TECHNIQUES FOR REDUCING AND / OR ELIMINATING SECONDARY MODES IN A DYE LASER OSCILLATOR

摘要

P THIS OSCILLATOR IS DESIGNED TO ENSURE A SINGLE MODE OUTPUT, TO KNOW, A BEAM OF PRIMARY LIGHT 30 OF A SPECIFIC WAVELENGTH, BUT WHICH ALSO TENDS TO ENSURE SECONDARY MODES, TO KNOW, BEAMS OF SECONDARY LIGHT 32 AT DIFFERENT WAVELENGTHS AND SLIGHTLY OUTSIDE THE AXIS IN RELATION TO THE PRIMARY BEAM 30 DUE TO REFLECTIONS WITH A RAISING INCIDENCE WITHIN THE CELL 12 WITH DYE BEING PART OF THE MASTER OSCILLATOR. IT INCLUDES FOR THIS PURPOSE A MIRROR 22 OF OUTPUT COUPLING, ACCORDING TO THE AXIS OF THE PRIMARY BEAM SPACE OF THE CELL AND AN OPAQUE MEMBER 34 LOCATED BETWEEN THIS MIRROR AND THE DYE CELL AND HAVING AN OPENING 36 TO LET THE PRIMARY BEAM PASS. /P