3/0064 ,  H01S3/08045 ,  H01S3/0805

Abstract: Transverse mode switching is accomplished in a laser oscillating in at least one transverse mode by the injection therein of a low level seeding signal of the desired output mode. If the laser is designed to enhance transverse mode competition (i.e., the cavity geometry approaches either a concentric or plane parallel configuration), then a seeding signal of the correct frequency will cause the laser to switch (i.e., spatially lock) to oscillation entirely in the injected mode. In addition, if the cavity resonator is frequency degenerate at the frequency of a complex (i.e., many transverse modes) input signal, and if the resonator is designed to provide approximately equal gain for all of these transverse modes, then the laser will lock onto the transverse modes of the input signal and image-amplify the signal.