摘要 |
The present invention relates to a method of using at least a part (12) of a cavity (6, 30) for a first (4) and at least one second laser (28), comprising the steps of: providing a first laser beam (4) to the part (12) of the cavity (6, 30), splitting the first beam (4) into a first (42) and a second part (44), splitting the first part (42) into a third and a fourth part, splitting the second part (44) into a fifth and a sixth part, superimposing the third and the fifth part in a way causing extinguishing interference, superimposing the fourth and the sixth part in a way causing cumulative interference to provide a first resulting beam (46), and performing the above steps with at least one second laser beam (28) provided to the same part (12) of the cavity (6, 30) to provide a second resulting beam (52).
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